PCBA onboard trigger signal type electronic lock

Abstract

The PCBA onboard trigger signal type electronic lock comprises an electronic lock bottom shell and an electronic lock top cover fixed to the upper end of the electronic lock bottom shell, a locking button movably penetrates through the right portion of the electronic lock top cover, and springs are connected to the front side and the rear side between the lower end of the locking button and the inner bottom end of the electronic lock bottom shell. According to the PCBA onboard trigger signal type electronic lock, the unlocking signal area, the mechanical switch signal area and the locking signal area are integrally arranged on the PCBA board, and the translation driving assembly, the PCBA board and other components are integrated into a signal switch to be integrally designed in the electronic lock shell, so that the electronic lock is smaller in size and narrower in width; the charging gun body can be made to be smaller and more convenient by replacing a traditional touch switch with contact of the PCBA and the elastic piece, the effects of preventing rain, freezing and sand dust can be achieved in severe weather such as rainy seasons or freezing and the like, and the situation that the locking button and the emergency unlocking button are frozen and cannot be pressed is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic locks, and in particular to a PCBA board-mounted trigger signal type electronic lock. Background Art

[0002] There are more and more new energy vehicles. In order to ensure the safety of people, vehicles and charging piles during charging, the charging gun needs to have certain protection functions. When the charging gun is plugged in, an electronic lock is needed to prevent the charging gun from being accidentally disconnected.

[0003] Currently, the electronic locks on the market are large in size due to the separate design of the mechanical switch and the electronic lock. Because the electronic lock needs to be installed on the charging gun of new energy vehicles, the large size of the electronic lock will make it impossible to make the charging gun smaller and more convenient. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a PCBA board-mounted trigger signal type electronic lock to solve the problems raised in the above background technology.

[0005] A PCBA board-mounted trigger signal electronic lock comprises an electronic lock bottom shell and an electronic lock top cover fixed at the upper end thereof, a locking button movably penetrates the right part of the electronic lock top cover, springs are connected at the front and rear sides between the lower end of the locking button and the bottom end of the electronic lock bottom shell, a translation drive assembly is installed on the left side of the electronic lock bottom shell, a switch shrapnel A is fixed on the upper part of the translation drive assembly, a socket terminal is fixed on the left side of the lower end of the electronic lock bottom shell, a socket is plugged on the upper part of the socket terminal, a PCBA board is fixed on the upper end of the socket, the PCBA board is fixed to the lower end of the electronic lock top cover, an unlocking signal area is provided on the right side of the lower end of the PCBA board, a locking signal area is provided at the lower end of the PCBA board and located on the right side of the unlocking signal area, and the switch shrapnel A is in sliding contact with the unlocking signal area and the locking signal area.

[0006] Preferably, a waterproof silicone ring is provided on the outside of the locking button, and a lower end of the waterproof silicone ring is tightly attached to the upper end of the electronic lock top cover.

[0007] Preferably, the translation drive assembly includes a motor, a screw and an unlocking block. The motor is fixedly mounted on the bottom shell of the electronic lock, the screw is connected to the output end of the motor, the unlocking block is slidably connected to the right side inside the bottom shell of the electronic lock, the screw is threadedly connected to the unlocking block, and the switch spring A is embedded and fixed on the upper end of the unlocking block.

[0008] Preferably, an emergency unlocking button is movably penetrated through the right portion of the electronic lock bottom shell, and the left portion of the emergency unlocking button is connected to the right portion of the unlocking block.

[0009] Preferably, the emergency unlocking button is covered with a second waterproof silicone ring on its exterior, and the second waterproof silicone ring is embedded and fixed to the bottom shell of the electronic lock.

[0010] Preferably, a mechanical switch signal area is provided at the lower end of the PCBA board and in front of the locking signal area, and a switch spring B is provided below the mechanical switch signal area. The front end of the switch spring B is embedded and fixed to the PCBA board, the rear end of the switch spring B is connected to the locking button, and the top of the switch spring B is in contact with the mechanical switch signal area.

