Limiting tweezers clamp

Abstract

The utility model relates to a limiting tweezers clamp, and relates to the technical field of COS packaging, the limiting tweezers clamp comprises two tweezers legs, one ends of the two tweezers legs are fixed, the other ends of the tweezers legs are provided with tweezers feet, the tweezers feet are provided with two threaded holes, the tweezers legs are provided with mounting holes corresponding to the threaded holes in position, and fixing screws are arranged in the mounting holes in a penetrating mode. The fixing screws are in threaded connection with the threaded holes, limiting blocks are fixed to the opposite sides of the two tweezers feet, the sides, facing the clamping ends of the tweezers feet, of the limiting blocks are planes, and the distance between the limiting blocks and the clamping ends of the tweezers feet is smaller than the thickness of the COS. Through the arrangement of the limiting blocks, after the tweezers feet are clamped on the two sides of the COS through the clamping ends, the planes of the limiting blocks abut against the top face of the COS, and when the COS makes contact with welding flux, it can be guaranteed that the clamping ends of the tweezers feet do not exceed the bottom of the COS, the limiting blocks can apply downward force to the COS, material dipping is sufficient, the problems of reworking and product quality are solved, and operation is easy and convenient.

Description

Technical Field

[0001] The present application relates to the field of COS packaging technology, and in particular to a limiting tweezers clamp. Background Art

[0002] Chip-on-submount (COS) packaging enables highly integrated and miniaturized chips, making these mobile devices thinner, lighter, and more energy-efficient. Due to its small size, COS soldering requires the use of jigs and tweezers in non-mass production.

[0003] The utility model patent with announcement number CN207282904U discloses a semiconductor laser packaging fixture, including: a base, a COS, a slide rail, a guide column, a cross column, a slide plate and a spring. The slide rail is moved to the outermost side, and the laser tube shells are placed one by one in the groove. A low-temperature solder sheet is placed on the tube tongue. The COS is placed in the middle position of the tube tongue, and the front end of the COS is flush with the front end of the tube tongue. The slide plate is pulled upward so that the lower end of each pressure column is higher than the upper end surface of the COS, and the slide rail is pushed inward at the same time. When the pressure column is directly above the COS, the spring will push the slide plate downward, so that each pressure column presses the COS against the upper surface of the tube tongue, and then sintering is carried out. After sintering is completed, the slide rail is pulled outward again to remove the sintered semiconductor laser.

[0004] Regarding the aforementioned related technologies, the inventors believe that when a COS is encapsulated in a housing, it needs to be picked up with tweezers, dipped in molten solder, and then placed in the housing to adhere to the COS. While conventional tweezers can pick up the COS, they cannot apply downward force to the COS during solder dipping. The COS can only be moved back and forth against the soldering surface by the friction of the clamping force. During this process, the end of the tweezers easily extends beyond the COS, creating a gap at the bottom and resulting in insufficient solder dipping. Utility Model Content

[0005] The present application provides a limiting tweezers clamp, which can prevent the end of the tweezers from exceeding the COS, and there will be no gap at the bottom of the COS, ensuring sufficient dipping.

[0006] The present application provides a limiting tweezers clamp, which adopts the following technical solution:

[0007] The limiting tweezers clamp includes two tweezers legs, which are fixed by one end, and a tweezers foot is installed at the other end of the tweezers leg. Two threaded holes are provided on the tweezers foot, and mounting holes corresponding to the positions of the threaded holes are provided on the tweezers legs. Fixing screws are passed through the mounting holes, and the fixing screws are threadedly connected to the threaded holes. A limiting block is fixed on the side of the two tweezers feet that are directly opposite to each other, and the side of the limiting block facing the clamping end of the tweezers foot is flat, and the distance between the limiting block and the clamping end of the tweezers foot is less than the thickness of COS.

[0008] By adopting the above technical solution and setting a limit block, when the tweezers are clamped on both sides of the COS through the clamping ends, the plane of the limit block is pressed against the top surface of the COS. When the COS contacts the solder, it can ensure that the clamping ends of the tweezers will not exceed the bottom of the COS, and the limit block can apply a downward force to the COS, so that the material is fully dipped, avoiding rework and product quality problems.

