Button cell holder testing device and button cell holder production line

Abstract

The utility model discloses a button cell holder testing device and a button cell holder production line. The button cell holder testing device comprises a support, a driving assembly, a pressure head assembly and a pressure detection member. The bracket is provided with a mounting position which is used for placing a button battery holder; the driving assembly comprises an ejector rod which is movably connected with the support. The pressure head assembly is connected to one end, facing the mounting position, of the ejector rod and is used for pressing a negative elastic sheet of the button battery holder along a set direction; the pressure detection piece is connected to the pressure head assembly and used for detecting the value of pressure borne by the pressure head assembly in the set direction. The driving assembly is arranged to drive the pressing head assembly to press downwards, the installation process that the button battery is installed on the button battery holder is simulated, the pressure value fed back by the negative electrode elastic piece is detected through the pressure detection piece in the pressing process so as to determine the welding quality of the negative electrode elastic piece, detection is completed in an automatic mode, the detection efficiency is high, and the error detection probability is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to button cell holder production technical field, especially in button cell holder testing arrangement and button cell holder production line. BACKGROUND

[0002] Button cell holder is usually welded on the PCB board, which is used for installing button cell to power the electrical components on the PCB board. In the production process of button cell holder, the contact spring (positive spring or negative spring) of button cell holder is prone to defects such as virtual welding, missing welding and empty welding. These defects may cause poor connection of button cell, unstable current, battery heating and even short circuit and other serious consequences.

[0003] There is no special testing equipment for the welding quality of the contact spring of button cell holder on the market, and manual detection has the problem of low efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims at at least solving one of the technical problems existing in the prior art. To this end, the utility model provides a button cell holder testing device and a button cell holder production line, which can drive the pressure head assembly to press the negative spring through the driving assembly, and the pressure detection piece detects the rebound force of the negative spring to determine the welding quality of the negative spring.

[0005] On the one hand, the utility model embodiment provides a button cell holder testing device for testing button cell holder, which comprises:

[0006] A support is provided with a mounting position for placing the button cell holder;

[0007] A driving assembly comprises a jack, which is movably connected with the support;

[0008] A pressure head assembly is connected to one end of the jack towards the mounting position, which is used to press the negative spring of the button cell holder along the set direction;

[0009] A pressure detection piece is connected to the pressure head assembly, which is used to detect the pressure value of the pressure head assembly along the set direction.

[0010] The utility model embodiment has at least the following beneficial effects: the driving assembly is arranged to drive the pressure head assembly to press down, the installation process of the button cell installed to the button cell holder is simulated, and the pressure value fed back by the negative spring is detected by using the pressure detection piece during the pressing process, so as to determine the welding quality of the negative spring. The detection is completed in an automatic way, the detection efficiency is high, and the probability of false detection is low.

[0011] According to some embodiments of the utility model, the pressure head assembly comprises a pressing block group and a conductive contact piece arranged in sequence along a set direction.

[0012] The pressure head assembly is adapted to switch between a loosening position and a pressing position, the loosening position being a position where the conductive contact piece does not press against the positive and negative elastic sheets of the button cell holder, and the pressing position being a position where the conductive contact piece presses against the positive and negative elastic sheets of the button cell holder.

[0013] According to some embodiments of the utility model, the conductive contact piece is a contact sheet, the contact sheet comprising a fixed portion and an elastic sheet portion, the fixed portion being connected to the pressing block group, and the fixed portion being used to abut against the negative elastic sheet of the button cell holder; the elastic sheet portion extends from the edge of the fixed portion at a set angle away from the set direction, and the elastic sheet portion is used to abut against the positive elastic sheet of the button cell holder.

[0014] According to some embodiments of the utility model, the fixed portion is detachably connected to the pressing block group.

[0015] According to some embodiments of the utility model, the pressing block group comprises a push block and a floating block arranged in sequence along the set direction, the push block being connected to the top rod, the floating block being connected to the conductive contact piece, and the push block being connected to the floating block with an installation gap therebetween.

[0016] The pressure detection piece is a thin film type pressure sensor, the thin film type pressure sensor being installed in the installation gap, and the two ends of the pressure detection piece abutting against the push block and the floating block respectively.

