Connecting piece for piezoelectric element and piezoelectric pump thereof

Abstract

The connecting piece comprises a first connecting module used for connecting the piezoelectric element and a second connecting module used for connecting a pump membrane, the first connecting module comprises a supporting arm, first side walls and first pressing arms, the number of the first pressing arms is two, the number of the first side walls is two, and the number of the second pressing arms is two. One first pressing arm is arranged at one end of the supporting arm through one first side wall, the other first pressing arm is arranged at the other end of the supporting arm through the other first side wall, the two first pressing arms are projected in the direction perpendicular to the upper surface of the supporting arm, and the projection falls in the upper surface of the supporting arm; and a clamping opening is formed among the two first pressing arms, the two first side walls and the supporting arm. According to the scheme, the transmission efficiency of the connecting piece during working can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of piezoelectric pump technology, specifically to a connector for piezoelectric elements and a piezoelectric pump thereof. Background Technology

[0002] The connector is used to connect the piezoelectric element and the pump diaphragm. The piezoelectric element oscillates slightly under voltage, and the connector transmits the vertical displacement generated by this oscillation to the pump diaphragm, enabling pumping of the liquid by lifting or pushing the diaphragm. Existing connectors are thin strips of stainless steel. These connectors are attached to the piezoelectric element with adhesive, which makes them prone to detachment during use. Furthermore, the adhesive is susceptible to cracking during high and low temperature storage, and the left and right sides of the piezoelectric element cannot be positioned or restrained, thus affecting the operation of the piezoelectric pump.

[0003] Furthermore, existing connectors are prone to deformation under stress during operation and suffer from low transmission efficiency. For example, a Chinese patent (CN102667158B) entitled "Flexible Element for a Micropump" includes a flexible diaphragm, a pressure chamber, and a plug plate. The pressure chamber communicates with the outside, for example, via the flexible diaphragm. The diaphragm is further fixed to an actuator located outside the micropump. The diaphragm is fixed to the actuator by at least one strip-shaped element, which is rigid along its main axis but flexible in the direction perpendicular to its main axis. This design uses a strip-shaped connector, which is prone to cracking and detachment, deformation, and low transmission efficiency.

[0004] Therefore, the technical problem that this application needs to solve is: how to improve the transmission efficiency of the connector. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model proposes a connector for piezoelectric elements and a piezoelectric pump thereof. This solution positions or limits the left and right sides of the piezoelectric element through two first sidewalls, and clamps the piezoelectric element through a first clamping arm, effectively preventing the connector from falling off. Furthermore, compared to the strip-shaped elements of the prior art, this solution has the characteristic of high structural strength. Therefore, the connector in this solution is not easily deformed during operation, effectively improving the transmission efficiency of the connector during operation.

[0006] Specifically, this utility model proposes a connector for piezoelectric elements, including a first connecting module for connecting piezoelectric elements and a second connecting module for connecting pump membranes. The first connecting module includes a support arm, a first sidewall, and a first clamping arm. There are two first clamping arms and two first sidewalls. One first clamping arm is disposed at one end of the support arm through one first sidewall, and the other first clamping arm is disposed at the other end of the support arm through the other first sidewall. The projection of the two first clamping arms along a direction perpendicular to the upper surface of the support arm falls within the upper surface of the support arm, and a clamping opening is formed between the two first clamping arms, the two first sidewalls, and the support arm.

[0007] Furthermore, the first connecting module and the second connecting module are welded together and fixed, and the second connecting module is a rigid structure.

[0008] Preferably, the end of the first clamping arm is provided with a first guide portion, the first guide portion is located at the entrance of the clamping port, and the end of the first guide portion away from the first clamping arm extends upward for mounting the piezoelectric element into the clamping port.

[0009] Preferably, the first connection module further includes a second clamping arm, which is disposed on the support arm via a second sidewall, and the second sidewall is used to block the end of the piezoelectric element, and the second clamping arm is used to clamp the piezoelectric element.

[0010] Preferably, the end of the second clamping arm away from the second sidewall is provided with a second guide portion, and the end of the second guide portion away from the second sidewall extends upward for mounting the piezoelectric element between the second clamping arm and the support arm.

[0011] Preferably, the first connecting module is provided with a clearance opening for accommodating the second clamping arm, the clearance opening being disposed on the first clamping arm, or the clearance opening being disposed on the first clamping arm and the first side wall.

[0012] Preferably, a notch is provided in the middle of the second sidewall.

[0013] Preferably, the first connecting module is integrally formed.

[0014] Preferably, the first connecting module is formed by stamping and bending.

