CN217332669U - A test structure that is used for voice coil motor ground connection PIN foot to weld and detects - Google Patents

Abstract

The utility model relates to the technical field of equipment detection, and discloses a test structure for detecting the welding of a grounding PIN PIN of a voice coil motor, which comprises a connecting copper sheet and a test circuit; the test circuit is connected with a diode and a test IO port; the anode of the diode is connected with the connecting copper sheet during testing, and the cathode of the diode is connected with the test IO port; and the connecting copper sheet is contacted with the shell of the voice coil motor to be tested during testing. The utility model discloses can be used to solve the technical problem that voice coil motor ground connection PIN foot welding quality is difficult to detect, overall structure sets up succinctly, and easy operation can accurately test out the actual welding situation of voice coil motor ground connection PIN foot, and the function is reliable.

Description

A test structure that is used for voice coil motor ground connection PIN foot to weld and detects

Technical Field

The utility model relates to an equipment detects technical field, concretely relates to a test structure that is used for welding of voice coil motor ground connection PIN foot to detect.

Background

The voice coil motor is a device which converts electric energy into mechanical energy, can realize linear motion and motion with limited swing angle, and generates regular motion by utilizing the interaction between magnetic fields from permanent magnetic steel and magnetic poles in the magnetic fields generated by a conductive coil conductor. If a proper positioning feedback and induction device is adopted, the positioning precision of the voice coil motor can easily reach 10NM, and the acceleration can reach 300 g. Supported by the characteristics, the voice coil motor is mainly applied to small-stroke, high-speed and high-acceleration motion and is suitable for narrow space. In particular, the voice coil motor device is widely used in a camera module to assist a camera to realize an automatic focusing function.

A voice coil motor in an auto-focus camera is generally provided with a grounding PIN. Through this ground connection PIN foot of welding and base plate, can realize voice coil motor outside iron-clad ground connection via ground connection PIN foot, after ground connection PIN foot ground connection, camera module that follow-up equipment formed when using with terminal connections such as cell-phone, this ground connection PIN foot can play the shielding interference effect, guarantees the normal work of camera module. However, in practical application, because the voice coil motor casing is generally an iron casing, the heat dissipation performance of the iron casing is good, when the grounding PIN is welded on the voice coil motor casing, the welding heat is easy to dissipate, so that insufficient welding is caused, and the false welding of the grounding PIN of the voice coil motor is caused. To the yields voice coil motor, whether this ground connection PIN foot welds well, does not have the influence to camera functional test. But for a defective motor, in the function test of the camera, if the grounding PIN is well welded, the defective motor can be intercepted through the function test of the camera; if the grounding PIN is not welded sufficiently, and a cold joint condition exists, the function test of the camera cannot be blocked badly, and a defective motor cannot be detected sufficiently, so that the quality of the whole camera module is influenced.

Therefore, the confirmation of the actual welding condition of the grounding PIN is very important, but at present, no device for detecting the grounding PIN of the voice coil motor exists, and the conventional knocking detection method and shaking detection method are not suitable for small structures such as the grounding PIN of the voice coil motor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a test structure for voice coil motor ground connection PIN foot welding detects is used for solving the technical problem that voice coil motor ground connection PIN foot welding quality is difficult to detect, and overall structure sets up succinctly, and easy operation can accurately test out the actual welding situation of voice coil motor ground connection PIN foot, and the function is reliable.

The utility model provides a basic scheme does: a test structure for detecting the welding of a grounding PIN PIN of a voice coil motor comprises a connecting copper sheet and a test circuit; the test circuit is connected with a diode and a test IO port; the anode of the diode is connected with the connecting copper sheet during testing, and the cathode of the diode is connected with the test IO port; and the connecting copper sheet is contacted with the shell of the voice coil motor to be tested during testing.

The utility model discloses a theory of operation and advantage lie in: during the test, connect the copper sheet and contact with the voice coil motor shell that awaits measuring, connect the copper sheet simultaneously and link to each other with the diode positive pole, because the copper sheet itself possesses electric conductivity, through connecting the copper sheet, the diode electric property intercommunication among voice coil motor shell and the test circuit, and then, set up the diode electric property intercommunication among ground connection PIN foot and the test circuit on the voice coil motor shell, be about to ground connection PIN foot has accessed the test circuit who is equipped with diode and test IO mouth. At the moment, by utilizing the basic principle of forward conduction and reverse cut-off of the diode, if voltage drop exists in the test circuit, the grounding PIN of the voice coil motor to be tested is well welded; and if the test circuit shows that the circuit is open, the grounding PIN of the voice coil motor to be tested is not welded well.