[0009] Optionally, a mounting groove is provided on the tweezers leg, and the shape of the mounting groove is adapted to the tweezers foot.

[0010] By adopting the above technical solution, the end of the tweezers foot is placed in the installation groove to achieve a positioning effect, and the stability of the tweezers foot and the tweezers leg after installation is improved.

[0011] Optionally, a through hole is respectively provided on the two tweezers legs, and an adjusting rod is respectively passed through the two through holes. The ends of the adjusting rods facing away from each other are fixed with limiting plates, and a threaded rod is fixed at the end of one of the adjusting rods, and the threaded rod is threadedly connected to the other adjusting rod.

[0012] By adopting the above technical solution, the limit plate is used to prevent the adjusting rod from detaching from the through hole. After the two adjusting rods rotate relative to each other, the threaded rod causes the two adjusting rods to move closer or farther away through the threaded connection, thereby adjusting the distance between the two limit plates, thereby adjusting the maximum angle that the two tweezers legs can open. By adjusting the maximum angle when using tweezers, the ineffective travel of the two tweezers legs when they are close to each other can be reduced, thereby improving the efficiency of use.

[0013] Optionally, sleeves are respectively fixed to the sides of the two adjusting rods that are close to each other, and the two sleeves are sleeved with each other.

[0014] By adopting the above technical solution, the internal threaded rod is covered and hidden by the sleeve, and the two tweezers legs will not be stuck in the perforation of the threaded rod when they approach the rear threaded rod, and the sleeve can guide the relative movement of the two adjustment rods.

[0015] Optionally, a straight-shaped screw groove is provided on the limiting piece.

[0016] By adopting the above technical solution, the user can not only twist the screw groove with a screwdriver, but also twist the screw groove with fingernails, which is more convenient.

[0017] Optionally, a plurality of slots are provided on the side wall edges of the two tweezers legs that are away from each other. The slots are arranged and distributed along the length direction of the tweezers legs, and the bottom walls of the slots are arc surfaces.

[0018] By adopting this technical solution, the slot can be inserted into an external rope, ring, etc., thereby preventing the two tweezers from moving away from each other. When the tweezers clamp an object, this method can maintain the tweezers' grip on the object, and can also maintain this position when the hand releases the tweezers, thus improving functionality. In addition, the slot also has a non-slip effect when it comes into contact with the finger.

[0019] Optionally, an elastic ring is commonly provided on the outside of the two tweezers legs, and the inner wall of the elastic ring is embedded in the card slot.

[0020] By adopting the above technical solution, the user pulls the elastic ring toward the tweezers legs, causing the elastic ring to expand and enter the next set of slots, thereby increasing the pressure of the elastic ring on the two tweezers legs, prompting the two tweezers legs to clamp the object. This state can be maintained even if the user lets go of the tweezers legs, making it convenient to do other things.

[0021] Optionally, the two tweezers legs are integrally formed through the fixed end, and the two tweezers legs are formed by bending a single rod.

[0022] By adopting the above technical solution, the two tweezers legs are formed by bending a single rod, have good integrity, have higher strength, are not easy to break, and have better elasticity.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By setting the limit block, when the tweezers are clamped on both sides of the COS through the clamping end, the flat surface of the limit block is pressed against the top surface of the COS. When the COS contacts the solder, it can ensure that the clamping end of the tweezers will not exceed the bottom of the COS.

[0025] 2. The limit block can exert downward force on the COS, so that the material is fully dipped, avoiding rework and product quality problems, and the operation is also simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional diagram of the limiting tweezers fixture of Example 1;

[0027] Figure 2 It is a partial exploded view of Example 1;

[0028] Figure 3 This is a diagram of the use state of the limit block of Example 1;

[0029] Figure 4 is a partial cross-sectional view of embodiment 1;

[0030] Figure 5 It is a three-dimensional diagram of the limiting tweezers clamp of the second embodiment.