[0017] According to some embodiments of the utility model, the bracket further comprises a fixed seat and a guide column, the guide column extending along the set direction and being fixedly connected to the fixed seat, and the pressure head assembly being provided with a guide hole corresponding to the guide column.

[0018] According to some embodiments of the utility model, the driving assembly comprises at least three guide columns, and the three guide columns are arranged around the top rod.

[0019] According to some embodiments of the utility model, the driving assembly further comprises a push-pull electromagnet, the push-pull electromagnet comprising an electromagnetic coil and a push-pull rod, the electromagnetic coil being sleeved on the outer periphery of the push-pull rod, and the push-pull rod being connected to the top rod.

[0020] According to some embodiments of the utility model, the button cell holder testing device further comprises a leakage-proof sleeve, the leakage-proof sleeve being sealingly connected to the fixed seat and surrounding a sealed space, and the push-pull electromagnet being arranged in the sealed space.

[0021] According to a second aspect of the present invention, a button battery holder production line includes a button battery holder testing device as described above.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is an exploded view of the button battery holder testing device according to an embodiment of the present invention;

[0025] Figure 2 This is a top view of the button battery holder testing device according to an embodiment of the present invention;

[0026] Figure 3 yes Figure 2 A sectional view along section line AA;

[0027] Figure 4 This is a schematic diagram of the contact piece and the button battery holder of the button battery holder testing device according to an embodiment of the present invention.

[0028] Figure label:

[0029] 100. Bracket; 110. Mounting base; 120. Guide post;

[0030] 200. Drive assembly; 210. Push rod; 220. Push-pull electromagnet; 221. Push-pull rod; 222. Return spring;

[0031] 300, Pressure head assembly; 310, Pressure block assembly; 311, Push block; 312, Floating block; 320, Conductive contact; 321, Contact piece; 3211, Fixing part; 3212, Spring piece part; 330, Guide hole;

[0032] 400. Pressure testing components;

[0033] 500. Leak-proof sleeve; 510. Sealed space;

[0034] 900. Button battery holder; 910. Positive electrode spring; 920. Negative electrode spring; 930. Button battery base; 931. Button battery placement slot. Detailed Implementation

[0035] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0036] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0037] In the description of the present application, the meaning of "several" is one or more, the meaning of "multiple" is two or more, greater than, less than, more than, etc. are understood as not including the number, "above", "below", "within", etc. are understood as including the number. If it is described as "first", "second", etc. is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0038] In the description of the present application, unless otherwise explicitly limited, the words "set", "install", "connect", etc. should be broadly understood, and the skilled person in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0039] In the following embodiments, the "set direction" is the direction from top to bottom in the drawings. Of course, based on the spatial arrangement of the New York battery holder test device, the set direction can also be other directions in the spatial position, which is not limited here.

[0040] Please refer to Figure 1 On the one hand, the embodiment of the present application provides a button battery holder test device for testing a button battery holder, the button battery holder test device comprising a bracket 100, a driving assembly 200, a pressure head assembly 300 and a pressure detection piece 400; the bracket 100 is provided with a mounting position for placing the button battery holder 900; the driving assembly 200 comprises a top rod 210, the top rod 210 is movably connected with the bracket 100; the pressure head assembly 300 is connected to one end of the top rod 210 facing the mounting position, and is used for pressing the negative spring sheet 920 of the button battery holder 900 along the set direction; the pressure detection piece 400 is connected to the pressure head assembly 300, and is used for detecting the pressure value of the pressure head assembly 300 along the set direction.