[0011] The present invention also discloses a method for configuring a switch spring, comprising the steps of: calculating the maximum force on the switch spring, the length of the switch spring, and the elastic modulus of the switch spring material, and adjusting the geometric dimensions and materials of the spring to ensure that the deflection of the end point meets the preset requirements. Preferably, calculating the maximum force on the switch spring, the length of the switch spring, and the elastic modulus of the switch spring material, and adjusting the geometric dimensions and materials of the spring are specifically:

[0012] First, the inertial force generated by the motor-driven screw and unlocking block of the translation drive assembly is counted, then the force exerted by the spring on the lock button during operation is counted, and then the maximum force on the switch spring is calculated;

[0013] Count the movement range of the unlocking block and determine the length of the switch spring;

[0014] Determination of the elastic modulus of the switch spring material:

[0015] Determine the maximum allowable deflection of the endpoints;

[0016] For the switch spring, the formula for the end point deflection is: F is the maximum force on the switch spring, L is the length of the switch spring, and E is the elastic modulus of the switch spring material. is the section inertia moment of the rectangular cross section, b is the width of the switch spring, and h is the thickness of the switch spring. Substitute the known data into the formula to calculate and adjust the geometric dimensions and materials of the spring to ensure that the deflection of the endpoint meets the preset requirements.

[0017] Beneficial effects of the present invention: the PCBA-mounted trigger signal electronic lock integrates the unlocking signal area, the mechanical switch signal area, and the locking signal area on the PCBA board, and integrates the translation drive assembly, the PCBA board and other components into an integrated design inside the electronic lock housing, and uses the PCBA to contact the spring instead of the traditional touch switch, so that the electronic lock is smaller in size and narrower in width, so that the charging gun body can be made smaller and more convenient, and when the unlocking block is pressed down and stuck, the translation drive assembly can be used to drive the unlocking block to move left and reset, and an emergency unlocking button is provided, which can be manually pressed Press and push the unlocking block to the left to reset it, which serves as an emergency unlocking. In this way, the unlocking block can be prevented from getting stuck when a person touches the gun to draw it. In addition, by setting waterproof silicone ring 1 and waterproof silicone ring 2, it can prevent rain, ice, dust and other severe weather such as rainy season or freezing, and prevent the locking button and the emergency unlocking button from freezing and being unable to be pressed. The integrated design improves the current design of separate mechanical switches and electronic locks, avoids the high-precision installation data requirements for the electric gun hook, deformation and damage to the charging gun hook, and poor working conditions of the charging gun due to poor waterproof and anti-icing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the present invention;

[0019] Figure 2 For the present invention Figure 1 Schematic diagram of removing the bottom shell and top cover of the electronic lock;

[0020] Figure 3 For the present invention Figure 2 Schematic diagram of the lower end;

[0021] Figure 4 For the present invention Figure 1 A schematic diagram of the front view of the electronic lock bottom shell and the electronic lock top cover being removed;

[0022] Figure 5 It is a schematic diagram of the lower end of the PCBA board of the present invention.

[0023] In the figure: 1-electronic lock bottom shell, 2-electronic lock top cover, 3-lock button, 4-waterproof silicone ring 1, 5-emergency unlock button, 6-waterproof silicone ring 2, 7-socket terminal, 8-PCBA board, 9-socket, 10-motor, 11-screw, 12-unlocking block, 13-switch spring A, 14-unlocking signal area, 15-switch spring B, 16-mechanical switch signal area, 17-spring, 18-locking signal area. DETAILED DESCRIPTION

[0024] See also Figure 1-Figure 5, a PCBA-mounted trigger signal electronic lock, comprising an electronic lock bottom shell 1 and an electronic lock top cover 2 fixed at the upper end thereof, a locking button 3 movably penetrates the right part of the electronic lock top cover 2, a spring 17 is connected to the front and rear sides between the lower end of the locking button 3 and the bottom end of the electronic lock bottom shell 1, a translation drive assembly is installed on the left side of the electronic lock bottom shell 1, a switch spring A13 is fixed on the upper part of the translation drive assembly, the translation drive assembly comprises a motor 10, a screw 11 and an unlocking block 12, the motor 10 and The electronic lock bottom shell 1 is fixedly installed, the screw 11 is connected to the output end of the motor 10, the unlocking block 12 is slidably connected to the right side of the electronic lock bottom shell 1, the screw 11 is threadedly connected to the unlocking block 12, and the switch shrapnel A13 is embedded and fixed on the upper end of the unlocking block 12. The motor 10 can drive the screw 11 to rotate. As the screw 11 and the unlocking block 12 are threadedly matched, the unlocking block 12 can move left and right inside the electronic lock bottom shell 1, and the unlocking block 12 drives the switch shrapnel A13 to move left and right;

