A test fixture laminated probe module

Abstract

The utility model discloses a kind of test fixture lamination probe module, belong to probe module technical field, it includes pedestal, the probe structure is equipped in the upper end surface center of the pedestal, the lower pressure structure is equipped in the upper end surface of pedestal and located in the both sides wall of probe structure, two The lower pressure structure outside and located in the end surface of pedestal is equipped with protective structure, in addition, the utility model, through three layers of laminated sheet, the layered design of independent spring and damping combination, each layer of laminated sheet is independently supported by four compression springs with damping, both can be through the difference of spring contraction amount to adapt the contact demand of the different height test point of measured piece, and can be assisted by damping Real-time inhibit spring vibration, make probe and test point form flexible fit and dynamic stable contact mode, solve the problem that high-low difference test point can be reliably contacted simultaneously, and, by two pressure sensors Real-time acquisition measured piece different area pressure data, avoid the damage of element caused by rigid lower pressure.

Description

Technical Field

[0001] This utility model belongs to the field of probe module technology, specifically a test fixture stacked probe module. Background Technology

[0002] Stacked probe modules are precision components commonly used in the testing of electronic equipment. They are widely used in the testing of integrated circuits, printed circuit boards, and other electronic components. With the rapid development of electronic technology, the integration of electronic components is becoming higher and the size is becoming smaller. This places higher demands on the accuracy and reliability of testing equipment. Stacked probe modules are usually made of multiple layers of thin sheet materials, each of which has precision-machined probe holes and conductive paths.

[0003] The existing test fixture stacked probe modules have the following main shortcomings:

[0004] Existing test fixtures with stacked probe modules are prone to problems such as excessive pressure leading to deformation and damage of the test piece, or insufficient pressure leading to poor probe contact, affecting test accuracy. When there is a height difference between the test points of the test piece, it is difficult to ensure that all probes make reliable contact at the same time, which can easily lead to missed or incorrect measurements. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a stacked probe module for a test fixture, which solves the problems in the prior art that are prone to deformation and damage to the test piece due to excessive pressure, or poor probe contact due to insufficient pressure, which affects the accuracy of the test. When there is a height difference between the test points of the test piece, it is difficult to ensure that all probes make reliable contact at the same time, which can easily lead to missed tests and false tests.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a test fixture stacked probe module, including a base, a probe structure provided at the center of the upper end face of the base, a pressing structure provided on both side walls of the probe structure and located on the upper end face of the base, and a protective structure provided on the outer side of the two pressing structures and located on the end face of the base.

[0007] The probe structure includes a base plate, which is located at the center of the upper surface of the base. Three stacked pieces are arranged vertically on the upper surface of the base plate. The upper surface of the base plate, the lower part of the base plate, and the upper surface of the stacked pieces at the center are all provided with four grooves arranged in a rectangular pattern.

[0008] As a further embodiment of this utility model: damping is provided at the center of each of the twelve grooves, compression springs are sleeved on the outer side of each of the twelve grooves, and multiple probe holes are arranged in a rectangular pattern on the upper surface of each of the three stacked plates.

[0009] As a further embodiment of this utility model: the protective structure includes four mounting columns, which are arranged in a rectangular pattern on the upper surface of the base plate, and a protective positioning shell is provided on the outer side of the center of the upper surface of the base.

[0010] As a further embodiment of this utility model: the two pressing structures include two frames, which are respectively set at the center of the upper surface of the base plate near both sides. Each of the two grooves has a sliding groove at the center of one side wall, and each of the two sliding grooves has a lead rod at the center of its interior. The outer walls of the two lead rods are threaded with connecting plates.

[0011] As a further embodiment of this utility model: one end of each of the two lead screws passes through the inner wall of the two slide grooves and the inner wall of the two frames to the upper end face of the two frames, and each end is fixedly connected to a pulley. A belt is sleeved on the outer wall of the two pulleys, and a mounting bracket is provided at the center of the upper end face of the frame on one side.

[0012] As a further embodiment of this utility model: a servo motor is provided at the center of the upper end face of the mounting bracket, and the output end of the servo motor is fixedly connected to one end of a pulley on one side.

[0013] As a further embodiment of this utility model: a pressure plate is provided at the center of the lower end face of the connecting plate, and pressure sensors are provided on both sides of the center of the lower end face of the pressure plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, through a layered design of three-layer laminations, independent springs and damping combination, each layer of laminations is independently supported by four damped compression springs. It can adapt to the contact requirements of test points at different heights of the test piece by the difference in spring contraction, and can also suppress spring vibration in real time by damping, so that the probe and the test point form a flexible and dynamically stable contact mode, solving the problem of reliable contact of test points with high and low differences at the same time.