[0015] Preferably, the second connecting module is fixed to the lower end of the support arm by a bending portion.

[0016] Preferably, the cross-section of the second connecting module along the direction perpendicular to its own height is C-shaped, semi-circular, circular, or triangular, etc.

[0017] In addition, this application also proposes a piezoelectric pump that includes the aforementioned piezoelectric element connector. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the connector for the piezoelectric element in Embodiment 1;

[0020] Figure 2 This is a three-dimensional structural diagram of the connector for the piezoelectric element in Embodiment 2;

[0021] Figure 3 This is a three-dimensional structural diagram of the connector for the piezoelectric element in Embodiment 3;

[0022] Figure 4 This is a schematic diagram of the assembly between the piezoelectric element and the connector.

[0023] The reference numerals used in the attached figures are as follows:

[0024] 11-First connecting module; 12-Support arm; 13-First sidewall; 14-First clamping arm; 15-Clamping port; 16-First guide part; 17-Second clamping arm; 18-Second sidewall; 19-Piezoelectric element; 20-Second guide part; 21-Avoidance port; 22-Notch; 23-Bending part; 24-Second connecting module. Detailed Implementation

[0025] The technical solutions of this application will be further described below with reference to specific embodiments, but this application is not limited to these embodiments.

[0026] Example 1

[0027] like Figure 4 As shown, this embodiment proposes a connector for piezoelectric elements, including a first connecting module 11 for connecting a piezoelectric element 19 and a second connecting module 24 for connecting a pump diaphragm. Figure 1 As shown, the first connecting module 11 includes a support arm 12, a first sidewall 13, and a first clamping arm 14. There are two first clamping arms 14 and two first sidewalls 13. One first clamping arm 14 is disposed at one end of the support arm 12 through one first sidewall 13, and the other first clamping arm 14 is disposed at the other end of the support arm 12 through the other first sidewall 13. The projection of the two first clamping arms 14 along a direction perpendicular to the upper surface of the support arm 12 falls within the upper surface of the support arm 12, and a clamping opening 15 is formed between the two first clamping arms 14, the two first sidewalls 13, and the support arm 12.

[0028] The technical advantages of this solution are as follows: the piezoelectric element 19 is positioned or limited on the left and right sides by the two first side walls 13, and the piezoelectric element 19 is pressed by the first clamping arm 14, which can effectively prevent the connector from falling off. Moreover, compared with the strip-shaped element of the prior art, this solution has the feature of high structural strength. Therefore, the connector in this solution is not easy to deform during operation, which effectively improves the transmission efficiency of the connector during operation.

[0029] Furthermore, the first connecting module 11 and the second connecting module 24 are welded and fixed together, and the second connecting module 24 is a rigid structure. In this design, the first connecting module 11 and the second connecting module 24 are rigid structures, which can reduce kinetic energy loss during transmission and effectively improve transmission efficiency.

[0030] Furthermore, the first connecting module 11 and the piezoelectric element 19 are fixed together by adhesive dispensing. The technical effect of this solution is that the connection strength between the first connecting module 11 and the piezoelectric element 19 is improved through the combined action of clamping and adhesive dispensing.

[0031] As one embodiment of this example, the end of the first clamping arm 14 is provided with a first guide portion 16. The first guide portion 16 is located at the entrance of the clamping port 15, and the end of the first guide portion 16 away from the first clamping arm 14 extends upward to allow the piezoelectric element 19 to be installed into the clamping port 15.

[0032] The guide surface of the first guide section 16 is an inclined surface or a curved surface, which makes it easier for the piezoelectric element 19 to be installed into the clamping port 15.

[0033] Example 2

[0034] like Figure 3 As shown, this embodiment adds a second pressing arm 17 to the embodiment 1. The second pressing arm 17 is mounted on the support arm 12 through a second side wall 18, and the second side wall 18 is used to block the end of the piezoelectric element 19. The second pressing arm 17 is used to press the piezoelectric element 19.

[0035] The technical advantages of this solution are: it enhances the structural strength of the first connecting module 11 and the second connecting module 24, and reduces the deformation of the second connecting module 24 due to tensile forces during movement. It also further improves the transmission efficiency of the piezoelectric element 19.

[0036] As one embodiment of this invention, a second guide portion 20 is provided at one end of the second clamping arm 17 away from the second sidewall 18. The second guide portion 20 extends upward at one end away from the second sidewall 18 to allow the piezoelectric element 19 to be installed between the second clamping arm 17 and the support arm 12.

[0037] Furthermore, the first connecting module 11 is provided with a clearance opening 21 for accommodating the second clamping arm 17, and the clearance opening 21 is provided on the first clamping arm 14 and the first side wall 13.