[0041] Before explaining the working principle of the button cell holder test device of the present application, the button cell holder 900 adapted by the present application needs to be explained, combined with Figure 4 As shown in the figure, the button cell holder 900 includes a button cell base 930, which is provided with a button cell placing groove 931, and the bottom of the button cell groove is provided with a negative spring piece 920 and a positive spring piece 910. The negative spring piece 920 extends upward from the bottom of the button cell placing groove 931 and is adapted to be pressed by the negative electrode of the button cell. The positive spring piece 910 is arranged on the side wall of the button cell placing groove 931 and is located on the two sides of the cell placing groove (left and right sides in the embodiment) respectively with the negative spring piece 920. The positive spring piece 910 includes two arc-shaped spring pieces arranged symmetrically along the left-right direction, which are used to embrace the side wall of the button cell to clamp and fix the button cell with the side wall of the cell placing groove. Figure 4

[0042] When the staff needs to test the welding stability of the negative spring piece 920 of the button cell holder 900, the button cell holder 900 is placed in the mounting position of the bracket 100, the top rod 210 of the driving assembly 200 drives the pressure head assembly 300 to move downward, the pressure head assembly 300 gradually abuts against the negative spring piece 920, until the pressure head assembly 300 moves to the set position (the position for simulating the insertion depth of the button cell), the negative spring piece 920 is pressed and generates a reaction force to the pressure head assembly 300, the pressure value of the spring piece is the same as the reaction force, and the pressure detection piece 400 connected to the pressure head assembly 300 detects the pressure value.

[0043] It should be noted that in order to realize stable power supply of the button cell, the negative spring piece 920 of the button cell holder 900 needs to ensure stable connection with the button cell. When the negative spring piece 920 of the button cell holder 900 is welded on the button cell base 930, the welding quality has an important influence on the stability of the connection. For example, when the negative spring piece 920 is virtual welded, the negative spring piece 920 cannot be stably connected to the button cell base 930 during the pressing process, and the pressure value detected by the pressure detection piece 400 is less than the lower limit of the set pressure value interval. When the negative spring piece 920 has poor welding quality and causes excessive height difference in the up-down direction, it will affect the installation of the button cell. During the pressing process of the excessively high negative spring piece 920, the pressure value detected by the pressure detection piece 400 will exceed the upper limit of the pressure set value interval. During the pressing process of the excessively low negative spring piece 920, the pressure value detected by the pressure detection piece 400 will be lower than the lower limit of the pressure set value interval.

[0044] ​According to the button cell seat testing device provided in the embodiment of the present application, the driving assembly 200 is arranged to drive the pressure head assembly 300 to press down, the mounting process of the button cell to the button cell seat 900 is simulated, and the pressure detection piece 400 is used to detect the pressure value fed back by the negative spring piece 920 in the pressing process, so that the welding quality of the negative spring piece 920 is determined, and the detection is completed in an automatic manner, and the detection efficiency is high and the probability of false detection is low.

[0045] According to some embodiments of the present application, as shown in Figures 1 to 3 The pressure head assembly 300 includes a pressing block group 310 and a conductive contact piece 320 arranged in sequence in a set direction; the pressure head assembly 300 is adapted to switch between a loosening position and a pressing position, the loosening position being a position where the conductive contact piece 320 does not press the positive spring piece 910 and the negative spring piece 920 of the button cell seat 900, and the pressing position being a position where the conductive contact piece 320 presses the positive spring piece 910 and the negative spring piece 920 of the button cell seat 900.

[0046] In this embodiment, after the pressure head assembly 300 moves from the loosening position to the pressing position, the conductive contact piece 320 connects the positive spring piece 910 and the negative spring piece 920, and a short circuit is formed between the positive spring piece 910 and the negative spring piece 920, and a short circuit signal is obtained to indicate that the positive spring piece 910 and the negative spring piece 920 are normally welded to the button cell base 930. By arranging the conductive contact piece 320, the welding quality of the negative spring piece 920 and the positive spring piece 910 can be detected at the same time, and the quality detection efficiency of the button cell seat 900 is effectively improved.

[0047] In this embodiment, based on different specifications of the button cell seat 900 (the relative height of the negative spring piece 920 and the positive spring piece 910 to the ground and the relative height between the two are different), the shape of the conductive contact piece 320 can be adaptively adjusted to ensure that the conductive contact piece 320 can contact the positive spring piece 910 and the negative spring piece 920 at the same time when the pressure head assembly 300 is in the pressing position, thereby avoiding false detection.

