Circuit detection probe capable of rebounding through magnetic force

Abstract

The utility model discloses a magnetic rebounding circuit detection probe, which comprises a needle cylinder, a linkage rod and a probe head, the linkage rod is arranged in the needle cylinder, the lower end of the linkage rod is connected with the probe head, and a damping part is arranged between the needle cylinder and the linkage rod; the damping component comprises a slope mechanism, a connecting rod, a fixed magnet and a movable magnet; the inclined plane mechanism is fixedly connected with the linkage rod; the upper end of the connecting rod is connected with the needle cylinder through a hinge; the fixed magnet is fixedly connected with the inner wall of the needle cylinder, and the movable magnet is fixedly connected with the linkage rod; the opposite surfaces of the fixed magnet and the movable magnet have the same polarity; in the initial state, the lower end of the connecting rod is located at the slope bottom. When the linkage rod is pressed, the slope mechanism is driven to move downwards, so that the connecting rod deflects towards one side of the inner wall of the needle cylinder, and the repulsive force between the fixed magnet and the movable magnet is gradually increased.

Description

Technical Field

[0001] The utility model relates to circuit detection technology, in particular to a circuit detection probe with magnetic rebound. Background Art

[0002] The main application areas of semiconductor / IC test probes include chip design verification, wafer testing, and semiconductor finished product testing. It plays a core role in connecting chips / wafers with test equipment and transmitting signals, which is of great significance for the quality control of semiconductor products.

[0003] The probe is generally formed by riveting and pre-pressing with precision instruments, and consists of four basic components: a needle head, a needle tail, a spring, and an outer tube.

[0004] During the wafer or chip testing process, probes are usually used to accurately connect the pins or solder balls of the wafer or chip to the tester in order to detect performance indicators such as conductivity, current, functionality and aging of the product.

[0005] Currently, most mainstream probes use springs as the key component for the extension and retraction of the needle tip. Due to high-frequency and long-term use in detection work, the springs are prone to aging and deformation. Utility Model Content

[0006] In view of the above-mentioned deficiencies of the current detection probe using a spring, the utility model provides a circuit detection probe with magnetic rebound, which can achieve the effect of extending the service life of the probe.

[0007] In order to achieve the above object, the embodiment of the utility model adopts the following technical solution:

[0008] A magnetic rebound circuit detection probe comprises a syringe, a linkage rod and a probe head, wherein the linkage rod is arranged in the syringe, and its lower end is connected to the probe head, and a damping component is arranged between the syringe and the linkage rod; the damping component comprises an inclined plane mechanism, a connecting rod, a fixed magnet and a movable magnet; the inclined plane mechanism is fixedly connected to the linkage rod; the upper end of the connecting rod is connected to the syringe through a hinge, and its lower end is in contact with the inclined plane; the fixed magnet is fixedly connected to the inner wall of the syringe, and the movable magnet is fixedly connected to the linkage rod; the opposite surfaces of the fixed magnet and the movable magnet have the same polarity; in the initial state, the lower end of the connecting rod is located at the bottom of the inclined plane; when the linkage rod is pressed, the inclined plane mechanism is driven to move downward, causing the connecting rod to deflect toward one side of the inner wall of the syringe.

[0009] According to one aspect of the utility model, it also includes an auxiliary return component; the auxiliary return component includes a limit magnet and a return magnet; the limit magnet is fixedly connected to the syringe; the return magnet is fixedly connected to the linkage rod; in the initial state, the limit magnet and the return magnet are in an adsorption state.

[0010] According to one aspect of the utility model, a roller is provided at one end of the connecting rod that contacts the inclined surface.

[0011] According to one aspect of the utility model, the fixed magnet and the movable magnet are bar magnets; the length of the movable magnet is greater than the length of the fixed magnet.

[0012] According to one aspect of the utility model, a shock absorbing block is arranged at one end of the return magnet facing the limit magnet.

[0013] According to one aspect of the utility model, a lower limit block is arranged on the linkage rod.

[0014] According to one aspect of the utility model, a connecting head is provided at the upper end of the linkage rod.