[0016] 2. This utility model achieves absolute synchronous operation of the lead screws on both sides through a servo motor and pulley, ensuring uniform pressure distribution on the lower pressure plate. Two pressure sensors collect pressure data from different areas of the tested part in real time, forming a closed-loop feedback adjustment mechanism. It can automatically match the pressure threshold according to the material of the tested part, avoiding component damage caused by rigid pressing. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the orthographic section of the present invention;

[0019] Figure 3 This is a three-dimensional structural diagram of the probe structure of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the protective structure of this utility model.

[0021] In the diagram: 1. Base; 2. Protective structure; 201. Mounting column; 202. Protective positioning shell; 3. Probe structure; 301. Base plate; 302. Groove; 303. Damping; 304. Compression spring; 305. Lamps; 4. Pressing structure; 401. Frame; 402. Slide groove; 403. Lead screw; 404. Pulley; 405. Mounting bracket; 406. Servo motor; 407. Connecting plate; 408. Pressing plate; 409. Pressure sensor. Detailed Implementation

[0022] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0023] like Figures 1-4 As shown, this utility model provides a technical solution:

[0024] A test fixture stacked probe module, comprising:

[0025] The base 1 has a probe structure 3 at the center of its upper surface. The probe structure 3 has a pressing structure 4 on both sides of its upper surface. A protective structure 2 is provided on the outer side of the two pressing structures 4 and on the end face of the base 1.

[0026] The probe structure 3 includes a base plate 301, which is located at the center of the upper end face of the base 1. Three stacked pieces 305 are arranged vertically on the upper end of the base plate 301. Four grooves 302 are arranged in a rectangular pattern on the upper end face, the lower part, and the upper end face of the stacked pieces 305 at the center of the base plate 301. A damper 303 is provided at the center of each of the twelve grooves 302. A compression spring 304 is sleeved on the outside of each of the twelve grooves 302. Multiple probe holes are arranged in a rectangular pattern on the upper end face of the three stacked pieces 305.

[0027] The probe holes on the three stacked plates 305 are initially aligned with the test points of the test piece. The compression spring 304 in the groove 302 is in a naturally extended state, and the damper 303 provides a buffer for subsequent elastic movement. Under pressure, the test piece is smoothly pressed down to the probe structure 3, and its test point contacts the probe through the probe holes on the stacked plates 305. At this time, the pressure of the test piece is transmitted to the stacked plates 305, and the compression spring 304 is compressed and contracted, providing elastic buffer for the contact process and avoiding rigid collisions that could damage the probe or the test piece. At the same time, the damper 303 suppresses the high-frequency vibration of the compression spring 304, ensuring the stability of the contact between the probe and the test point. The vertical arrangement of the three stacked plates 305 allows for adaptive adjustment of the probe extension length according to the thickness of the test piece, ensuring reliable contact at test points of different heights.

[0028] The protective structure 2 includes four mounting posts 201, which are arranged in a rectangular shape on the upper surface of the base plate 301. A protective positioning shell 202 is provided on the outer side of the center of the upper surface of the base 1. The protective structure 2 provides positioning support for the base plate 301 through the four mounting posts 201. At the same time, the protective positioning shell 202 on the upper end of the base 1 limits the placement range of the test piece from the outside, preventing it from deviating from the test area, and playing a preliminary protection and positioning role.

[0029] The two pressing structures 4 include two frames 401, which are respectively located on the sides of the center of the upper end face of the base plate 301. Each of the two grooves 302 has a sliding groove 402 at the center of one side wall. Each sliding groove 402 has a lead screw 403 at its center. A connecting plate 407 is threaded onto the outer wall of each lead screw 403. One end of each lead screw 403 passes through the inner wall of the two sliding grooves 402 and the inner wall of the two frames 401, respectively, and connects to the upper end face of the two frames 401. Each end is fixedly connected to a pulley 404, and a belt is fitted onto the outer wall of each pulley 404. A mounting bracket 405 is located at the center of the upper end face of one side of the frame 401. A servo motor 406 is located at the center of the upper end face of the mounting bracket 405. The output end of the servo motor 406 is fixedly connected to one end of the pulley 404 located on one side. A pressing plate 408 is located at the center of the lower end face of the connecting plate 407. Pressure sensors 409 are installed on both sides. By starting the servo motor 406, its output end drives the pulley 404 on one side to rotate. Through belt transmission, the pulley 404 on the other side rotates synchronously, which in turn drives the two lead screws 403 to rotate coaxially in the slide groove 402. Since the connecting plate 407 is threadedly connected to the lead screw 403, the rotational motion of the lead screw 403 is converted into the vertical downward movement of the connecting plate 407 along the slide groove 402, which drives the lower pressure plate 408 to move down synchronously. During the downward movement of the lower pressure plate 408, the two pressure sensors 409 on its lower end face first contact the surface of the workpiece and detect the pressure value on the workpiece in real time. The pressure data is fed back to the control system. If the pressure does not reach the preset value, the servo motor 406 continues to drive the lower pressure plate 408 to move down. If the pressure is close to or exceeds the threshold, the servo motor 406 decelerates or stops to ensure that the workpiece is not damaged by excessive compression and to achieve precise pressure control.