[0048] According to some embodiments of the present application, as shown in Figures 1 to 4 To facilitate display, Figure 4 only the structure of the conductive contact piece 320 and the button cell seat 900 is shown in this embodiment. In this embodiment, the conductive contact piece 320 is a contact piece 321, the contact piece 321 includes a fixed portion 3211 and a spring portion 3212, the fixed portion 3211 is connected with the pressing block group 310, and the fixed portion 3211 is used to abut against the negative spring piece 920 of the button cell seat 900; the spring portion 3212 extends from the edge of the fixed portion 3211 to the set direction at a set angle, and the spring portion 3212 is used to abut against the positive spring piece 910 of the button cell seat 900.

[0049] In this embodiment,Figure 4 As shown, it should be noted that during the process of loading the button cell into the button cell seat 900, the bottom of the button cell will abut against the negative spring sheet 920, and in the embodiment, the fixed part 3211 is used to simulate the bottom of the button cell; and the sidewall of the button cell abuts against the positive spring sheet 910, and the whole button cell moves from left to right under the push of the positive spring sheet 910, so as to be clamped and fixed by the sidewall of the button cell placing groove 931, and in the embodiment, the spring part 3212 is used to simulate the sidewall of the button cell, and the spring part 3212 will be deformed when abutting against the positive spring sheet 910, thereby simulating the moving process of the button cell.

[0050] By arranging the spring part 3212, the moving of the fixed part 3211 is avoided, the structural complexity of the button cell seat testing device is effectively reduced, and the production and maintenance costs are reduced.

[0051] In addition, the spring part 3212 deforms to absorb the downward pressure of the pressure block group 310, compared with directly using the fixed conductive contact piece 320, the spring part 3212 has a buffering effect in the pressing process, thereby avoiding the problem that the conductive contact piece 320 forcibly presses the positive spring sheet 910 and the negative spring sheet 920 to make the two overcome the welding defects to cause the internal circuit of the button cell seat 900 to be connected, and the detection effect of the button cell seat testing device on the button cell seat 900 with poor welding is effectively improved.

[0052] In the embodiment, the angle can be selected from 30 degrees to 60 degrees, and different set angles can be selected based on button cell seats 900 of different specifications.

[0053] In other embodiments, the conductive contact piece 320 can also use other components capable of deforming to simulate the installation process of the button cell, such as a torsional spring, and the two ends of the torsional spring respectively contact the negative spring sheet 920 and the positive spring sheet 910 at the pressing position, and the torsional spring has the same beneficial effect as the spring part 3212, that is, the pressure of the pressure block group 310 is buffered and absorbed to simulate the installation process of the button cell.

[0054] According to some embodiments of the present application, in combination Figure 3 As shown, the fixed part 3211 is detachably connected to the pressure block group 310. Based on button cell seats 900 of different specifications (the relative distance between the negative spring sheet 920 and the positive spring sheet 910 is different), the shape of the contact sheet 321 can be adaptively adjusted to ensure that the contact sheet 321 can simultaneously contact the positive spring sheet 910 and the negative spring sheet 920 at the pressing position, thereby avoiding false detection, and by detaching and replacing the contact sheet 321 of different specifications to adapt to button cell seats 900 of different specifications, the adaptability of the button cell seat testing device is improved, and the production cost is reduced.

[0055] In the embodiment, in combinationFigure 3 As shown, the fixing part 3211 is connected with the pressing block group 310 through bolts, and the connecting position and the spring sheet part 3212 are located on the two sides of the pressing block group 310 respectively, so as to avoid that the connecting position affects the contact between the fixing part 3211 and the negative spring sheet 920 or the contact between the spring sheet part 3212 and the positive spring sheet 910.

[0056] In other embodiments, the detachable connection can be clamping, gluing, magnetic connection, etc.

[0057] According to some embodiments of the present application, in combination with Figures 1 to 3 As shown, the pressing block group 310 comprises a push block 311 and a floating block 312 arranged in sequence along a set direction, the push block 311 is connected with the top rod 210, the floating block 312 is connected with the conductive contact piece 320, and the push block 311 is connected with the floating block 312 and a mounting gap is arranged between the two; the pressure detection piece 400 is a thin film type pressure sensor, the thin film type pressure sensor is mounted in the mounting gap, and the two ends of the pressure detection piece 400 abut against the push block 311 and the floating block 312 respectively.