[0015] According to one aspect of the utility model, a pointed sleeve is provided at the lower end of the syringe.

[0016] Advantages of the utility model:

[0017] A combination of an inclined plane mechanism and a magnet is used to convert the longitudinal displacement of the linkage rod into the approach and distance between two repelling magnets. The repulsive force between the magnets is used to replace the mechanical spring, and an auxiliary return assembly is provided to help the linkage rod reset. Compared with springs, it is not easy to age and deform, has low mechanical loss, and has a longer service life of the detection probe, which reduces the frequency of repair and replacement of the probe and can reduce the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the structure of a magnetic rebound circuit detection probe described in the utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of a magnetic rebound circuit detection probe described in the utility model. Figure 2 .

[0021] Legend: 1. Syringe; 11. Tip sleeve; 2. Linkage rod; 21. Connecting head; 22. Lower limit block; 3. Probe head; 41. Inclined mechanism; 42. Connecting rod; 421. Hinge; 422. Roller; 43. Fixed magnet; 44. Movable magnet; 51. Limiting magnet; 52. Return magnet; 521. Shock-absorbing block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1 and Figure 2 As shown, a magnetic rebound circuit detection probe comprises a syringe 1, a linkage rod 2 and a probe head 3, wherein the linkage rod 2 is arranged in the syringe 1, and its lower end is connected to the probe head 3, and a damping component is arranged between the syringe 1 and the linkage rod 2; the damping component comprises an inclined plane mechanism 41, a connecting rod 42, a fixed magnet 43 and a movable magnet 44; the inclined plane mechanism 41 is fixedly connected to the linkage rod 2; the upper end of the connecting rod 42 is connected to the syringe 1 through a hinge 421, and its lower end is in contact with the inclined plane; the fixed magnet 43 is fixedly connected to the inner wall of the syringe 1, and the movable magnet 44 is fixedly connected to the linkage rod 2; the opposite surfaces of the fixed magnet 43 and the movable magnet 44 are of the same polarity;

[0024] In order to ensure the return force of the linkage rod 2, an auxiliary return assembly is also provided between the linkage rod 2 and the syringe 1; the auxiliary return assembly includes a limit magnet 51 and a return magnet 52; the limit magnet 51 is fixedly connected to the syringe 1; the return magnet 52 is fixedly connected to the linkage rod 2; in the initial state, the limit magnet 51 and the return magnet 52 are in an adsorption state;

[0025] In the initial state, under the repulsive force of the fixed magnet 43 and the movable magnet 44, the connecting rod 42 deflects to one side of the linkage rod 2, and its lower end is located at the bottom of the inclined plane; when the linkage rod 2 is pressed, the inclined plane mechanism 41 is driven to move downward, so that the connecting rod 42 deflects to the inner wall of the syringe 1, and the movable magnet 44 approaches the fixed magnet 43, and the repulsive force increases, that is, the linkage rod 2 needs to overcome the gradually increasing repulsive force between the fixed magnet 43 and the movable magnet 44, as well as the attractive force between the limit magnet 51 and the return magnet 52 to move downward until the probe head 3 is in a fully excited state; after the external force is removed, the linkage rod 2 returns to its original position under the action of the repulsive force between the fixed magnet 43 and the movable magnet 44 and the attractive force between the limit magnet 51 and the return magnet 52;

[0026] Furthermore, by changing the slope angle of the slope mechanism 41, the length of the connecting rod 42, and the specifications of the fixed magnet 43 and the movable magnet 44, the damping size in the movable stroke of the linkage rod 2 can be adjusted to be suitable for different movable strokes.

[0027] The end of the connecting rod 42 that contacts the inclined surface is provided with a roller 422, which helps to reduce friction, reduce loss and extend the service life.

[0028] In practical applications, the fixed magnet 43 and the movable magnet 44 are bar magnets; and, in practical applications, the length of the movable magnet 44 should be significantly greater than the length of the fixed magnet 43, or the length of the fixed magnet 43 should be significantly longer than the movable magnet 44, so as to ensure that the repulsive force between the two magnets will not produce a large and sudden change due to the change in the deflection angle of the connecting rod 42, thereby avoiding a clear sense of segmentation in the active stroke of the linkage rod 2.