This scheme is from the function that voice coil motor ground connection PIN foot corresponds, when ground connection PIN foot and base plate etc. welds well, can realize motor iron-clad ground connection, and the poor ground connection PIN foot of welding then can't realize motor iron-clad ground connection, and what correspond, ground connection PIN foot via voice coil motor shell, connect the copper sheet and insert test circuit after, can characterize the signal of telecommunication numerical value change for the difference under the state of ground connection or ungrounded. The scheme skillfully utilizes the point, and the detection of the welding condition is indirectly realized by combining the grounding performance of the grounding PIN with the circuit performance, so that the detection method is effective, simple to operate, simple in structure setting and high in practicability and economy.

Further, the medicine also comprises a treatment tool body; the jig is characterized in that an installation part is arranged on the jig body and used for accommodating a voice coil motor to be tested.

Set up like this, the voice coil loudspeaker voice coil that awaits measuring can be stably placed during the test for can remain stable when connecting copper sheet and voice coil loudspeaker voice coil motor contact, and then guarantee higher test accuracy.

Further, the jig also comprises a jig upper cover; the jig upper cover is hinged with the jig body; the connecting copper sheet is arranged on the inner surface of the jig upper cover, and a spring is connected between the jig upper cover and the connecting copper sheet.

Connect the copper sheet and be set up firmly on the tool is covered, contact stability when further guaranteeing to connect copper sheet and voice coil motor contact, simultaneously, the setting of spring can provide certain pressure when connecting copper sheet and voice coil motor contact, supplementary make connect the copper sheet can with voice coil motor shell good contact, can effectively avoid contact failure so that the condition of test inefficacy appears.

Further, the spring is a stiff spring.

The rigidity of rigid spring is stronger, compares in ordinary spring, and rigid spring can be better to connecting the copper sheet biography power, further guarantees to connect the good contact of copper sheet and voice coil motor shell, and the test reliability is higher.

Furthermore, the spring is provided with a plurality of springs which are uniformly arranged on the connecting copper sheet.

Compare in single spring, the spring that a plurality of evenly distributed set up can be more evenly, more fully to connecting the copper sheet application of force for it is more abundant and inseparable to connect the contact of copper sheet and voice coil motor shell face, and the test reliability is higher.

Furthermore, a first open hole is formed in the connecting copper sheet, and the shape of the first open hole is matched with that of the shell of the voice coil motor to be tested.

Set up like this, connect the copper sheet when with the contact of voice coil motor shell, can not receive other subassemblies influences of being connected on the voice coil motor, guarantee the contact stability who connects copper sheet and shell. Meanwhile, the material cost of the device is relatively reduced, and the economy is better.

Further, the jig upper cover is provided with a second opening, and the axis of the second opening is coaxial with the axis of the first opening.

Set up like this, to the voice coil motor module that is connected with subassemblies such as camera lens, when copper sheet and voice coil motor shell are connected in the laminating, the second trompil with connect the cooperation of the first trompil on the copper sheet, can reserve sufficient space for camera lens etc. and the irrelevant subassembly of test, loss camera lens etc. when avoiding the test. Simultaneously, set up like this and make this test structure can be applicable to and be connected with different subassemblies, be in the voice coil motor of different camera assembly stages, application scope is wider.

Further, the device also comprises a thimble; the thimble is used for connecting the test circuit with the connecting copper sheet, the thimble is connected with the anode of the diode, and the thimble is contacted with the connecting copper sheet during testing; the thimble is located one side of installation department, the thimble position corresponds with the position of connecting the copper sheet.

Set up like this, when the test, adopt the thimble to assist intercommunication test circuit and be connected the copper sheet, compare in directly adopting and connect copper sheet pin connection, more can guarantee that the circuit conduction is effective.

Furthermore, a rotating shaft is hinged between one side edge of the upper cover of the jig and one side edge of the jig body.

By adopting the structure, the upper cover of the jig and the jig body are hinged into a whole through the rotating shaft, so that the opening and closing operation is more convenient.

Further, the test board is also included; the test circuit is arranged on the test board; the test board is also provided with an indicator light; the indicator light is used for displaying the welding condition of the grounding PIN of the voice coil motor to be tested.

Set up like this, can judge the welding state of ground connection PIN foot fast by the pilot lamp, the test result is more convenient for observe.

Drawings

Fig. 1 is the utility model relates to an overall structure axonometric chart that is used for voice coil motor ground connection PIN foot welding to detect's test structure embodiment one.

Fig. 2 is the utility model relates to an overall structure plan view that is used for voice coil motor ground connection PIN foot welding to detect test structure embodiment one.

