CN217935945U

CN217935945U - Loudspeaker conduction testing device

Info

Publication number: CN217935945U
Application number: CN202221538916.9U
Authority: CN
Inventors: 施博文; 陶娟萍
Original assignee: Shanghai Senon Electromechanical Equipment Co ltd
Current assignee: Shanghai Senon Electromechanical Equipment Co ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-11-29
Anticipated expiration: 2032-06-20

Abstract

The utility model relates to a peristaltic pump technical field, concretely relates to speaker conduction testing device, including the device body, the device body includes the test bench, is equipped with work piece supporting seat, probe group and pushing down the subassembly on the work piece test station on it, and the work piece supporting seat passes through the mesa of support column connection test bench, and the probe group includes positive and negative probe, and both connect the positive negative pole of power supply respectively, and pushing down the subassembly and being located work piece supporting seat top, is equipped with the work piece screens on the work piece supporting seat, and it includes a sunken, and the probe group is located one side of work piece screens; the pressing assembly comprises a liftable pressing plate and a first pressing plate stand column arranged on the lower surface of the pressing plate, and the first pressing plate stand column is located right above a workpiece clamping position. The utility model discloses the speaker electrode when quick accuracy is to the test is fixed a position, and the speaker electrode when guaranteeing the test is all the time got the electricity, has promoted test speed greatly, effectively improves production efficiency.

Description

Loudspeaker conduction testing device

Technical Field

The utility model relates to a peristaltic pump technical field, concretely relates to speaker conduction testing device.

Background

The conduction test work in the production of the loudspeaker is generally carried out manually, and during the operation, a manual meter-holding pen is used for contacting the pins of the two poles of the loudspeaker to supply power and then testing the on-off state of the loudspeaker, so that the quality of the loudspeaker is judged according to the size of the buzzing sound. The peristaltic pump is a miniaturized fluid power pump, belongs to common tools in the current medical field, and simulates human fingers to clamp the infusion hose and then alternately press the wall of the hose so as to enable liquid in the hose to flow forwards in work. The common peristaltic pump is small in size, so that a loudspeaker used on the peristaltic pump is small in size and not easy to hold. Like fig. 2 shows a speaker structure for peristaltic pump, the subtend both sides of its sound generating unit shell 1 'are equipped with two ear seats 2' of installation usefulness, all are equipped with fixed orifices 3 'on every ear seat 2', and the fastener of being convenient for passes, is equipped with two electrode connection point locations 4 'on the shell 1', and the external power supply behind the welding lead wire of being convenient for, perhaps directly laminate the PCB installation back and the point location welding on the PCB. If the speaker of this kind of structure adopts artifical handheld operation to switch on the test, then rely on test operation personnel's skill proficiency very much, grip and electrode alignment can occupy most of time in whole test work, when the pen point end touches the speaker electrode moreover, also can lead to influencing test effect because the application of force is not enough, for example have under the circumstances such as oxidation, adhesion debris or damaged deformation at the pen point end, the dynamics will make the test piece can't switch on smoothly inadequately during if the contact. Therefore, when testing manually, the efficiency of testing is very low due to many problems, and the actual requirements of normal mass production cannot be met far away. Today, the automatic production technology is rapidly developed, and the situation seriously restricts the production efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a speaker conduction testing device solves above technical problem.

The utility model provides a technical problem can adopt following technical scheme to realize:

a loudspeaker conduction testing device comprises a device body, wherein the device body comprises a testing bench, a workpiece testing station is arranged on the testing bench, a loudspeaker is placed on the workpiece testing station and then conducted and tested, a workpiece supporting seat, a probe set and a pressing assembly are arranged on the workpiece testing station, the workpiece supporting seat is connected with the table board of the testing bench through a supporting column, the probe set comprises a positive probe and a negative probe, the positive probe and the negative probe are respectively connected with the positive electrode and the negative electrode of a power supply, the pressing assembly is positioned above the workpiece supporting seat,

the workpiece supporting seat is provided with a workpiece clamping position which is convenient for clamping a loudspeaker to be tested, the workpiece clamping position comprises a recess positioned on the upper surface of the workpiece supporting seat, the probe group is positioned on one side of the workpiece clamping position, any probe upwards faces to a corresponding electrode of the loudspeaker to be tested, which is placed in the workpiece clamping position, namely, after the loudspeaker to be tested is placed in the workpiece clamping position, the position of each probe is right below the corresponding electrode;