[0029] In actual application, a shock-absorbing block 521 is provided at one end of the return magnet 52 facing the limiting magnet 51, which is used to absorb the vibration during the movement of the linkage rod 2, avoid direct contact between the limiting magnet 51 and the return magnet 52, and play a buffering role; the shock-absorbing block 521 is made of foam material or rubber material.

[0030] The linkage rod 2 is provided with a lower limit block 22 for limiting the travel of the linkage rod 2 to not exceed the lowermost end, and the limit magnet 51 serves to limit the uppermost end of the movable travel of the linkage rod 2 .

[0031] A connector 21 is disposed at the upper end of the linkage rod 2, on which grooves and protrusions are disposed for facilitating the combination of the probe and the driving unit.

[0032] A tip sleeve 11 is provided at the lower end of the syringe 1 for protecting the probe head 3 in an unactivated state. The tip sleeve 11 is fixedly connected to the lower end of the syringe 1 by screwing and can be disassembled for debugging, maintenance and replacement of parts of the probe.

[0033] Advantages of the utility model:

[0034] A combination of an inclined plane mechanism and a magnet is used to convert the longitudinal displacement of the linkage rod into the approach and distance between two repelling magnets. The repulsive force between the magnets is used to replace the mechanical spring, and an auxiliary return assembly is provided to help the linkage rod reset. Compared with springs, it is not easy to age and deform, has low mechanical loss, and has a longer service life of the detection probe, which reduces the frequency of repair and replacement of the probe and can reduce the cost of use.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A magnetic rebound circuit detection probe, comprising a syringe (1), a linkage rod (2) and a probe head (3), wherein the linkage rod (2) is arranged in the syringe (1) and its lower end is connected to the probe head (3), characterized in that: A damping component is provided between the syringe (1) and the linkage rod (2); the damping component comprises an inclined plane mechanism (41), a connecting rod (42), a fixed magnet (43) and a movable magnet (44); the inclined plane mechanism (41) is fixedly connected to the linkage rod (2); the upper end of the connecting rod (42) is connected to the syringe (1) through a hinge (421), and the lower end thereof is in contact with the inclined plane; the fixed magnet (43) is fixedly connected to the inner wall of the syringe (1), and the movable magnet (44) is fixedly connected to the linkage rod (2); the opposite surfaces of the fixed magnet (43) and the movable magnet (44) have the same polarity; in an initial state, the lower end of the connecting rod (42) is located at the bottom of the inclined plane; when the linkage rod (2) is pressed, the inclined plane mechanism (41) is driven to move downward, causing the connecting rod (42) to deflect toward one side of the inner wall of the syringe (1).

2. The circuit detection probe with magnetic rebound according to claim 1, characterized in that: It also includes an auxiliary return assembly; the auxiliary return assembly includes a limit magnet (51) and a return magnet (52); the limit magnet (51) is fixedly connected to the syringe (1); the return magnet (52) is fixedly connected to the linkage rod (2); in the initial state, the limit magnet (51) and the return magnet (52) are in an adsorption state.

3. The circuit detection probe with magnetic rebound according to claim 1, characterized in that: A roller (422) is provided at one end of the connecting rod (42) that contacts the inclined surface.

4. The circuit detection probe with magnetic rebound according to claim 1, characterized in that: The fixed magnet (43) and the movable magnet (44) are bar magnets; the length of the movable magnet (44) is greater than the length of the fixed magnet (43).

5. The circuit detection probe with magnetic rebound according to claim 2, characterized in that: A damping block (521) is provided at one end of the return magnet (52) facing the limit magnet (51).

6. The circuit detection probe with magnetic rebound according to claim 1, characterized in that: The linkage rod (2) is provided with a lower limit block (22).

7. The circuit detection probe with magnetic rebound according to claim 1, characterized in that: The upper end of the linkage rod (2) is provided with a connecting head (21).

8. The circuit detection probe with magnetic rebound according to claim 1, characterized in that: The lower end of the syringe (1) is provided with a pointed sleeve (11).

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