[0058] In this embodiment, during the movement of the pressing block group 310 along the set direction to press the negative spring sheet 920, the reaction force generated by the deformation of the negative spring sheet 920 is transmitted to the thin film type pressure sensor through the floating block 312, and the thin film type pressure sensor effectively reduces the structural height of the button cell seat testing device in the set direction, so as to realize miniaturization design; and the thin film type pressure sensor is pressed and fixed by the push block 311 and the floating block 312, so as to prevent the thin film type pressure sensor from being separated from the pressing block group 310, and at the same time, ensure that the thin film type pressure sensor will not be collided by other components in the production environment, thereby prolonging the service life.

[0059] In this embodiment, the push block 311 and the floating block 312 are connected through an equal height screw, of course, other forms of fixed connection can also be adopted.

[0060] According to some embodiments of the present application, in combination with Figures 1 to 3 As shown, the support 100 further comprises a fixed seat 110 and a guide column 120, the guide column 120 extends along a set direction and is fixedly connected with the fixed seat 110, and the pressure head assembly 300 is provided with a guide hole 330 corresponding to the guide column 120. The guide column 120 plays a guiding role in the movement of the pressure head assembly 300, and at the same time, can replace the top rod 210 to bear part of the lateral force (force at a certain angle with the set direction), so as to avoid that the top rod 210 is subjected to excessive force and affects the movement precision of the pressure head assembly 300.

[0061] According to some embodiments of the present application, in combination with Figures 1 to 3As shown, the driving assembly 200 includes at least three guide columns 120, which are arranged around the top rod 210, can form a more stable support structure, compared with one or two guide columns 120, three guide columns 120 are more evenly distributed in space, can better resist the lateral deviation and distortion that the top rod 210 may encounter in the process of stretching out, thereby improving the stability of the overall structure. And the arrangement of three guide columns 120 can more accurately control the motion trajectory of the top rod 210. Because the number of guide columns 120 increases, their guiding effect on the top rod 210 is more obvious, so that the top rod 210 is more stable and accurate in the process of stretching out.

[0062] Of course, the number of guide columns 120 can be adaptively adjusted based on requirements.

[0063] According to some embodiments of the present application, in combination Figures 1 to 3 As shown, the driving assembly 200 further includes a push-pull electromagnet 220, which includes an electromagnetic coil and a push-pull rod 221, the electromagnetic coil is sleeved on the outer periphery of the push-pull rod 221, and the push-pull rod 221 is connected with the top rod 210.

[0064] In this embodiment, when current passes through the electromagnetic coil, the magnetic field generated by the current in the electromagnetic coil will cause a magnetic field around the electromagnetic coil in the opposite direction, and the generated magnetic field will interact with the push-pull rod 221 to generate a pushing force, thereby making the push-pull rod 221 stretch out or retract in a set direction.

[0065] The push-pull electromagnet 220 has a relatively small volume compared with other moving mechanisms (cylinder, sliding table module, etc.), which makes it can be used in a small space, and is easy to install. Effectively reduce the volume of the button cell seat testing device; the push-pull electromagnet 220 can complete the action within milliseconds, the response speed is very fast, and is suitable for occasions that require high-speed response. Effectively improve the working efficiency of the button cell seat testing device.

[0066] Of course, in other embodiments, the driving assembly 200 can also use cylinders, sliding table modules, screw modules and other components that can realize the movement of the top rod 210.

[0067] In this embodiment, the push-pull electromagnet 220 further includes a reset spring 222. When the current stops, the effect of the external magnetic field disappears, and the reset spring 222 restores the push-pull rod 221 to the original position.

[0068] According to some embodiments of the present application, in combination Figures 1 to 3 As shown, the button cell seat testing device further includes a leakage-proof sleeve 500, which is sealingly connected with the fixed seat 110 and surrounds a sealed space 510, and the push-pull electromagnet 220 is arranged in the sealed space 510.