the pressing component comprises a liftable pressing plate and a first pressing plate stand column arranged on the lower surface of the pressing plate, the first pressing plate stand column is located right above the workpiece clamping position, so that after the pressing plate is lifted, the first pressing plate stand column can be driven to move downwards and press the shell of the workpiece clamping position to be tested of the loudspeaker, an electrode of the shell is made to contact with a probe, and the accurate positioning and tight contact of the electrode are ensured.

The utility model discloses a set up the device body and carry out the higher test of precision to the await measuring speaker, the await measuring speaker is placed behind the work piece screens, and its position is subject to the sunk structure of work piece screens and is fixed, and the tightness of speaker electrode and probe contact can be ensured to the oppression of the first clamp plate stand of push-down fit of clamp plate, has eliminated the contact failure among the traditional manual work process and has leaded to the problem of test failure.

The lower surface of clamp plate is equipped with two opposite direction settings first clamp plate stand, two the vertical projection of first clamp plate stand is located the position of placing of two ear seats of the examination of awaiting measuring speaker in the work piece screens.

The utility model discloses a set up mated first clamp plate stand, correspond two ear seats of the examination speaker that await measuring to only contact the ear seat when making its oppression, need not to contact speaker sound generating unit shell outer wall, can effectively reduce the damage to the shell.

The workpiece clamping position comprises a group of positioning pins, the positioning pins correspond to the first pressure plate stand columns one by one, and the positioning pins are convenient for the loudspeaker to be tested to be placed in the workpiece clamping position and then enable the ear seats of the loudspeaker to be clamped into the positioning pins;

and any positioning pin is positioned under the first pressing plate stand column corresponding to the positioning pin, and a hole for the positioning pin to penetrate into is formed in the lower end of the first pressing plate stand column.

The lower surface of clamp plate is equipped with four second clamp plate stands, arbitrary the equal vertical back down of second clamp plate stand, its vertical projection all falls the upper surface of work piece supporting seat the clamp plate pushes down and when the examination speaker that awaits measuring is oppressed at first clamp plate stand, second clamp plate stand contact and oppress the upper surface of work piece supporting seat makes first clamp plate stand can't further push down, avoids the operation when leading to first clamp plate stand to continuously push down the damage to the speaker shell.

The workpiece supporting seat is connected with the test bench through the four supporting columns, and the four supporting columns are respectively arranged at four corners of the lower surface of the workpiece supporting seat.

The utility model discloses a four bights in the bottom surface of work piece supporting seat all set up the support column, make the work piece supporting seat more steady when the test, avoid leading to the test failure because of the supporting seat slope.

The pressing component comprises a pressing rod, a pressing rod bracket and a guide rod, wherein the guide rod is vertically and downwards fixed on the table top of the test bench, the pressing plate is sleeved on the guide rod through a guide rod through hole on the pressing plate,

the pressure bar support is fixed on the table top of the test bench, a sleeve is arranged on the pressure bar support, and the pressure bar penetrates through the sleeve and then is connected with the pressure plate downwards.

The top of the pressure lever is provided with a pressure lever handle which is convenient for driving the pressure lever to move downwards, and the pressure lever is moved downwards by pulling the pressure lever handle.

The supporting column is of a telescopic structure, and the top end of any probe of the probe set is lower than the lower bottom surface of the recess in the workpiece clamping position.

Has the beneficial effects that: due to the adoption of the technical scheme, the utility model discloses can be when the conduction test convenient location speaker electrode, the quick accuracy conduction test that carries on ensures that the speaker electrode when testing is all the time got the electricity, has eliminated the proficiency requirement among the manual operation, has avoided because of test stylus and the problem that the contact force degree leads to the test failure, has promoted test speed greatly, effectively improves production efficiency.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of a speaker for conducting a conduction test according to the present invention;

FIG. 3 is a schematic structural view of the support base of the present invention;

fig. 4 is a schematic structural view of the pressing plate of the present invention;

FIG. 5 is an application view of the present invention to arrange a conveyor belt on a test bed;

FIG. 6 is a partial perspective view of the support base of the present invention;

fig. 7 is a schematic structural view of the pressing assembly of the present invention;

fig. 8 is a partial view of fig. 7.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further explained with reference to the specific drawings. It is noted that the terms "first," "second," "third," "fourth," and the like (if any) in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises" or "comprising," and any variations thereof, are intended to cover non-exclusive inclusions, such that a product or apparatus that comprises a list of elements or units is not necessarily limited to those elements or units expressly listed, but may include other elements or units not expressly listed or inherent to such product or apparatus.

