Tweezers capable of reducing damage rate of LD laser chip

Abstract

The utility model relates to the technical field of semiconductor laser chip testing, in particular to a pair of tweezers capable of reducing the damage rate of an LD laser chip, and a stop block assembly is arranged on one inner side wall of a tweezers main body. When the pair of tweezers is used, the check block assembly is arranged between the two arms of the tweezers, and the minimum opening degree of the tweezers is controlled through blocking of the check block assembly; the minimum distance that two arms of the tweezers main body can get close to each other is limited, and the situation that the distance between the two arms of the tweezers main body is smaller than the width of a chip due to the fact that the hand force of an operator is increased is avoided; the risk that the chip is cracked and damaged when the chip is clamped by the tweezers is reduced, the feeding quality of the laser chip is improved, and the damage rate of the laser chip is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor laser chip testing, and particularly relates to a pair of tweezers that can reduce the damage rate of LD laser chips. Background Technique

[0002] During the testing process of LD laser chips, some chips and bars that are left behind after being extracted by the equipment usually need to be manually transferred to the testing equipment using tweezers. The size of the laser chip is very small, especially the chip die, which is in the micron level and is easy to break or crack. When the existing tweezers are used to pick up the chips, it highly tests the proficiency of the operator. The clamping force is completely controlled by the hand. If the force is too large, the chip will be brittle and scrapped. If the force is slightly smaller, the chip is likely to fall and be lost during the movement of the tweezers. During the extraction process, the hand needs to be kept stable and the force needs to be precise. Therefore, there is a certain degree of damage rate during the transfer of chips and bars, which affects the quality of laser chips and bars. Content of the Utility Model

[0003] The purpose of the utility model is to provide a pair of tweezers that can reduce the damage rate of LD laser chips in view of the defects and deficiencies of the prior art.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A pair of tweezers that can reduce the damage rate of LD laser chips according to the utility model includes a tweezer body; a stopper assembly is arranged on one inner side wall of the tweezer body, and the stopper assembly is a telescopic assembly with adjustable length. The stopper assembly includes a knob and a fixed cylinder fixed on the tweezer body; an internal thread of the knob is arranged on the inner side wall of the knob; an external thread matching the internal thread of the knob is arranged on the outer side wall of the fixed cylinder; the external thread is threadedly connected with the internal thread of the knob, and a braking switch module is arranged between the knob and the fixed cylinder. The braking switch module includes a sliding shaft arranged inside the fixed cylinder; an anti-slip retaining ring is arranged on the inner side wall of the fixed cylinder; a slider slidably connected with the inner cavity of the fixed cylinder is fixed on the shaft body of the sliding shaft; the sliding shaft is slidably connected with the knob; a spring that presses the slider against the anti-slip retaining ring is arranged inside the fixed cylinder, and a plurality of retaining teeth are evenly distributed on the surface of the anti-slip retaining ring facing the slider; slider teeth meshing with the retaining ring teeth are arranged on the surface of the slider facing the anti-slip retaining ring; the cross-sections of the slider teeth and the retaining ring teeth are both triangular.

[0006] Further, a pin sliding groove is opened on the sliding shaft; the pin sliding groove extends along the axial direction of the sliding shaft; a sliding pin is fixed on the knob; the diameter of the sliding pin is equal to the width of the pin sliding groove; the sliding pin is snapped into the pin sliding groove.

[0007] Further, a pin insertion hole matching the sliding pin is formed in the side wall of the knob.

[0008] Further, a positioning block is fixed at the bottom of the fixed cylinder; a positioning groove matching the positioning block is formed in one side wall of the tweezer body; a positioning hole is provided in the positioning groove; a connecting threaded hole is provided on the positioning block; the positioning block is inserted into the positioning groove; and a bolt is screwed into the connecting threaded hole after passing through the positioning hole.

[0009] Further, scale lines are evenly distributed on the outer side wall of the knob.

[0010] After adopting the above structure, the beneficial effects of the present utility model are as follows: for the tweezer capable of reducing the damage rate of the LD laser chip according to the present utility model, when the present utility model is used, the stopper assembly is between the two arms of the tweezer, and the minimum opening of the tweezer is controlled by the blocking of the stopper assembly; the minimum distance at which the two arms of the tweezer body can approach each other is limited, and the tweezer body will not make the distance between the two arms of the tweezer body less than the width of the chip due to the increase of the hand force of the operator; the risk of chip fragmentation and damage when the tweezer clamps the chip is reduced, the feeding quality of the laser chip is improved, and the damage rate of the laser chip is reduced. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is a structural diagram of the tweezer body;

[0013] Figure 3 is Figure 2 an enlarged view of part Z in

[0014] Figure 4 is an exploded view of the stopper assembly;

[0015] Figure 5 is a structural diagram after the sliding pin is inserted into the sliding shaft;

[0016] Figure 6 is a first perspective three-dimensional view of the fixed cylinder;

[0017] Figure 7 is a second perspective three-dimensional view of the fixed cylinder;

[0018] Description of the Reference Numerals:

[0019] 1. Tweezer body; 101. Positioning groove; 102. Positioning hole; 2. Stopper assembly; A. Spring;

[0020] B. Sliding shaft; B1. Slide block; B101. Slide block tooth; B2. Pin sliding groove; C. Sliding pin;

[0021] D, Fixed cylinder; D1, External thread; D2, Positioning block; D201, Connecting threaded hole; D3, Anti-slip retaining ring;

[0022] D301, Retaining ring teeth; E, Knob; E1, Internal thread of the knob; E2, Scale line;

[0023] E3, Pin insertion hole. Detailed implementation mode

[0024] The present utility model will be further described below with reference to the accompanying drawings.