[0069] In the embodiment, since some devices in the factory are gas source devices, gas emission or dust flying may be generated. The leakage-proof sleeve 500 is in sealing connection with the fixing base 110, a closed sealing space 510 is formed, the gas and the dust are effectively prevented from entering the push-pull electromagnet 220, and thus the normal work of the push-pull electromagnet 220 is protected. Moreover, the leakage-proof sleeve 500 avoids exposure of the push-pull electromagnet 220, provides certain leakage protection for the push-pull electromagnet 220, and improves the use safety.

[0070] The button cell holder production line according to the second aspect of the present application comprises the button cell holder testing device according to the above embodiment.

[0071] The button cell holder production line according to the embodiment of the present application has the same beneficial effects as the button cell testing device according to the first aspect of the present application, and thus will not be described herein.

[0072] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A button battery holder testing device for testing button battery holders, characterized in that, include: The bracket (100) is provided with a mounting position for placing the button battery holder (900). A drive assembly (200) includes a push rod (210) which is movably connected to the bracket (100); A pressure head assembly (300) is connected to one end of the top rod (210) facing the mounting position and is used to press the negative electrode spring (920) of the button battery holder (900) in a set direction. A pressure detection element (400) is connected to the pressure head assembly (300) and is used to detect the pressure value received by the pressure head assembly (300) along the set direction.

2. The button battery holder testing device according to claim 1, characterized in that, The pressure head assembly (300) includes a pressure block group (310) and a conductive contact (320) arranged sequentially along a set direction. The pressure head assembly (300) is adapted to switch between a released position and a pressed position, wherein the released position is the position where the conductive contact (320) is not pressed against the positive electrode spring (910) and negative electrode spring (920) of the button battery holder (900); and the pressed position is the position where the conductive contact (320) is pressed against the positive electrode spring (910) and negative electrode spring (920) of the button battery holder (900).

3. The button battery holder testing device according to claim 2, characterized in that, The conductive contact (320) is a contact piece (321), which includes a fixing part (3211) and a spring part (3212). The fixing part (3211) is connected to the pressure block assembly (310) and is used to abut against the negative electrode spring (920) of the button battery holder (900). The spring part (3212) extends from the edge of the fixing part (3211) at a set angle away from the set direction and is used to abut against the positive electrode spring (910) of the button battery holder (900).

4. The button battery holder testing device according to claim 3, characterized in that, The fixing part (3211) is detachably connected to the pressure block assembly (310).

5. The button battery holder testing device according to claim 2, characterized in that, The pressure block assembly (310) includes a push block (311) and a floating block (312) arranged sequentially along the set direction. The push block (311) is connected to the top rod (210), and the floating block (312) is connected to the conductive contact (320). The push block (311) and the floating block (312) are connected and there is an installation gap between them. The pressure detection element (400) is a thin-film pressure sensor, which is installed in the installation gap. The two ends of the pressure detection element (400) abut against the push block (311) and the floating block (312) respectively.

6. The button battery holder testing device according to any one of claims 1 to 5, characterized in that, The bracket (100) further includes a fixed base (110) and a guide post (120). The guide post (120) extends along the set direction and is fixedly connected to the fixed base (110). The pressure head assembly (300) is provided with a guide hole (330) corresponding to the guide post (120).

7. The button battery holder testing device according to claim 6, characterized in that, The drive assembly (200) includes at least three guide posts (120) arranged around the top rod (210).

8. The button battery holder testing device according to claim 6, characterized in that, The drive assembly (200) further includes a push-pull electromagnet (220), which includes an electromagnetic coil and a push-pull rod (221). The electromagnetic coil is sleeved on the outer periphery of the push-pull rod (221), and the push-pull rod (221) is connected to the top rod (210).

9. The button battery holder testing device according to claim 8, characterized in that, The button battery holder testing device also includes a leak-proof sleeve (500), which is sealed to the fixed base (110) and surrounds a sealed space (510), in which the push-pull electromagnet (220) is installed.

10. A button battery holder production line, characterized in that, Includes the button battery holder testing device as described in any one of claims 1 to 9.

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