Referring to fig. 1 and 3, the loudspeaker conduction testing device comprises a device body, wherein the device body comprises a testing bench, a workpiece testing station is arranged on the testing bench, and the loudspeaker is placed on the workpiece testing station for conduction testing.

A workpiece supporting seat 2, a probe group 3 and a pressing component 4 are arranged on the workpiece testing station, the workpiece supporting seat 2 is connected with a table board 1 of the testing table frame through a supporting column 5, the probe group 3 comprises a positive probe and a negative probe which are respectively connected with the positive pole and the negative pole of a power supply, the pressing component 4 is positioned above the workpiece supporting seat 2,

the workpiece supporting seat 2 is provided with a workpiece clamp position which is convenient for clamping a loudspeaker to be tested, the workpiece clamp position comprises a recess 201 positioned on the upper surface of the workpiece supporting seat, the probe group 3 is positioned on one side of the workpiece clamp position, any probe upwards faces to a corresponding electrode of the loudspeaker to be tested which is positioned in the workpiece clamp position, namely, after the loudspeaker to be tested is positioned in the workpiece clamp position, the position of each probe is right below the corresponding electrode;

as shown in fig. 4 and 7, the pressing component 4 includes a pressing plate 401 capable of ascending and descending and a first pressing plate upright post 4021 disposed on the lower surface of the pressing plate 401, the first pressing plate upright post 4021 is located right above the workpiece clamping position, so that after the pressing plate 401 ascends and descends, the first pressing plate upright post 4021 is driven to move downwards and press the housing of the speaker to be tested placed in the workpiece clamping position, an electrode of the speaker contacts with the probe, and the accurate positioning and tight contact of the electrode are ensured.

The utility model discloses during the actual operation, the both sides that can lie in the work piece test station on the mesa of test bench respectively set up a work piece collection basket (not shown in the figure), and the work piece collection basket of its one side is used for collecting the speaker that the test passed through, and another collection basket then is used for collecting the speaker that does not pass through. Alternatively, as shown in fig. 5, two conveyor belts with front and back conveying directions may be respectively disposed on the table top 1 at the left and right sides of the workpiece testing station, one conveyor belt 901 is used for conveying speakers that pass the test, and the other conveyor belt 902 is used for conveying speakers that fail the test, so as to form a production line, wherein speakers that pass the test may flow into a subsequent packaging step, and speakers that fail the test may flow into a waste process or a review process.

Fig. 5 is a simplified view, with the hold-down assembly hidden.

It should be noted that the utility model discloses a work piece screens is including all positions that cover after the speaker that awaits measuring is placed, including the position of placing of speaker sound generating unit shell and the ear seat of subtend setting on the speaker shell.

In some preferred embodiments, as shown in fig. 4, the lower surface of the platen 401 is provided with two first platen columns 4021 which are oppositely arranged, and the vertical projections of the two first platen columns 4021 are located at the placing positions of the two ear seats of the speaker to be tested in the workpiece clamping position. The utility model discloses in, through setting up mated first clamp plate stand 4021, correspond two ear seats of the examination speaker that await measuring to only contact the ear seat when making its oppression, need not to contact speaker sound production unit shell outer wall, can effectively reduce the damage to the shell.

The utility model discloses an improve the stability of placing of examination work piece in testing station, can set up according to following structure: as shown in fig. 3, the workpiece clamp position includes a set of positioning pins 202, the positioning pins 202 correspond to the first pressing plate columns 4021 one by one, so that the speaker to be tested is placed in the workpiece clamp position and then the ear seats of the speaker are clamped into the positioning pins 202;

any locating pin 202 is located under the corresponding first pressure plate stand column 4021, and the lower end of the first pressure plate stand column 4021 is provided with a hole for the locating pin 202 to penetrate through.