[0025] The right part of the electronic lock bottom shell 1 is movably penetrated by an emergency unlocking button 5, and the left part of the emergency unlocking button 5 is connected to the right part of the unlocking block 12. When the unlocking block 12 moves left and right, the emergency unlocking button 5 can also be driven to move left and right at the same time. By pressing the emergency unlocking button 5, the unlocking block 12 can be pushed to move to the left, and the screw 11 can be rotated at this time;

[0026] A socket terminal 7 is fixed to the left side of the lower end of the electronic lock bottom shell 1, a socket 9 is plugged into the upper part of the socket terminal 7, a PCBA board 8 is fixed to the upper end of the socket 9, the PCBA board 8 is fixed to the lower end of the electronic lock top cover 2, an unlocking signal area 14 is provided on the right side of the lower end of the PCBA board 8, a locking signal area 18 is provided at the lower end of the PCBA board 8 and located on the right side of the unlocking signal area 14, the switch spring A13 is in sliding contact with the unlocking signal area 14 and the locking signal area 18, when locking, the motor 10 drives the screw 11 to push the unlocking block 1 to the right. 2. The switch spring A13 embedded in the unlocking block 12 moves to the locking signal area 18 to send out a locking signal, and at the same time drives the unlocking block 12 to move to the bottom of the locking button 3 and lock it, so that the locking button 3 cannot be pressed down. When unlocking, the motor 10 drives the screw 11 to retract the unlocking block 12 in the reverse direction. When the switch spring A13 embedded in the unlocking block 12 moves to the unlocking signal area 14 to send out an unlocking signal, the unlocking block 12 is disengaged from the locking button 3, so that the locking button 3 can be pressed down to complete the unlocking. At the same time, the unlocking button of the charging gun can move freely up and down to send out a signal.

[0027] A mechanical switch signal area 16 is provided at the lower end of the PCBA board 8 and in front of the locking signal area 18. A switch spring B15 is provided below the mechanical switch signal area 16. The head end of the switch spring B15 is inlaid and fixed to the PCBA board 8, and the end of the switch spring B15 is connected to the locking button 3. The top of the switch spring B15 contacts the mechanical switch signal area 16. When the locking button 3 cannot be pressed down, the locking button 3 will push the switch spring B15 upward to make the switch spring B15 close to the mechanical switch signal area 16 and maintain the mechanical switch signal emitted by the mechanical switch signal area 16. When the unlocking button of the charging gun is pressed so that the locking button 3 is pressed, the switch spring B15 will be separated from the mechanical switch signal area 16 and the signal will be disconnected. In this way, the unlocking signal area 14, the mechanical switch signal area 16, and the locking signal area 18 are integrated. On the PCBA board 8, the translation drive assembly, PCBA board 8 and other components are integrated into an integrated design inside the electronic lock housing, so that the electronic lock is smaller in size and narrower in width, so that the charging gun body can be made smaller and more convenient, and when the unlocking block 12 is pressed down and stuck, the translation drive assembly can be used to drive the unlocking block 12 to move left and reset. In addition, an emergency unlocking button 5 is provided to manually press and push the unlocking block 12 to move left and reset, which plays an emergency unlocking role. In this way, when a person touches the gun to draw the gun, the unlocking block 12 is prevented from getting stuck. The integrated design improves the design of the separation of mechanical switches and electronic locks on the market, and the use of PCBA and shrapnel contact instead of the traditional touch switch avoids the problems of high precision requirements for the installation data of the electric gun hook, deformation and damage of the charging gun hook, and poor waterproof and anti-icing performance leading to poor working of the charging gun.

[0028] The locking button 3 is externally sleeved with a waterproof silicone ring 4, the lower end of which is tightly attached to the upper end of the electronic lock top cover 2, and the emergency unlocking button 5 is externally sleeved with a waterproof silicone ring 2 6, which is embedded and fixed to the electronic lock bottom shell 1. By arranging the waterproof silicone ring 1 4 and the waterproof silicone ring 2 6, it can prevent rain, ice, and dust in rainy seasons or freezing weather, and prevent the locking button 3 and the emergency unlocking button 5 from freezing and being unable to be pressed.