[0025] As Figures 1 to 7 shown, a pair of tweezers that can reduce the damage rate of LD laser chips according to the present utility model includes a tweezers main body 1; a blocking component 2 is arranged on one inner side wall of the tweezers main body 1;

[0026] The blocking component 2 is between the two arms of the tweezers. By the block of the blocking component 2, the minimum opening of the tweezers is controlled; the minimum distance that the two arms of the tweezers main body 1 can approach each other is limited, and the two arms of the tweezers main body 1 will not be less than the width of the chip due to the increase of the hand strength of the operator; the risk of chip cracking and damage when the tweezers grip the chip is reduced, the feeding quality of the laser chip is improved, and the damage rate of the laser chip is reduced.

[0027] The blocking component 2 is a telescopic component with adjustable length; the total length of the blocking component 2 can be adjusted according to the width of the chip to control the size of the minimum opening of the tweezers.

[0028] The blocking component 2 includes a knob E and a fixed cylinder D fixed on the tweezers main body 1; an internal thread E1 of the knob is arranged on the inner side wall of the knob E; an external thread D1 matching the internal thread E1 of the knob is arranged on the outer side wall of the fixed cylinder D; the external thread D1 is threadedly connected with the internal thread E1 of the knob; after the knob E is threadedly connected to the fixed cylinder D, the two form the blocking component 2; by rotating the internal thread E1 of the knob E on the external thread D1, the knob E can move along the axial direction of the fixed cylinder D, realizing the change of the total length of the blocking component 2. A braking switch module is arranged between the knob E and the fixed cylinder D; the braking switch module is used to lock and fix the knob E and the fixed cylinder D to prevent the internal thread E1 of the knob E from rotating on the external thread D1 during the working process and changing the size of the minimum opening of the tweezers, ensuring the stability of the minimum opening of the tweezers in the working state.

[0029] The braking switch module includes a sliding shaft B disposed inside a fixed cylinder D; an anti-slip retaining ring D3 is provided on the inner side wall of the fixed cylinder D; a slider B1 slidably connected to the inner cavity of the fixed cylinder D is fixed on the shaft body of the sliding shaft B; the sliding shaft B is slidably connected to the knob E; a spring A that presses the slider B1 against the anti-slip retaining ring D3 is disposed inside the fixed cylinder D; in the working state, the pressure of the spring A on the slider B1 presses against the anti-slip retaining ring D3, so that the sliding shaft B cannot rotate freely. Since the knob E can only slide in the axial direction of the sliding shaft B, the knob E cannot rotate freely relative to the fixed cylinder D either, realizing the locking and fixing of the knob E and the fixed cylinder D, and ensuring the stability of the minimum opening degree of the tweezers in the working state. However, when the total length of the telescopic assembly needs to be adjusted, since the pressure of the spring A on the slider B1 presses against the anti-slip retaining ring D3, the torque on the knob E needs to overcome the torque generated by the resistance of the slider B1 against the anti-slip retaining ring D3 in order to make the knob E rotate relative to the fixed cylinder D.

[0030] A plurality of retaining teeth D301 are evenly distributed on the surface of the anti-slip retaining ring D3 facing the slider B1; slider teeth B101 meshing with the retaining ring teeth D301 are provided on the surface of the slider B1 facing the anti-slip retaining ring D3; the cross-sections of the slider teeth B101 and the retaining ring teeth D301 are both triangular; the anti-slip retaining ring D3 and the slider B1 are meshed with each other through the engagement between the retaining ring teeth D301 and the slider teeth B101; through the biting force of the teeth, it is not easy for the anti-slip retaining ring D3 to rotate relative to the slider B1; since a wedge-shaped structure is formed between the surface of the triangular slider teeth B101 and the surface of the triangular retaining ring teeth D301, when the sliding shaft B receives a large torque, when the surface of the triangular slider teeth B101 slides relative to the surface of the triangular retaining ring teeth D301, an axial pressure is generated on the slider B1, and the slider B1 compresses the spring retainer A; the tooth tips of the retaining ring teeth D301 slide along the tooth surface of the slider teeth B101, enabling the anti-slip retaining ring D3 to be relative to the slider B1.

