1. An electronic device, comprising:
a housing defining a through hole, wherein the through hole comprising a sidewall defining a pair of positioning holes; and
a button comprising:
a frame received in the through hole and defining a receiving hole through the frame;
a sliding bar assembly received in the receiving hole and comprising a first sliding bar, a second sliding bar, a first elastic member, and a second elastic member, wherein one end of the first elastic member is received in the first sliding bar, and an opposite end of the first elastic member resists one end of the second sliding bar, one end of the second elastic member is received in the second sliding bar, and an opposite end of the second elastic member resists one end of the first sliding bar, an opposite end of the first sliding bar and an opposite end of the second sliding bar are external to the receiving hole and respectively received in the positioning holes;
an elastic conductive member fixed in the housing and facing the frame; and
a pressing member moveably hooking the frame and comprising a projection, wherein the projection passes through the frame and resists the first sliding bar and the second sliding bar, when the pressing member is depressed by an external force, the projection pushes the first sliding bar and the second sliding bar to compress the first elastic member and the second elastic member and cause the opposite end of the first sliding bar and the opposite end of the second sliding bar to move out of the positioning holes, further pressing the pressing member causes the frame to move until the frame presses the elastic conductive member to actuate the button.
2. The electronic device as described in claim 1, wherein the sliding bar assembly further comprises a receiving space formed by the first sliding bar and the second sliding bar, the receiving space is bounded a pair of opposite first inclined surfaces formed on the first sliding bar and the second sliding bar, respectively, the projection comprises a pair of opposite second inclined surfaces, the second inclined surfaces respectively resist the first inclined surfaces.
3. The electronic device as described in claim 2, wherein the receiving space is arranged between the first elastic member and the second elastic member.
4. The electronic device as described in claim 2, wherein the frame defines an opening, a bottom of the opening defines a slot communicating with the receiving hole, the pressing member is received in the opening, the projection passes through the slot to be received in the receiving space.
5. The electronic device as described in claim 4, wherein the pressing member comprises a pressing plate operable via the through hole, the projection protrudes from the pressing plate.
6. The electronic device as described in claim 5, wherein the pressing member further comprises two sidewalls parallel to each other and perpendicular to the pressing plate, each of the sidewalls defines a hook, the bottom of the opening comprises a pair of latching protrusions, each of the hooks hooks one of the latching protrusions.
7. The electronic device as described in claim 6, wherein the projection is arranged between the sidewalls, and the slot is arranged between the latching protrusions.
8. The electronic device as described in claim 1, wherein the elastic conductive member comprises a protruding portion facing the frame and an elastic portion, when the protruding portion is depressed by the frame, the elastic portion causes the button to be actuated.
9. An electronic device, comprising:
a housing defining a through hole, a sidewall of the through hole defining a pair of positioning holes; and
a button comprising:
a frame received in the through hole and defining a receiving hole through the frame;
a sliding bar assembly received in the receiving hole and comprising a first sliding bar, a second sliding bar, a first elastic member, a second elastic member, and a receiving space, wherein the receiving space is arranged between the first elastic member and the second elastic member, one end of the first elastic member is received in the first sliding bar, and an opposite end of the first elastic member resists one end of the second sliding bar, one end of the second elastic member is received in the second sliding bar, and an opposite end of the second elastic member resists one end of the first sliding bar, an opposite end of the first sliding bar and an opposite end of the second sliding bar are external to the receiving hole and respectively received in the positioning holes;
an elastic conductive member fixed in the housing and facing the frame; and
a pressing member moveably hooking the frame and comprising a projection, wherein the projection passes through the frame to be received in the receiving space and to resist the first sliding bar and the second sliding bar, when the pressing member is depressed by an external force, the projection pushes the first sliding bar and the second sliding bar to compress the first elastic member and the second elastic member and cause the opposite end of the first sliding bar and the opposite end of the second sliding bar to move out of the positioning holes, further depressing the pressing member causes the frame to move until the frame depresses the elastic conductive member to actuate the button.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of producing a piezoelectric ceramic comprising:
providing a body of predetermined shape comprising a mixture of calcined piezoelectric material powder and calcined dielectric material powder, wherein said dielectric material has a higher dielectric constant than said piezoelectric material and the calcined dielectric material power has a particle size which is not more than about one fourth of the particle size of the calcined piezoelectric material powder; and
firing the formed piece, so that a sintered piece as a piezoelectric ceramic is produced.
2. A method of producing a piezoelectric ceramic according to claim 1, further comprising forming said mixture into said predetermined shape.