It should be noted that the holes are formed at the lower ends of the first presser leg 4021 to press the first presser leg 4021 downward, and the lower ends thereof contact and press the speaker ear seats without being obstructed by the contact with the positioning pins 202, so that the diameter of the holes at the lower ends of the first presser leg 4021 is larger than the diameter of the positioning pins 202, so that the insertion of the positioning pins 202 is not obstructed. The aperture arrangement of the lower end of first platen post 4021 is shown in FIG. 4.

The utility model discloses an avoid in the test process, first clamp plate stand causes the device damage because of excessively oppressing the device surface, can set up according to following structure: as shown in fig. 4, the lower surface of the pressing plate 401 is provided with four second pressing plate columns 4022, and after any second pressing plate column 4022 is vertically downward, the vertical projection of the second pressing plate column 4022 falls on the upper surface of the workpiece support base 2, when the pressing plate 401 is pressed down and the first pressing plate column 4021 presses the speaker to be tested, the second pressing plate column 4022 contacts and presses the upper surface of the workpiece support base 2, so that the first pressing plate column 4021 cannot be further pressed down, and the damage to the speaker housing when the operation is not performed when the first pressing plate column 4021 is continuously pressed down is avoided.

The utility model discloses do the stability that improves the supporting seat after further setting up to the connection structure of work piece supporting seat and test bench: as shown in fig. 3, the workpiece support base 2 is connected to the test bench through four support columns 5, and the four support columns 5 are respectively disposed at four corners of the lower surface of the workpiece support base 2. All set up support column 5 through four bights at the bottom surface of work piece supporting seat 2, make work piece supporting seat 2 more steady when the test, avoid leading to the test failure because of work piece supporting seat 2 slopes. In addition, the height of the workpiece supporting seat can be flexibly adjusted through the four supporting columns, and meanwhile, the surface stability of the workpiece supporting seat can be ensured. For example, the support column structure is formed by matching an adjusting bolt with a nut, after the adjusting bolt penetrates through the workpiece support seat, an adjusting nut is screwed into each section of bolt rod outside the surfaces of the two sides of the workpiece support seat, so that the workpiece support seat is fixed at a certain position of the bolt rod body of the adjusting bolt, and when the height of the support seat needs to be adjusted upwards or downwards, the adjusting nuts on the bolt rod bodies on the surfaces of the two sides of the support seat need to be adjusted simultaneously.

The utility model discloses can set up according to following structure and push down the subassembly: as shown in fig. 1, 4 and 7, the pressing assembly 4 includes a pressing rod 403, a pressing rod bracket 404 and a guide rod 405.

The guide rods 405 are vertically fixed on the table top 1 of the test bench downwards, the press plate 401 is sleeved on the guide rods 405 through the guide rod through holes on the press plate,

the pressure bar support 404 is fixed on the table top 1 of the test bench, a sleeve 406 is arranged on the pressure bar support 404, and the pressure bar 403 is connected with the pressure plate 401 downwards after penetrating through the sleeve 406.

The utility model discloses during operation test operation, depression bar 403 is along sleeve 406 up-and-down motion, drive clamp plate 401 during the downstream and move down, make first clamp plate stand 4021 and second clamp plate stand 4022 move down when clamp plate 401 moves down, first clamp plate stand 4021 contact and oppression are placed in the examination of awaiting measuring speaker (or ear seat) of work piece screens, thereby make the electrode and the probe group in close contact with of speaker, treat that probe group 3 goes up the electricity after can accurately acquire and switch on the test result, second clamp plate stand 4022 is when first clamp plate stand 4021 oppresses speaker or ear seat, the surface of work piece supporting seat 2 is contacted and oppressed, thereby restrict first clamp plate stand 4021's stroke of pushing down, avoid first clamp plate stand 4021's oppression damage to treat the surface of test piece.

As shown in fig. 7, in order to improve the smoothness of the lifting of the pressing plate 401 on the guide rod 405, a linear bearing 407 may be fixed to the upper surface of the pressing plate 401 at a through hole through which the guide rod 405 passes, the linear bearing 407 may be fitted into the through hole, and the guide rod 405 may pass through the linear bearing 407 when passing through the pressing plate 401 from the bottom to the top.