Fig. 3 is a test circuit diagram of a first test structure embodiment for voice coil motor grounding PIN welding detection.

Detailed Description

The following is further detailed by the specific embodiments:

the reference numbers in the drawings of the specification include: the fixture comprises a fixture upper cover 1, a locking lapping sheet 11, a second opening 12, a connecting copper sheet 2, a first opening 21, a fixture body 3, a locking shaft 31, an installation part 4, an ejector pin 5, a rotating shaft 6, a lead 7, a test board 8 and an indicator lamp 9.

The first embodiment is as follows:

the embodiment is basically as shown in the attached figures 1, 2 and 3: a test structure for detecting the welding of a grounding PIN PIN of a voice coil motor comprises a jig body 3, a jig upper cover 1, a thimble 5, a connecting copper sheet 2 and a test board 8; the test board 8 is provided with a test circuit connected with a diode and a test IO port; the thimble 5 is connected with the anode of a diode through a lead 7, and the cathode of the diode is connected with the test IO port; the connecting copper sheet 2 can be in contact with the shell of the voice coil motor to be tested, and the connecting copper sheet 2 can also be in contact with the thimble 5.

The connecting copper sheet 2 is arranged on the inner surface of the jig upper cover 1, and a spring is connected between the jig upper cover 1 and the connecting copper sheet 2. The spring is a rigid spring. The spring is equipped with the several, and evenly locates on connecting copper sheet 2, specifically, the one end of spring and the fixed surface who connects copper sheet 2 link to each other, and the other end of spring and the fixed internal surface of tool upper cover 1 link to each other. The connecting copper sheet 2 is provided with a first opening 21, and the shape of the first opening 21 is matched with that of the shell of the voice coil motor to be tested. The jig upper cover 1 is provided with a second opening 12, and the axis of the first opening 21 is coaxial with the axis of the second opening 12. The shape of second trompil 12 is circular, and the camera lens phase-match of size and voice coil motor pre-connection sets up like this, and second trompil 12 and the cooperation of first trompil 21 on connecting copper sheet 2 can leave sufficient space for components such as lens irrelevant with the test, lose lens etc. when avoiding the test.

Be equipped with installation department 4 on the anchor clamps body 3, installation department 4 is used for holding the voice coil motor that awaits measuring. In this embodiment, installation department 4 is equipped with two, and the symmetry is located on the fixture body 3, sets up like this, and the single can test more voice coil motors, and efficiency of software testing is higher. The jig upper cover 1 is hinged with the jig body 3; specifically, a rotating shaft 6 is hinged between one side edge of the jig upper cover 1 and one side edge of the jig body 3. In this embodiment, the jig body 3 and the jig upper cover 1 are rectangular and have matching dimensions, and the jig upper cover 1 can be opened and closed by the rotating shaft 6, which is convenient to operate. Be equipped with locking axle 31 on the side of the tool body 3, be equipped with on the side of tool upper cover 1 and take the piece 11 with the locking of the position size matched with of locking axle 31, during lock tool upper cover 1 and the tool body 3, can take the piece 11 block of locking on locking axle 31, firm pressfitting tool upper cover 1 and the tool body 3.

Specifically, the thimble 5 is arranged on one side of the mounting portion 4, and the position of the thimble 5 corresponds to the position of the connecting copper sheet 2. In this embodiment, the connecting copper sheet 2 is square, a rectangular copper sheet integrally formed is additionally arranged on one side edge of the square, and the position of the thimble 5 corresponds to the position of the rectangular copper sheet, namely, the fastening jig upper cover 1 and the jig body 3 are used, so that when the connecting copper sheet 2 is in contact with the voice coil motor shell, the rectangular copper sheet part of the connecting copper sheet 2 can be in contact with the thimble 5. Each connecting copper sheet 2 is provided with 5 springs, and specifically, the springs are respectively arranged at the four corners of the square part of the connecting copper sheet 2 and the center of the rectangular copper sheet part, so that the connecting copper sheet 2 is favorably in better contact with the voice coil motor shell and the thimble 5, and the reliability of the test is ensured.

An indicator lamp 9 is arranged on the test board 8; and the indicator light 9 is used for displaying the welding condition of the grounding PIN of the voice coil motor to be tested. When concrete test, open tool upper cover 1, will await measuring voice coil motor subassembly and put into installation department 4, then close tool upper cover 1, at this moment, the connection copper sheet 2 and the contact of voice coil motor shell and thimble 5 of 1 internal surfaces of tool upper cover, simultaneously, receive the spring force effect, can be so that connect copper sheet 2 and contact voice coil motor shell and thimble 5 betterly. At this time, the grounding PIN on the voice coil motor shell and the thimble 5 can be communicated through conduction of the connecting copper sheet 2, and further connected into a test circuit of the test board 8. Observing the numerical value display of the test circuit, if voltage drop exists in the test circuit, the grounding PIN of the voice coil motor to be tested is well welded, and the indicator light 9 is displayed to be green; if the test circuit shows that the circuit is open, the grounding PIN of the voice coil motor to be tested is not welded well, and the indicator light 9 shows red at the moment.