3. A method of producing a piezoelectric ceramic according to claim 2, further comprising forming said mixture.
4. A method of producing a piezoelectric ceramic according to claim 3, wherein the piezoelectric powder is at least one member of the group consisting of lead titanate zirconate, lead titanate, lead titanate zirconate containing a composite perovskite compound as a solid solution therein, and lead titanate containing a composite perovskite compound as a solid solution therein.
5. A method of producing a piezoelectric ceramic according to claim 4, wherein the dielectric powder is at least one member of the group consisting of a composite perovskite compound, a solid solution of a composite perovskite compound and lead titanate, and the combination of a dielectric constant enhancement oxide and a piezoelectric material.
6. A method of producing a piezoelectric ceramic according to claim 5, wherein the dielectric content does not exceed about 3 weight parts per 100 weight parts of the piezoelectric.
7. A method of producing a piezoelectric ceramic comprising:
providing a body of predetermined shape comprising a mixture of calcined piezoelectric material powder and calcined dielectric material powder, wherein said dielectric material has a higher dielectric constant than said piezoelectric material, and wherein the calcined dielectric material powder is present in an amount of not more than about 3 parts by weight based on 100 parts by weight of the calcined piezoelectric material powder; and
firing the formed piece, so that a sintered piece as a piezoelectric ceramic is produced.
8. A method of producing a piezoelectric ceramic according to claim 7, further comprising forming said mixture into said predetermined shape.
9. A method of producing a piezoelectric ceramic according to claim 8, further comprising forming said mixture.
10. A method of producing a piezoelectric ceramic according to claim 9, wherein the piezoelectric powder is at least one member of the group consisting of lead titanate zirconate, lead titanate, lead titanate zirconate containing a composite perovskite compound as a solid solution therein, and lead titanate containing a composite perovskite compound as a solid solution therein.
11. A method of producing a piezoelectric ceramic according to claim 10, wherein the dielectric powder is at least one member of the group consisting of a composite perovskite compound, a solid solution of a composite perovskite compound and lead titanate, and the combination of a dielectric constant enhancement oxide and a piezoelectric material.
12. A method of producing a piezoelectric ceramic comprising:
providing a calcined piezoelectric material powder;
providing a calcined dielectric material powder, wherein said dielectric material has a higher dielectric constant than said piezoelectric material and having a particle size which is not more than about one fourth of the particle size of the calcined piezoelectric material powder;
mixing the calcined piezoelectric material powder with the calcined dielectric material powder, so that mixed powder is produced;
forming the mixed powder into a predetermined shape, so that a formed piece is produced; and
firing the formed piece, so that a sintered piece as a piezoelectric ceramic is produced.
13. A method of producing a piezoelectric ceramic according to claim 12, wherein the calcined dielectric material powder is mixed with the calcined piezoelectric material powder in an amount not more than about 3 parts by weight based on 100 parts by weight of the calcined piezoelectric material powder.
14. A method of producing a piezoelectric ceramic according to claim 13, wherein the piezoelectric powder is at least one member of the group consisting of lead titanate zirconate, lead titanate, lead titanate zirconate containing a composite perovskite compound as a solid solution therein, and lead titanate containing a composite perovskite compound as a solid solution therein.
15. A method of producing a piezoelectric ceramic according to claim 14, wherein the dielectric powder is at least one member of the group consisting of a composite perovskite compound, a solid solution of a composite perovskite compound and lead titanate, and the combination of a dielectric constant enhancement oxide and a piezoelectric material.
16. A method of producing a piezoelectric ceramic comprising:
providing a calcined piezoelectric material powder;
providing a calcined dielectric material powder, wherein said dielectric material has a higher dielectric constant than said piezoelectric material;
mixing the calcined piezoelectric material powder with the calcined dielectric material powder such that the calcined piezoelectric material powder is not more than about 3 parts by weight based on 100 parts by weight of the calcined piezoelectric material powder, so that mixed powder is produced;
forming the mixed powder into a predetermined shape, so that a formed piece is produced; and
firing the formed piece, so that a sintered piece as a piezoelectric ceramic is produced.
17. A method of producing a piezoelectric ceramic according to claim 16, wherein the piezoelectric powder is at least one member of the group consisting of lead titanate zirconate, lead titanate, lead titanate zirconate containing a composite perovskite compound as a solid solution therein, and lead titanate containing a composite perovskite compound as a solid solution therein.
18. A method of producing a piezoelectric ceramic according to claim 17, wherein the dielectric powder is at least one member of the group consisting of a composite perovskite compound, a solid solution of a composite perovskite compound and lead titanate, and the combination of a dielectric constant enhancement oxide and a piezoelectric material.