[0031] Explanation of the accompanying reference numerals: 1. Tweezers leg; 2. Tweezers foot; 11. Mounting slot; 21. Threaded hole; 12. Mounting hole; 3. Fixing screw; 22. Limiting block; 13. Through hole; 4. Adjusting rod; 41. Limiting piece; 42. Threaded rod; 43. Twist groove; 44. Sleeve; 14. Card slot; 5. Elastic ring. DETAILED DESCRIPTION

[0032] The present application is further described in detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] Reference Figure 1 This embodiment discloses a position-limiting tweezers fixture comprising two tweezer legs 1, each of which is fixed at one end and has a tweezer foot 2 mounted at the other end. The two tweezer legs 1 are integrally formed with the fixed end and are formed by bending a single rod, resulting in good integrity, higher strength, less breakage, and improved elasticity.

[0035] Reference Figure 2 The tweezers leg 1 has a mounting slot 11 whose shape matches the tweezers foot 2. When the end of the tweezers foot 2 is placed in the mounting slot 11, it provides a positioning effect and improves the stability of the tweezers foot 2 and the tweezers leg 1 after installation. The tweezers foot 2 has two threaded holes 21, and the tweezers leg 1 has a mounting hole 12 corresponding to the position of the threaded holes 21. The mounting holes 12 are penetrated by a set screw 3, which is threadedly connected to the threaded hole 21. The two set screws 3 on each tweezers foot 2 prevent relative rotation between the tweezers foot 2 and the tweezers leg 1. The mounting holes 12 are countersunk, and the screw heads of the set screws 3 do not protrude from the surface of the tweezers leg 1.

[0036] Reference Figure 3 A limit block 22 is fixed on the side where the two tweezers legs 2 face each other. The side of the limit block 22 facing the clamping end of the tweezers legs 2 is a plane, and the distance between the limit block 22 and the clamping end of the tweezers legs 2 is less than the thickness of the COS. The end of the tweezers legs 2 away from the tweezers leg 1 is the clamping end. When the tweezers legs 2 are clamped on both sides of the COS through the clamping end, the plane of the limit block 22 is pressed against the top surface of the COS, so that the limit block 22 can push the COS to move. When the COS contacts the solder, it can ensure that the clamping end of the tweezers legs 2 will not exceed the bottom of the COS, and the limit block 22 can apply a downward force to the COS, so that the material is fully dipped, avoiding rework and product quality problems.

[0037] Reference Figure 4The two tweezers legs 1 each have a through-hole 13, each of which is passed through by an adjustment rod 4. A limit plate 41 is fixed to the opposing ends of the adjustment rods 4. A threaded rod 42 is fixed to the end of one adjustment rod 4, which is threadedly connected to the other adjustment rod 4. The limit plate 41 is sized to prevent the adjustment rod 4 from being dislodged from the through-hole 13. It should be noted that the diameter of the through-hole 13 is larger than the outer diameter of the adjustment rod 4, allowing the adjustment rod 4 to swing within the through-hole 13.

[0038] The limiting piece 41 is provided with a straight groove 43, and the user can not only use a screwdriver to twist the groove 43, but also use fingernails to twist the groove 43, which is more convenient; after the two adjusting rods 4 rotate relative to each other, the threaded rod 42 causes the two adjusting rods 4 to move closer or farther away through the threaded connection, thereby adjusting the distance between the two limiting pieces 41, thereby adjusting the maximum angle that the two tweezers legs 1 can open. By adjusting the maximum angle when using tweezers, the ineffective stroke of the two tweezers legs 1 when they are close can be reduced, thereby improving the use efficiency.

[0039] A sleeve 44 is fixed to each side of the two adjusting rods 4 that are close to each other, and the two sleeves 44 are connected to each other. The sleeves 44 cover and hide the internal threaded rod 42, so that the threaded rod 42 will not get stuck in the perforation 13 when the two tweezers legs 1 are close to each other, and the sleeves 44 can guide the relative movement of the two adjusting rods 4.