[0031] As a preferred embodiment of the present invention, a pin sliding groove B2 is formed on the sliding shaft B; the pin sliding groove B2 extends along the axial direction of the sliding shaft B; a sliding pin C is fixed on the knob E; the diameter of the sliding pin C is equal to the width of the pin sliding groove B2; the sliding pin C is snapped into the pin sliding groove B2.

[0032] The sliding connection between the knob E and the sliding shaft B is formed by using the sliding pin C and the pin sliding groove B2, enabling the transmission of torque between the sliding shaft B and the knob E, and the sliding of the knob E in the fixed cylinder D will not continuously push the sliding shaft B to move along the axial direction of the fixed cylinder D all the time, so that the slider B1 always closely adheres to the anti-slip retaining ring D3.

[0033] As a preferred embodiment of the present utility model, a pin insertion hole E3 matching the sliding pin C is formed on the side wall of the knob E; the sliding pin C is used as the component sliding in the pin sliding groove B2, which has low processing cost and is convenient for assembly.

[0034] As a preferred embodiment of the present utility model, a positioning block D2 is fixed at the bottom of the fixed cylinder D; a positioning groove 101 matching the positioning block D2 is formed on one side wall of the tweezer body 1; a positioning hole 102 is provided in the positioning groove 101; a connecting threaded hole D201 is provided on the positioning block D2; the positioning block D2 is inserted into the positioning groove 101; after a bolt passes through the positioning hole 102, it is threadedly connected to the connecting threaded hole D201; the fixed cylinder D is fixedly locked by inserting the positioning block D2 into the positioning groove 101 and then using a bolt, which is convenient for disassembly and assembly of the telescopic assembly.

[0035] As a preferred embodiment of the present utility model, scale lines E2 are evenly distributed on the outer side wall of the knob E; corresponding scale values are marked on the scale lines E2; the scale lines E2 are marked to facilitate observing and recording the current length of the telescopic assembly.

[0036] The above are only the preferred embodiments of the present utility model, so all equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present utility model are included in the scope of the patent application of the present utility model.

Claims

1. A pair of tweezers capable of reducing the damage rate of an LD laser chip, which comprises a pair of tweezers main body (1); characterized in that: One inner side wall of the tweezer body (1) is provided with a stop block assembly (2); the stop block assembly (2) is a telescopic assembly with adjustable length; the stop block assembly (2) includes a knob (E) and a fixed cylinder (D) fixed on the tweezer body (1); an inner side wall of the knob (E) is provided with an inner thread (E1) of the knob; an outer side wall of the fixed cylinder (D) is provided with an external thread (D1) matching the inner thread (E1) of the knob; the external thread (D1) is threadedly connected with the inner thread (E1) of the knob; a braking switch module is arranged between the knob (E) and the fixed cylinder (D); the braking switch module includes a sliding shaft (B) arranged inside the fixed cylinder (D); an inner side wall of the fixed cylinder (D) is provided with an anti-slip retaining ring (D3); a slider (B1) slidably connected to the inner cavity of the fixed cylinder (D) is fixed on the shaft body of the sliding shaft (B); the sliding shaft (B) is slidably connected with the knob (E); a spring (A) that presses the slider (B1) against the anti-slip retaining ring (D3) is arranged inside the fixed cylinder (D). A plurality of retaining ring teeth (D301) are evenly distributed on the surface of the anti-slip retaining ring (D3) facing the slider (B1); slider teeth (B101) meshing with the retaining ring teeth (D301) are arranged on the surface of the slider (B1) facing the anti-slip retaining ring (D3); the cross-sections of the slider teeth (B101) and the retaining ring teeth (D301) are both triangular.

2. A pair of tweezers capable of reducing the damage rate of an LD laser chip according to claim 1, characterized in that: A pin shaft sliding groove (B2) is formed on the sliding shaft (B); the pin shaft sliding groove (B2) extends along the axial direction of the sliding shaft (B); a sliding pin (C) is fixed on the knob (E); the diameter of the sliding pin (C) is equal to the width of the pin shaft sliding groove (B2); the sliding pin (C) is snapped into the pin shaft sliding groove (B2).

3. A pair of tweezers capable of reducing the damage rate of an LD laser chip according to claim 2, characterized in that: A pin shaft insertion hole (E3) matching the sliding pin (C) is formed on the side wall of the knob (E).

4. A pair of tweezers capable of reducing the damage rate of an LD laser chip according to claim 1, characterized in that: A positioning block (D2) is fixed at the bottom of the fixed cylinder (D); a positioning groove (101) matching the positioning block (D2) is formed on one side wall of the tweezer body (1); a positioning hole (102) is arranged in the positioning groove (101); a connecting threaded hole (D201) is arranged on the positioning block (D2); the positioning block (D2) is inserted into the positioning groove (101); a bolt passes through the positioning hole (102) and is then threadedly connected to the connecting threaded hole (D201).

5. A pair of tweezers capable of reducing the damage rate of an LD laser chip according to claim 1, characterized in that: Scale lines (E2) are evenly distributed on the outer side wall of the knob (E).

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