[0029] In a preferred implementation, a switch spring is configured to ensure that the switch spring is always in reliable contact with the unlocking signal area and the locking signal area during the sliding process. The maximum force on the switch spring, the length of the switch spring, and the elastic modulus of the switch spring material are counted, and the cross-sectional dimensions of the switch spring and the deflection of the endpoints are calculated. By adjusting the geometric dimensions and materials of the spring to ensure that the deflection of the endpoints meets the preset requirements, it can be ensured that under different operating forces and environmental conditions, the switch spring is always in reliable contact with the unlocking signal area and the locking signal area during the sliding process.

[0030] Specific:

[0031] First, the inertial force generated when the motor 10 of the translation drive assembly drives the screw 11 and the unlocking block 12 to move is counted. When the motor 10 starts or stops, the unlocking block 12 will undergo an acceleration or deceleration process. Assuming that the total mass of the unlocking block 12 and its connected parts (including the switch shrapnel A13) can be determined, the maximum acceleration reached by the motor-driven unlocking block during normal unlocking or locking operations can be determined. According to Newton's second law, the inertial force generated thereby can be determined. This inertial force will be transmitted to the switch shrapnel A13.

[0032] Then, the force generated by the spring 17 on the lock button 3 during operation is counted. The elastic coefficient of the spring is known, and the maximum compression of the spring during operation is determined. According to Hooke's law, the maximum elastic force generated by the spring can be determined. Then, the spring force acting on the switch spring A13 can be determined.

[0033] Then calculate the maximum force on the switch spring A13.

[0034] The motion range of the unlocking block 12 is counted, and the length of the switch shrapnel is determined, which slides inside the bottom shell 1 of the electronic lock. The stroke of the unlocking block 12 from the fully unlocked position to the fully locked position can be determined. In order to ensure that the switch shrapnel A13 can reliably contact the unlocking signal area 14 and the locking signal area 18 throughout the entire stroke, the length of the switch shrapnel A13 should be sufficient to cover the stroke range and leave a certain margin. Therefore, the length design of the switch shrapnel A13 can be determined, so that the switch shrapnel A13 can ensure that when the unlocking block 12 moves to the extreme position, it can still have sufficient contact area with the signal area to avoid poor contact. Determination of the elastic modulus of the switch shrapnel material:

[0035] For example, considering the performance and use environment of the switch shrapnel, beryllium bronze is selected as the material of the switch shrapnel. Beryllium bronze has high elasticity, good conductivity and corrosion resistance, and its elastic modulus can be determined to meet the elastic requirements of the switch shrapnel in long-term use. It also has good corrosion resistance in the environment where the electronic lock may be located, which may be humid and contain chemical substances, ensuring the reliability and stability of the electronic lock.

[0036] In order to ensure that the switch spring A13 can reliably contact the signal area under various operating conditions, the maximum allowable deflection of the end point is first determined. This deflection range can ensure that the switch spring will not cause abnormal signal transmission due to excessive deformation when deformed by force.

[0037] Calculate the cross-sectional dimensions according to the material mechanics formula:

[0038] For the switch spring A13, the formula for its end point deflection is: F is the maximum force on the switch spring A13, L is the length of the switch spring, E is the elastic modulus of the switch spring material, is the section inertia moment of the rectangular cross section, b is the width of the switch spring, and h is the thickness of the switch spring. Substitute the known data into the formula to calculate and adjust the geometric dimensions and materials of the spring to ensure that the deflection of the endpoint meets the preset requirements.

[0039] The PCBA onboard trigger signal type electronic lock disclosed in the present invention has the following significant technical effects:

[0040] 1. Space optimization effect:

[0041] By integrating the unlocking signal area, mechanical switch signal area, and locking signal area on the PCBA board, and integrating the translation drive assembly, PCBA board and other key components into an integrated design inside the electronic lock housing, a highly integrated electronic lock structure is achieved. This integrated design greatly reduces the size of the electronic lock and makes it narrower. Compared with existing electronic locks on the market, since the separate design of the mechanical switch and the electronic lock is avoided, it provides the possibility of miniaturization of the charging gun for new energy vehicles, significantly improving the problem that the charging gun body cannot be made smaller and more convenient due to the large size of traditional electronic locks, and helps to improve the overall compactness and aesthetics of the new energy vehicle charging system.

[0042] 2. Improved operational convenience and reliability:

[0043] The use of PCBA and spring contact to replace the traditional touch switch not only helps to reduce the size of the electronic lock, but also improves the reliability of signal triggering and the stability of operation.

