Piezoelectric ceramic piece and piezoelectric ceramic piece and stator mounting structure

Abstract

The utility model discloses a piezoelectric ceramic piece and a piezoelectric ceramic piece and stator installation structure, and the piezoelectric ceramic piece comprises a body, a plurality of positive electrodes are formed on the front surface of the body, a back grounding end is formed on the back surface of the body, a plurality of front grounding ends are formed on the front surface of the body, and the positive electrodes and the back grounding ends are arranged in parallel. The front grounding end is electrically connected with the back grounding end, and the front grounding end is located in an area where the piezoelectric ceramic piece does not provide driving force. According to the utility model, the grounding end and the positive electrode are arranged on the front surface of the piezoelectric ceramic piece at the same time, so that the positive electrode and the grounding end can be electrically connected through the front surface during working, and when voltage is applied to the piezoelectric ceramic piece, the piezoelectric ceramic piece can drive the stator elastomer to resonate through the deformation of the piezoelectric ceramic piece; therefore, current does not need to pass through the stator, interference of an external circuit on a ceramic chip driving system is avoided, and the problem that a driving chip or a CPU is damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic motors, in particular to a piezoelectric ceramic sheet and a piezoelectric ceramic sheet and a stator installation structure. Background Art

[0002] Existing ultrasonic motor drivers generally use transformer solutions, but the problem with this solution is that it cannot be miniaturized or low-voltage, and the cost is high. According to the operating principle of ultrasonic motors, after a lot of practice, there are currently chip or CPU drive methods to solve this problem, but the new drive method has hidden dangers in anti-interference and surge protection, and the motor and the frame need to be isolated, otherwise the drive chip or CPU will be easily damaged.

[0003] Therefore, the prior art has defects and needs to be improved. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a piezoelectric ceramic sheet and a piezoelectric ceramic sheet and stator mounting structure.

[0005] The technical solution of the utility model is as follows: The utility model provides a piezoelectric ceramic sheet, including: a main body, a plurality of positive electrodes are formed on the front side of the main body, a back side grounding terminal is formed on the back side of the main body, a plurality of front side grounding terminals are formed on the front side of the main body, and the front side grounding terminals are electrically connected to the back side grounding terminals, and the front side grounding terminals are located in the area where the piezoelectric ceramic sheet does not provide driving force.

[0006] Furthermore, a conductive plating layer is provided at both the front grounding terminal and the back grounding terminal.

[0007] Furthermore, a conductive plating layer is formed on a corresponding side surface of the front grounding terminal to achieve electrical connection between the front grounding terminal and the back grounding terminal.

[0008] Furthermore, the conductive plating layer is a silver plating layer.

[0009] Furthermore, the number of the front grounding terminals is one or two.

[0010] Furthermore, the back grounding terminal covers the entire back surface of the body.

[0011] The utility model also provides a piezoelectric ceramic sheet and stator installation structure, comprising: a stator and the above-mentioned piezoelectric ceramic sheet, wherein the piezoelectric ceramic sheet and the stator are bonded and insulated from each other.

[0012] Furthermore, at least one of a side of the piezoelectric ceramic sheet close to the stator and a side of the stator close to the piezoelectric ceramic is provided with an insulating protective layer, and the piezoelectric ceramic sheet and the stator are bonded and connected by adhesive.

[0013] Furthermore, a side of the piezoelectric ceramic sheet close to the stator and a side of the stator close to the piezoelectric ceramic are both provided with an insulating protective layer.

[0014] Furthermore, the adhesive is epoxy adhesive.

[0015] By adopting the above scheme, the beneficial effect of the utility model is that a ground terminal and a positive electrode are provided on the front side of the piezoelectric ceramic sheet at the same time, so that when the electrical connection is performed, the positive electrode and the ground terminal can be electrically connected through the front side. When a voltage is applied to the piezoelectric ceramic sheet, the piezoelectric ceramic sheet can drive the stator elastomer to resonate through its own deformation, so that the current does not need to pass through the stator, avoiding interference of the external circuit on the ceramic sheet drive system, thereby avoiding the problem of damage to the drive chip or CPU. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the front side of the piezoelectric ceramic sheet according to the first embodiment of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the back side of the piezoelectric ceramic sheet according to the first embodiment of the utility model.

[0018] Figure 3 It is a schematic structural diagram of the front side of the piezoelectric ceramic sheet according to the second embodiment of the utility model.

[0019] Figure 4 It is a structural schematic diagram of the back side of the piezoelectric ceramic sheet according to the second embodiment of the utility model.

[0020] Figure 5 The utility model is a piezoelectric ceramic sheet and stator installation structure implemented in one embodiment. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] See also Figure 1 and Figure 2In this embodiment, the utility model provides a piezoelectric ceramic sheet, including: a main body 10, the main body 10 is in the shape of an annular sheet, a plurality of positive electrodes 13 are formed on the front of the main body 10, a back grounding terminal 12 is formed on the back of the main body 10, the back grounding terminal 12 covers the entire area of ​​the back of the main body 10, a front grounding terminal 11 is formed on the front of the main body 10, and the front grounding terminal 11 is electrically connected to the back grounding terminal 12, and the front grounding terminal 11 is located in an area of ​​the piezoelectric ceramic sheet that does not provide a driving force, such as an isolated pole area, an area on both sides of the isolated pole, and an area opposite to the isolated pole.