The utility model discloses a convenient operation, as shown in fig. 7, fig. 8, the top of depression bar 403 is equipped with the depression bar handle 408 that is convenient for drive depression bar to move down, makes depression bar 403 move down through pulling depression bar handle 408.

Specifically, as shown in fig. 8, the handle 408 of the compression bar has an L-shaped structure, a first fastening hole 4081 is formed at the bending portion, a second fastening hole 4082 is formed at the end of the bottom edge,

the lower end of the compression bar 403 penetrates through the sleeve 406 and then is fixedly connected with the pressure plate 401, the upper end of the compression bar 403 is upwards connected with the lower end of the connecting piece 409 in a rotating mode, and the upper end of the connecting piece 409 is connected with the first fastener hole 4081 of the compression bar handle 408 in a rotating mode.

Strut handle 408 is pivotally attached to the upper end of platen bracket 404 through second fastener hole 4082, and the lower end of platen bracket 404 is fixedly attached to sleeve 406. The main structure of the pressure plate support 404 is fixed on the support 410, and the support 410 is fixedly connected with the table top 1 of the test bench through a support 411.

In the present invention, as shown in fig. 3 and 5, the supporting column adopts a retractable supporting column, and the top of any probe of the probe set 3 is lower than the bottom surface of the recess 201 in the workpiece position (fig. 3 and 5 show that the workpiece supporting seat can be regarded as having sunk a certain height, and therefore the top of the probe upwards exceeds the height of the bottom surface of the recess in the workpiece position).

Specifically, can make it possess flexible function after setting up the support column according to following structure: as shown in fig. 3 and 6, any one of the supporting columns 5 includes a loop bar 501 and a core bar 502, the loop bar 501 is sleeved outside the core bar 502, the core bar 502 is telescopic in the loop bar 501, an elastic body (such as a spring or a reed) can be arranged in an inner cavity of the loop bar 501, the loop bar 501 is vertically fixed on the table top 1 of the test bench, one end of the core bar 502 vertically extends downwards into the inner cavity of the loop bar 501 and then contacts with the elastic body, and the other end vertically extends upwards and then is connected with the bottom surface of the workpiece supporting seat 2. To prevent the resilient action of the elastomer from pushing the core rod 502 out of the sleeve 501, a stop (not shown) such as a stop ring or a stop may be provided at the upper opening of the sleeve 501, and the end of the core rod that extends into the sleeve may also be provided with a corresponding end cap that prevents the end cap from jumping out of the inner cavity of the sleeve.

Fig. 3 and fig. 6 show the arrangement of the support columns of another telescopic structure based on the above embodiment: the table top 1 of the test bench is provided with a telescopic supporting column 5, the upper part of the exposed table top is a core rod 501, a loop bar 502 with a built-in spring is arranged below the table top 1, the upper end of the core rod 502 is contacted with the bottom surface of the supporting seat 2, and the supporting seat 2 is jacked up when the supporting column 5 extends upwards; in order to prevent the supporting seat 2 from being separated from a station due to the influence of elasticity, a combined hole of a through hole and a counter bore can be formed in the supporting seat 2, the counter bore is formed below an upper through hole and is communicated with the upper through hole in an integrated mode, a fastening bolt 6 penetrates through the counter bore from top to bottom, the fastening bolt 6 is fixedly connected with the table board 1, a bolt head of the fastening bolt sinks into the counter bore, the diameter of the bolt head of the fastening bolt 6 is larger than that of the through hole part of the combined hole, a bolt rod of the fastening bolt 6 can freely stretch out and draw back at the through hole part of the combined hole, and therefore when the supporting seat is jacked up, the supporting seat cannot be separated due to the limitation of the bolt head of the fastening bolt 6.

The utility model discloses an optimize test structure, be extending structure through setting up the support column for the work piece supporting seat also can have certain lift stroke, this stroke can set up to be less, under this structure sets up, can make the speaker after placing the work piece screens, a less interval space in the top of its electrode downward distance probe makes second clamp plate stand oppress behind the await measuring speaker ear seat of examination downwards again after the clamp plate pushes down, make it remove this interval space after moving down, thereby make speaker electrode in close contact with probe top. The optimized test structure can be used for testing under the condition that the probe is always electrified, namely, under the arrangement of the structure, the power supply does not need to be frequently started in each test period.