[0040] Reference Figure 1 The side edges of the two tweezers legs 1, where they face away from each other, are provided with multiple retaining grooves 14. These grooves 14 are arranged along the length of the legs 1, and their bottom walls are arc-shaped. These grooves 14 allow for the insertion of external cords, loops, or other devices, thereby restraining the two tweezers legs 1 from moving apart. This ensures that the tweezers legs 2 remain in this grip when they grasp an object, even when the tweezers legs 1 are released, enhancing functionality. Furthermore, the retaining grooves 14 provide a non-slip effect when in contact with fingers.

[0041] The implementation principle of a limiting tweezers clamp in an embodiment of the present application is: by setting a limiting block 22, when the tweezers foot 2 is clamped on both sides of the COS through the clamping end, the plane of the limiting block 22 is pressed against the top surface of the COS. When the COS contacts the solder, it can ensure that the clamping end of the tweezers foot 2 will not exceed the bottom of the COS, and the limiting block 22 can apply a downward force to the COS, so that the material is fully dipped, avoiding rework and product quality problems, and the operation is also simple and convenient.

[0042] Example 2

[0043] Reference Figure 5A second embodiment of a position-limiting tweezers clamp differs from the first embodiment in that an elastic ring 5 is sheathed around both tweezer legs 1. The inner wall of the elastic ring 5 is embedded in a retaining groove 14. The arc-shaped bottom wall of the retaining groove 14 is less likely to damage the elastic ring 5. The elastic ring 5 is an optional accessory. The user pulls the elastic ring 5 toward the tweezer legs 2, causing it to expand and enter the next set of retaining grooves 14. This increases the pressure of the elastic ring 5 on the two tweezer legs 1, forcing them to clamp the object. This position can be maintained even if the user releases the tweezer legs 1, making it easier to do other things.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. The limited tweezers fixture is characterized by: The invention comprises two tweezers legs (1), wherein the two tweezers legs (1) are fixed at one end, and a tweezers foot (2) is installed at the other end of the tweezers leg (1), wherein two threaded holes (21) are provided on the tweezers foot (2), and a mounting hole (12) corresponding to the position of the threaded hole (21) is provided on the tweezers leg (1), and a fixing screw (3) is passed through the mounting hole (12), and the fixing screw (3) is threadedly connected to the threaded hole (21), and a limiting block (22) is fixed on the side of the two tweezers feet (2) facing each other, and the side of the limiting block (22) facing the clamping end of the tweezers foot (2) is a plane, and the distance between the limiting block (22) and the clamping end of the tweezers foot (2) is less than the thickness of COS.

2. The position limiting tweezers clamp according to claim 1, characterized in that: The tweezers leg (1) is provided with a mounting groove (11), and the shape of the mounting groove (11) is adapted to the tweezers foot (2).

3. The position limiting tweezers clamp according to claim 1, characterized in that: The two tweezers legs (1) are respectively provided with a through hole (13), and the two through holes (13) are respectively provided with an adjusting rod (4), and the ends of the adjusting rods (4) facing away from each other are fixed with a limiting piece (41), and the end of one of the adjusting rods (4) is fixed with a threaded rod (42), and the threaded rod (42) is threadedly connected to the other adjusting rod (4).

4. The position limiting tweezers fixture according to claim 3, characterized in that: A sleeve (44) is fixed on each side of the two adjusting rods (4) close to each other, and the two sleeves (44) are sleeved with each other.

5. The position limiting tweezers fixture according to claim 3, characterized in that: The limiting piece (41) is provided with a straight-line screwing groove (43).

6. The position limiting tweezers fixture according to claim 1, characterized in that: A plurality of slots (14) are provided on the sidewall edges of the two tweezers legs (1) that are away from each other. The slots (14) are arranged and distributed along the length direction of the tweezers legs (1), and the bottom walls of the slots (14) are arc surfaces.

7. The position limiting tweezers fixture according to claim 6, characterized in that: An elastic ring (5) is commonly sleeved on the outside of the two tweezers legs (1), and the inner wall of the elastic ring (5) is embedded in the card slot (14).

8. The position limiting tweezers fixture according to claim 1, characterized in that: The two tweezers legs (1) are integrally formed through the fixed end, and the two tweezers legs (1) are formed by bending a single rod.

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