[0030] The working principle of this utility model is as follows: The protective structure 2 forms a positioning support for the base plate 301 through four mounting columns 201. At the same time, the protective positioning shell 202 at the upper end of the base 1 limits the placement range of the test piece from the outside, preventing it from deviating from the test area, and playing a preliminary protection and positioning role. After the operator places the circuit board and electronic components of the test piece on the stack 305, after the test is started, the servo motor 406 is powered on and runs. Its output shaft drives the pulley 404 on the same side to rotate. Through the friction transmission of the belt, the pulley 404 on the other side rotates synchronously, thereby driving the two lead screws 403 to rotate at the same speed in the slide groove 402. Since the connecting plate 407 is connected to the lead screw 403 by threads, and the rotational freedom of the connecting plate 407 is restricted by the slide groove 402, the rotational motion of the lead screw 403 is converted into the vertical downward linear motion of the connecting plate 407 along the slide groove 402, which drives the lower pressure plate 408 to move down synchronously.

[0031] During the downward movement of the lower pressure plate 408, the two pressure sensors 409 first contact the upper surface of the test piece. The pressure sensors 409 transmit the detected resistance and voltage changes to the control system in real time. The system obtains the current pressure value through data processing. Under the pressure, the test piece moves downward, and its test pads and pins pass through the probe holes on the lamination 305 and contact the probe. At this time, the pressure of the test piece is transmitted to the compression spring 304 through the lamination 305. The compression spring 304 is compressed and generates an upward elastic force, which balances the pressure of the lower pressure plate 408, achieving flexible contact and avoiding damage to the probe and test point due to rigid collision. The damper 303 deforms as the compression spring 304 contracts, suppressing the high-frequency vibration and rebound of the compression spring 304, ensuring that the lamination 305 and the probe maintain a stable position and avoiding discontinuous or offset contact points. The vertical arrangement of the three laminations 305 can adapt to test pieces of different thicknesses or test points of different heights.

[0032] Furthermore, the control method of this utility model is controlled by a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Since this utility model is used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0033] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A test fixture stacked probe module, characterized in that: Includes a base (1), a probe structure (3) is provided at the center of the upper end face of the base (1), and a pressing structure (4) is provided on both sides of the probe structure (3) and on the upper end face of the base (1). A protective structure (2) is provided on the outside of the two pressing structures (4) and on the end face of the base (1). The probe structure (3) includes a base plate (301), which is located at the center of the upper surface of the base (1). Three stacked pieces (305) are arranged vertically on the upper end of the base plate (301). The upper surface of the base plate (301), the lower part and the center of the stacked pieces (305) are all provided with four grooves (302) arranged in a rectangular shape.

2. The test fixture stacked probe module according to claim 1, characterized in that: Damping (303) is provided at the center of each of the twelve grooves (302), and compression springs (304) are sleeved on the outer side of each of the twelve grooves (302). Multiple probe holes are arranged in a rectangular pattern on the upper surface of each of the three stacked plates (305).

3. The test fixture stacked probe module according to claim 1, characterized in that: The protective structure (2) includes four mounting posts (201), which are arranged in a rectangular pattern on the upper surface of the base plate (301). A protective positioning shell (202) is provided on the outer side of the center of the upper surface of the base (1).

4. The test fixture stacked probe module according to claim 1, characterized in that: The two pressing structures (4) include two frames (401), which are respectively located on the upper surface of the base plate (301) near the center on both sides. Each of the two grooves (302) has a sliding groove (402) at the center of one side wall. Each of the two sliding grooves (402) has a lead screw (403) at the center inside. The outer side wall of the two lead screws (403) is threaded with a connecting plate (407).

5. A test fixture stacked probe module according to claim 4, characterized in that: One end of each of the two lead screws (403) passes through the inner wall of the two slide grooves (402) and the inner wall of the two frames (401) to the upper end face of the two frames (401), and each end is fixedly connected to a pulley (404). A belt is sleeved on the outer wall of the two pulleys (404), and a mounting bracket (405) is provided at the center of the upper end face of the frame (401) on one side.

6. A test fixture stacked probe module according to claim 5, characterized in that: A servo motor (406) is provided at the center of the upper surface of the mounting bracket (405), and the output end of the servo motor (406) is fixedly connected to one end of a pulley (404) on one side.

7. A test fixture stacked probe module according to claim 5, characterized in that: A pressure plate (408) is provided at the center of the lower end face of the connecting plate (407), and pressure sensors (409) are provided on both sides of the center of the lower end face of the pressure plate (408).

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