The utility model discloses when setting up, as shown in fig. 1, can set up rack 8 in the bottom of test rack, the power supply is built-in wherein, and 8 front side boards of rack can set up the switch 801 of convenient operation, and switch 801 inserts power supply's anodal output or negative pole output to go up the electric condition through switch 801 control. As shown in fig. 1, a rocker switch is provided on the front of the cabinet for easy opening, but for increased convenience of operation, the switch 801 may also be provided as a push-button switch or a toggle switch.

To sum up, the utility model discloses a set up the device body and carry out the higher test of precision to the await measuring speaker, the await measuring speaker is placed behind the work piece screens, and its position is subject to the sunk structure of work piece screens and is fixed, and the tightness of speaker electrode and probe contact can be ensured to the oppression of the first clamp plate stand of lower press fit of clamp plate, has eliminated the contact failure among the traditional manual work process and has leaded to the problem of test failure.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A loudspeaker conduction testing device comprises a device body, wherein the device body comprises a testing bench, a workpiece testing station is arranged on the testing bench, and the loudspeaker conduction testing device is characterized in that a workpiece supporting seat, a probe set and a pressing assembly are arranged on the workpiece testing station, the workpiece supporting seat is connected with a table board of the testing bench through a supporting column, the probe set comprises a positive probe and a negative probe, the positive probe and the negative probe are respectively connected with a positive electrode and a negative electrode of a power supply, the pressing assembly is positioned above the workpiece supporting seat,

the workpiece supporting seat is provided with a workpiece clamping position which is convenient for clamping a loudspeaker to be tested, the workpiece clamping position comprises a recess positioned on the upper surface of the workpiece supporting seat, the probe group is positioned on one side of the workpiece clamping position, and any probe upwards faces a corresponding electrode of the loudspeaker to be tested, which is placed in the workpiece clamping position;

the pressing assembly comprises a lifting pressing plate and a first pressing plate stand column arranged on the lower surface of the pressing plate, and the first pressing plate stand column is located right above the workpiece clamping position.

2. The loudspeaker conduction testing device according to claim 1, wherein two first pressing plate columns are oppositely arranged on the lower surface of the pressing plate, and the vertical projections of the two first pressing plate columns are located at the placing positions of the two ear seats of the loudspeaker to be tested in the workpiece clamping position.

3. The loudspeaker conduction testing device according to claim 2, wherein the workpiece clamp comprises a set of positioning pins, and the positioning pins correspond to the first platen columns one to one;

4. The conduction testing device of claim 1, wherein four second pressing plate columns are arranged on the lower surface of the pressing plate, and after any second pressing plate column vertically faces downwards, the vertical projection of the second pressing plate column falls on the upper surface of the workpiece supporting seat.

5. The device according to claim 1, wherein the workpiece support base is connected to the test bench through four support pillars, and the four support pillars are respectively disposed at four corners of a lower surface of the workpiece support base.

6. The conduction testing device for the loudspeaker according to any one of claims 1 to 5, wherein the pressing assembly comprises a pressing rod, a pressing rod bracket and a guide rod, wherein the guide rod is vertically fixed on the table top of the testing table frame downwards, the pressing plate is sleeved on the guide rod through a guide rod through hole on the pressing plate,

7. The device for testing the conduction of the speaker as claimed in claim 6, wherein a handle of the compression bar is disposed at the top of the compression bar for driving the compression bar to move downwards.

8. The conduction testing device for the loudspeaker according to any one of claims 1 to 5, wherein the supporting column is of a telescopic structure, and the top end of any probe of the probe set is lower than the bottom surface of the recess in the workpiece clamp.

9. The conduction testing device for the speaker according to claim 6, wherein the supporting column is a retractable supporting column, and the top end of any probe of the probe set is lower than the bottom surface of the recess in the workpiece clamp.

10. The conduction testing device for the speaker according to claim 7, wherein the supporting column is a retractable supporting column, and the top end of any probe of the probe set is lower than the bottom surface of the recess in the workpiece clamp.