The test structure for voice coil motor ground connection PIN welding detection that this embodiment provided, simple structure, the test is effective, can accurately test out the actual welding situation of voice coil motor ground connection PIN, and the function is reliable. And, be equipped with the several stiff spring on connecting copper sheet 2, can effectively avoid appearing the copper sheet and voice coil motor shell or the condition of thimble 5 contact failure in the test, test reliability is higher. Meanwhile, the connecting copper sheets 2 and the jig upper cover 1 are provided with the holes, so that sufficient allowance spaces are constructed for components such as a lens and the like possibly connected to the voice coil motor, the voice coil motor is suitable for the voice coil motors in different camera assembling stages, and the application range is wide.

Example two:

a test structure for detecting the welding of a grounding PIN of a voice coil motor is characterized in that on the basis of the first embodiment, a thimble 5 structure is removed, and the structure of a connecting copper sheet 2 is changed.

In this embodiment, the connecting copper sheet 2 is rectangular, the rectangular copper sheet is provided with a first opening 21, the rectangular copper sheet is further provided with a lead point, the lead point is connected with a lead wire 7, one end of the lead wire 7 is connected with the lead point, and the other end of the lead wire is connected with the anode of the diode.

The test structure that is used for voice coil motor ground connection PIN foot welding to detect that this embodiment provided compares in embodiment one, and the structure setting is more simple, need not to set up the 5 structures of thimble, and direct lead wire can reach the effect of intercommunication ground connection PIN foot and test circuit on connecting copper sheet 2.

The above description is only for the embodiments of the present invention, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein too much, and those skilled in the art will know all the common technical knowledge in the technical field of the present invention before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the schemes, and some typical known structures or known methods should not become obstacles for those skilled in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (10)

1. A test structure for detecting the welding of a grounding PIN PIN of a voice coil motor is characterized by comprising a connecting copper sheet and a test circuit; the test circuit is connected with a diode and a test IO port; the anode of the diode is connected with the connecting copper sheet during testing, and the cathode of the diode is connected with the test IO port; and the connecting copper sheet is contacted with the shell of the voice coil motor to be tested during testing.

2. The test structure for detecting the soldering of the grounding PIN of the voice coil motor as claimed in claim 1, further comprising a jig body; the jig is characterized in that an installation part is arranged on the jig body and used for accommodating the voice coil motor to be tested.

3. The test structure for testing the soldering of the grounding PIN of the voice coil motor according to claim 1, further comprising a jig upper cover; the jig upper cover is hinged with the jig body; the connecting copper sheet is arranged on the inner surface of the jig upper cover, and a spring is connected between the jig upper cover and the connecting copper sheet.

4. The test structure for voice coil motor grounding PIN soldering detection according to claim 3, wherein the spring is a rigid spring.

5. The test structure for testing soldering of a grounding PIN of a voice coil motor as claimed in claim 4, wherein the number of the springs is plural and is uniformly arranged on the connecting copper sheet.

6. The test structure for testing the soldering of the grounding PIN of the voice coil motor as claimed in claim 3, wherein the connecting copper sheet is provided with a first opening, and the first opening matches with the shape of the casing of the voice coil motor to be tested.

7. The test structure for testing the soldering of the grounding PIN of the voice coil motor according to claim 6, wherein the jig has a second opening on the upper cover, and the axis of the second opening is coaxial with the axis of the first opening.

8. The test structure for voice coil motor grounding PIN soldering detection according to claim 7, further comprising a thimble; the thimble is used for connecting the test circuit with the connecting copper sheet, the thimble is connected with the anode of the diode, and the thimble is contacted with the connecting copper sheet during testing; the thimble is located one side of installation department, the thimble position corresponds with the position of connecting the copper sheet.

9. The testing structure for testing the soldering of the grounding PIN of the voice coil motor according to claim 3, wherein a rotating shaft is hinged between one side of the upper cover of the jig and one side of the jig body.

10. The test structure for testing grounding PIN soldering of voice coil motor according to claim 1, further comprising a test board; the test circuit is arranged on the test board; the test board is also provided with an indicator light; the indicator light is used for displaying the welding condition of the grounding PIN of the voice coil motor to be tested.

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