[0023] Furthermore, the front ground terminal 11 and the back ground terminal 12 are both provided with a conductive coating, so as to realize the conductive function of the front ground terminal 11 and the back ground terminal 12. And the corresponding side surface of the front ground terminal 11 (which may be at least one of the outer side surface and the inner side surface) is formed with a conductive coating to realize the electrical connection between the front ground terminal 11 and the back ground terminal 12. The conductive coating is a silver coating.

[0024] See also Figure 3 and Figure 4 The utility model also provides a piezoelectric ceramic sheet of another embodiment. The difference from the previous embodiment is that two front grounding terminals 11 are formed on the front of the main body 10, and the two front grounding terminals 11 are also electrically connected to the back grounding terminal 12. This method can make the area of ​​the front grounding terminal 11 larger and the grounding effect more firm. The rest of the parts are the same as the previous embodiment and will not be repeated here.

[0025] In this solution, the front side of the piezoelectric ceramic sheet is provided with both the positive electrode 13 and the ground terminal, so that power can be connected only from the front side, thus avoiding interference caused by current passing through the stator and avoiding damage to the driver chip and CPU in the drive system.

[0026] See also Figure 5 The utility model also provides a piezoelectric ceramic sheet and stator installation structure, including: a stator 3 and the above-mentioned piezoelectric ceramic sheet 1, wherein the piezoelectric ceramic sheet 1 and the stator 3 are bonded and insulated from each other, so that the current of the piezoelectric ceramic sheet 1 does not flow into the stator 3.

[0027] Furthermore, an insulating protective layer is provided on one side of the piezoelectric ceramic sheet 1 close to the stator 3 and on another side of the stator 1 close to the piezoelectric ceramic 3, respectively, and the piezoelectric ceramic sheet 1 and the stator 3 are bonded and connected by an adhesive 2, and the adhesive 2 can be selected as epoxy adhesive, so as to achieve the bonding connection between the piezoelectric ceramic sheet 1 and the stator 3, and the insulating protective layer is used to prevent the current of the piezoelectric ceramic sheet 1 from passing through the stator 3 and causing interference, thereby avoiding damage to the driving chip and CUP of the driving system.

[0028] It should be noted that in other implementations of the present solution, only one of the side of the piezoelectric ceramic sheet close to the stator and the side of the stator close to the piezoelectric ceramic may be provided with an insulating protective layer.

[0029] To sum up, in this solution, a ground terminal and a positive electrode are provided on the front side of the piezoelectric ceramic sheet, so that the positive electrode and the ground terminal can be connected through the front side when the electrical connection is performed. When voltage is applied to the piezoelectric ceramic sheet, the piezoelectric ceramic sheet can drive the stator elastomer to resonate through its own deformation, so that the current does not need to pass through the stator, thereby avoiding interference of the external circuit to the ceramic sheet drive system, thereby avoiding the problem of damage to the driver chip or CPU.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A piezoelectric ceramic sheet, characterized in that: include: The main body has a plurality of positive electrodes formed on the front side of the main body, a back side grounding terminal is formed on the back side of the main body, a plurality of front side grounding terminals are formed on the front side of the main body, and the front side grounding terminals are electrically connected to the back side grounding terminals, and the front side grounding terminals are located in the area where the piezoelectric ceramic sheet does not provide driving force.

2. The piezoelectric ceramic sheet according to claim 1, characterized in that: The front grounding terminal and the back grounding terminal are both provided with a conductive plating layer.

3. The piezoelectric ceramic sheet according to claim 2, characterized in that: A conductive plating layer is formed on the corresponding side surface of the front grounding terminal to achieve electrical connection between the front grounding terminal and the back grounding terminal.

4. The piezoelectric ceramic sheet according to claim 2 or 3, characterized in that: The conductive plating layer is a silver plating layer.

5. The piezoelectric ceramic sheet according to any one of claims 1 to 3, characterized in that: The number of the front grounding terminals is one or two.

6. The piezoelectric ceramic sheet according to any one of claims 1 to 3, characterized in that: The back grounding terminal covers the entire back surface of the body.

7. A piezoelectric ceramic sheet and stator mounting structure, characterized in that: It comprises a stator and the piezoelectric ceramic sheet according to any one of claims 1 to 6, wherein the piezoelectric ceramic sheet and the stator are bonded and insulated from each other.

8. The piezoelectric ceramic sheet and stator mounting structure according to claim 7, characterized in that: An insulating protective layer is provided on at least one of a side of the piezoelectric ceramic sheet close to the stator and a side of the stator close to the piezoelectric ceramic, and the piezoelectric ceramic sheet is bonded to the stator by adhesive.

9. The piezoelectric ceramic sheet and stator mounting structure according to claim 8, characterized in that: A side of the piezoelectric ceramic sheet close to the stator and a side of the stator close to the piezoelectric ceramic are both provided with an insulating protective layer.

10. The piezoelectric ceramic sheet and stator mounting structure according to claim 8, characterized in that: The adhesive is epoxy adhesive.

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