[0044] When the unlocking block is pressed down and stuck during operation, the electronic lock of the present invention has an effective response mechanism. The translation drive assembly can drive the unlocking block to move left and reset, ensuring that the unlocking function can still return to normal under abnormal circumstances. At the same time, the emergency unlocking button can be manually pressed and push the unlocking block to move left and reset, further enhancing the emergency handling capability of the system. This design can effectively prevent the unlocking block from getting stuck during the operation of drawing the gun by hand, ensuring that the user can successfully complete the unlocking operation during normal use and when unexpected situations occur, greatly improving the convenience and reliability of the electronic lock operation. 3. Environmental adaptability effect:

[0045] The protection against bad weather is significantly enhanced. In extreme environments such as rainy season or freezing, by setting waterproof silicone ring 1 on the outside of the lock button and waterproof silicone ring 2 on the outside of the emergency unlock button, rain and dust can be effectively prevented from entering the electronic lock. At the same time, the design of waterproof silicone ring 1 and waterproof silicone ring 2 can avoid the problem of component freezing caused by environmental factors, prevent the lock button and emergency unlock button from freezing and being unable to be pressed, ensure that the electronic lock can work normally under different climatic conditions, improve the environmental adaptability of the electronic lock, and ensure the safety and stability of the new energy vehicle charging system under various weather conditions.

[0046] 4. Signal transmission and control effect:

[0047] During the operation of the electronic lock, such as locking and unlocking actions, the signal transmission and triggering are accurate and stable through the precise control of the translation drive assembly.

[0048] When locking, the motor drives the screw to push the unlocking block to the right, and the switch spring A embedded in the unlocking block runs to the locking signal area, sending out a locking signal and locking the locking button at the same time, ensuring that the charging gun is locked during charging; when unlocking, the motor drives the screw in reverse to retract the unlocking block, and the switch spring A runs to the unlocking signal area and sends out an unlocking signal, so that the locking button can be released, allowing the unlocking button of the charging gun to move freely and send out a signal.

[0049] For the mechanical switch signal area, through the ingenious connection between the switch spring B and the lock button, the mechanical switch signal can be accurately maintained or cut off when the lock button is in different states. When the unlock button of the charging gun is pressed, causing the lock button to be pressed, the switch spring B will separate from the mechanical switch signal area and disconnect the signal, ensuring the consistency of signal transmission and operating status, ensuring the clear signal control logic of the entire electronic lock, and avoiding the problem of poor operation of the charging gun due to abnormal signal transmission.

[0050] 5. Switch shrapnel configuration optimization effect:

[0051] In terms of the configuration of the switch spring, the present invention adopts a scientific method to ensure its reliable performance.

[0052] By accurately counting the various forces on the switch shrapnel, including the inertial force generated by the motor drive component of the translation drive assembly during movement, and the force generated by the spring on the lock button during operation and transmitted to the switch shrapnel, and comprehensively considering external interference factors, the maximum force on the switch shrapnel is accurately calculated to ensure a clear grasp of its force conditions under different operating conditions. According to the range of motion of the unlocking block, the length of the switch shrapnel is reasonably determined to ensure that the switch shrapnel can completely cover the effective travel range of the unlocking signal area and the locking signal area, and at the same time reserve a margin to avoid poor contact caused by the movement travel exceeding the length of the shrapnel.

[0053] The maximum allowable deflection of the endpoint is set, and the material mechanics formula is used to accurately calculate and adjust the cross-sectional dimensions (including width and thickness) of the switch shrapnel according to parameters such as the maximum force, shrapnel length, and elastic modulus, to ensure that the deflection of the endpoints of the switch shrapnel can meet the preset requirements under various operating forces and environmental conditions, thereby ensuring that the switch shrapnel is always in reliable contact with the unlocking signal area and the locking signal area during the sliding process, optimizing the reliability and stability of the signal triggering, and further improving the overall performance and reliability of the electronic lock.

[0054] In summary, the PCBA onboard trigger signal electronic lock of the present invention has demonstrated excellent technical effects in many aspects such as space optimization, operational convenience, environmental adaptability, signal transmission control and reliability of switch shrapnel through innovative structural design and component configuration. It provides a more superior solution for the application of electronic locks in new energy vehicle charging guns, effectively solves many problems existing in the prior art, improves the safety and reliability of new energy vehicle charging systems, and enhances user experience.