[0038] Example 3

[0039] like Figure 2 As shown, the difference between this embodiment and embodiment 2 is that the location of the clearance opening has been changed. In this embodiment, the clearance opening 21 is located on the first clamping arm 14.

[0040] In terms of improvement effect, Example 3 has higher transmission efficiency or structural strength. The transmission efficiency of piezoelectric element 19 in the three examples is: Example 3 > Example 2 > Example 1.

[0041] In addition, this solution has been improved based on embodiments 1 to 3, as follows:

[0042] Furthermore, a notch 22 is provided in the middle of the second sidewall 18. The notch 22 in this design is used to reduce the weight of the second sidewall 18 and reduce transmission energy consumption.

[0043] Furthermore, the first connection module 11 is designed to be integrally formed.

[0044] Furthermore, the first connecting module 11 is formed by stamping and bending.

[0045] Furthermore, the second connecting module 24 is welded and fixed to the lower end of the support arm 12 via the bending portion 23. The bending portion 23 serves as a transition and connection, used to decompose the force between the support arm 12 and the second connecting module 24, thereby improving the stability of the second connecting module 24 during operation.

[0046] Furthermore, the second connecting module 24 is welded and installed at the lower end of the support arm 12.

[0047] As one implementation of this embodiment, the cross-section of the second connecting module 24 along the direction perpendicular to its own height is C-shaped, semi-circular, circular, or triangular, etc. This embodiment is not intended to limit the specific structure of the second connecting module 24. In addition, the second connecting module 24 in this solution can also adopt other structures in the prior art.

[0048] In addition, this solution also proposes a piezoelectric pump that includes the piezoelectric element connectors described in embodiments 1 to 3 above. The piezoelectric pump in this solution has the advantages of long service life and high transmission efficiency.

[0049] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A connector for a piezoelectric element, comprising a first connecting module (11) for connecting a piezoelectric element (19) and a second connecting module (24) for connecting a pump diaphragm, characterized in that, The first connecting module (11) includes a support arm (12), a first side wall (13), and a first clamping arm (14). There are two first clamping arms (14) and two first side walls (13). One first clamping arm (14) is disposed at one end of the support arm (12) through one first side wall (13), and the other first clamping arm (14) is disposed at the other end of the support arm (12) through the other first side wall (13). The projection of the two first clamping arms (14) along a direction perpendicular to the upper surface of the support arm (12) falls within the upper surface of the support arm (12), and a clamping opening (15) is formed between the two first clamping arms (14), the two first side walls (13), and the support arm (12).

2. The connector for piezoelectric elements according to claim 1, characterized in that, The first connecting module (11) and the second connecting module (24) are welded and fixed together, and the second connecting module (24) is a rigid structure.

3. The connector for a piezoelectric element according to claim 1 or 2, characterized in that, The end of the first clamping arm (14) is provided with a first guide portion (16), the first guide portion (16) is located at the entrance of the clamping port (15), and the end of the first guide portion (16) away from the first clamping arm (14) extends upward for installing the piezoelectric element (19) into the clamping port (15).

4. The connector for piezoelectric elements according to claim 3, characterized in that, The first connection module (11) further includes a second clamping arm (17), which is disposed on the support arm (12) via a second side wall (18), and the second side wall (18) is used to block the end of the piezoelectric element (19), and the second clamping arm (17) is used to clamp the piezoelectric element (19).

5. The connector for piezoelectric elements according to claim 4, characterized in that, The second clamping arm (17) has a second guide portion (20) at one end away from the second side wall (18). The second guide portion (20) extends upward at one end away from the second side wall (18) to allow the piezoelectric element (19) to be installed between the second clamping arm (17) and the support arm (12).

6. The connector for piezoelectric elements according to claim 5, characterized in that, The first connecting module (11) is provided with a clearance opening (21) for accommodating the second pressing arm (17). The clearance opening (21) is provided on the first pressing arm (14), or the clearance opening (21) is provided on the first pressing arm (14) and the first side wall (13).

7. The connector for a piezoelectric element according to any one of claims 1 to 6, characterized in that, The first connection module (11) is integrally formed.

8. The connector for piezoelectric elements according to claim 7, characterized in that, The first connecting module (11) is formed by stamping and bending.

9. The connector for a piezoelectric element according to any one of claims 1 to 6, characterized in that, The second connecting module (24) is fixed to the lower end of the support arm (12) by a bending part (23).

10. A piezoelectric pump, characterized in that, Includes a connector for a piezoelectric element as described in any one of claims 1 to 9.

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