Claims

1. A PCBA-mounted trigger signal type electronic lock, comprising an electronic lock bottom shell (1) and an electronic lock top cover (2) fixed on the upper end thereof, characterized in that: A locking button (3) is movably penetrated through the right part of the electronic lock top cover (2), and a spring (17) is connected between the lower end of the locking button (3) and the bottom end of the electronic lock bottom shell (1) at both sides, and a translation drive assembly is installed on the left side of the inside of the electronic lock bottom shell (1), and a switch spring A (13) is fixed on the upper part of the translation drive assembly, and a socket terminal (7) is fixed on the left side of the lower end of the electronic lock bottom shell (1), and a socket (9) is plugged into the upper part of the socket terminal (7), and a PCBA board (8) is fixed on the upper end of the socket (9), and the PCBA board (8) is fixed to the lower end of the electronic lock top cover (2), and an unlocking signal area (14) is provided on the right side of the lower end of the PCBA board (8), and a locking signal area (18) is provided on the lower end of the PCBA board (8) and located on the right side of the unlocking signal area (14), and the switch spring A (13) is in sliding contact with the unlocking signal area (14) and the locking signal area (18).

2. The PCBA board-mounted trigger signal electronic lock according to claim 1, characterized in that: The locking button (3) is externally sleeved with a waterproof silicone ring (4), and the lower end of the waterproof silicone ring (4) is tightly attached to the upper end of the electronic lock top cover (2).

3. The PCBA board-mounted trigger signal electronic lock according to claim 1, characterized in that: The translation drive assembly comprises a motor (10), a screw rod (11) and an unlocking block (12); the motor (10) is fixedly mounted on the electronic lock bottom shell (1); the screw rod (11) is connected to the output end of the motor (10); the unlocking block (12) is slidably connected to the right side inside the electronic lock bottom shell (1); the screw rod (11) is threadedly connected to the unlocking block (12); and the switch spring A (13) is embedded and fixed on the upper end of the unlocking block (12).

4. The PCBA-mounted trigger signal electronic lock according to claim 3, characterized in that: An emergency unlocking button (5) is movably inserted through the right part of the electronic lock bottom shell (1), and the left part of the emergency unlocking button (5) is connected to the right part of the unlocking block (12).

5. The PCBA board-mounted trigger signal electronic lock according to claim 4, characterized in that: The emergency unlocking button (5) is externally sleeved with a second waterproof silicone ring (6), and the second waterproof silicone ring (6) is embedded and fixed to the electronic lock bottom shell (1).

6. The PCBA board-mounted trigger signal electronic lock according to claim 1, characterized in that: A mechanical switch signal area (16) is provided at the lower end of the PCBA board (8) and in front of the locking signal area (18); a switch spring B (15) is provided below the mechanical switch signal area (16); a front end of the switch spring B (15) is embedded and fixed to the PCBA board (8); a rear end of the switch spring B (15) is connected to the locking button (3); and a top of the switch spring B (15) is in contact with the mechanical switch signal area (16).

7. The method for configuring a switch spring in a PCBA-mounted trigger signal electronic lock according to claim 1, characterized in that: The method comprises the following steps: calculating the maximum force acting on the switch spring piece, the length of the switch spring piece, and the elastic modulus of the switch spring piece material, and adjusting the geometric dimensions and material of the spring piece to ensure that the deflection of the end point meets the preset requirements.

8. The method for configuring a switch spring in a PCBA-mounted trigger signal electronic lock according to claim 7, characterized in that: Count the maximum force on the switch spring, the length of the switch spring, and the elastic modulus of the switch spring material, and adjust the geometric dimensions and material of the spring: First, the inertial force generated by the motor-driven screw and unlocking block of the translation drive assembly is counted, then the force exerted by the spring on the lock button during operation is counted, and then the maximum force on the switch spring is calculated; Count the movement range of the unlocking block and determine the length of the switch spring; Determination of the elastic modulus of the switch spring material: Determine the maximum allowable deflection of the endpoints; For the switch spring, the formula for the end point deflection is: F is the maximum force on the switch spring, L is the length of the switch spring, and E is the elastic modulus of the switch spring material. is the section inertia moment of the rectangular cross section, b is the width of the switch spring, and h is the thickness of the switch spring. Substitute the known data into the formula to calculate and adjust the geometric dimensions and materials of the spring to ensure that the deflection of the endpoint meets the preset requirements.

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