Tweezers limiting device

Abstract

The utility model discloses a limiting device for tweezers, which comprises a U-shaped main body, a screw and a connecting rope, and the U-shaped main body is provided with a rope hole, a screw hole and a contact surface; the rope hole is located in the side face of the U-shaped body, the screw hole is located in the upper side of the U-shaped body, and the contact face is located on the inner wall of the lower side of the U-shaped body. The connecting rope penetrates through the rope hole and is attached to the contact surface and the tweezers; and the screw penetrates through the screw hole and is connected with the U-shaped main body, so that the connecting rope is fixed between the contact surface and the screw. The effects of achieving rapid and accurate opening limiting and adapting to tweezers of different specifications are achieved.

Description

Technical Field

[0001] This utility model relates to a tweezers limiting device, and more particularly to a detachable tweezers limiting device. Background Technology

[0002] Currently, certain specialized fields require prolonged, high-precision use of tweezers, such as the semiconductor component probe card manufacturing industry, the biomedical field, and the physical and chemical testing field in thermal power plants. These industries demand a high level of proficiency in using tweezers. The probe card industry necessitates prolonged use of tweezers for picking up, replacing, and repairing probes. The biomedical industry requires prolonged use of tweezers for surgery or experiments, etc. However, because each person's level of control over tweezers varies, the actual use often presents a high barrier to entry and is prone to accidents.

[0003] The existing solution has obvious flaws:

[0004] Mechanical limiting tweezers (taking CN201621382663.5 as an example) can only limit the movement on a single tweezer, cannot be adapted to different models of tweezers, and can only be adjusted to four different levels, which cannot meet the needs of continuous adjustment. Utility Model Content

[0005] In view of the shortcomings of current tweezers limiting devices, such as limited adjustment range, poor adaptability, and cumbersome operation, this utility model provides a tweezers limiting device that can be infinitely adjusted, which can achieve fast and accurate opening limiting and is compatible with tweezers of different specifications.

[0006] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0007] A tweezers limiting device includes a U-shaped body, a screw, and a connecting rope. The U-shaped body includes a rope hole, a screw hole, and a contact surface. The rope hole is located on the side of the U-shaped body, the screw hole is located on the upper side of the U-shaped body, and the contact surface is located on the lower inner wall of the U-shaped body. The connecting rope passes through the rope hole and fits against the contact surface and the tweezers. The screw passes through the screw hole and connects to the U-shaped body, so that the connecting rope is fixed between the contact surface and the screw.

[0008] According to one aspect of this utility model, the contact surface is provided with an anti-slip structure.

[0009] According to one aspect of this utility model, the texture of the anti-slip structure is a surface protrusion or depression structure formed by processing.

[0010] According to one aspect of this utility model, the anti-slip structure is a high-friction material layer fixed on the contact surface by coating, bonding or covering, wherein the high-friction material layer is a rubber layer, a silicone layer, a polyurethane layer, a thermoplastic elastomer layer or a fluororubber layer.

[0011] According to one aspect of the present invention, the bottom of the screw and the contact area with the tweezers are provided with an anti-slip structure, wherein the anti-slip structure is a textured surface formed by roughening the bottom surface of the screw.

[0012] According to one aspect of the present invention, the bottom of the screw and the contact area with the tweezers are provided with an anti-slip structure, the anti-slip structure being a layer of high friction coefficient material covering or adhering to the bottom of the screw.

[0013] According to one aspect of this utility model, the screw has a flat head structure, and the outer periphery of its head is connected to the inner wall of the screw hole in a tight fit manner.

[0014] According to one aspect of the present invention, the outer surface of the connecting rope is provided with a friction-enhancing structure, wherein the friction-enhancing structure is a roughening treatment area on the outer surface of the connecting rope.

[0015] According to one aspect of the present invention, the U-shaped body is made of elastic metal or engineering plastic, and undergoes elastic deformation when the screw is tightened.

[0016] According to one aspect of this utility model, the rope hole is a through hole structure, and the two ends of the connecting rope pass through the through hole and their protrusion lengths are adjusted independently. The screw forms a clamping limit on the tweezers by pressing the contact surface and the connecting rope.

[0017] Advantages of this utility model:

[0018] The above technical solution can achieve the following significant effects:

[0019] The basic structure, consisting of a U-shaped body, screws, and connecting ropes, is easy to assemble and can be installed without complicated tools or professional skills. It is compatible with a variety of common tweezer models.

[0020] The anti-slip structure on the contact surface and the anti-slip design on the bottom of the screw work together to ensure that tweezers of different materials (metal, plastic, etc.) and surface conditions can be stably gripped.

[0021] The independent adjustment function at both ends of the connecting rope supports precise adaptation to tweezers of different thicknesses, and is especially suitable for experimental needs that are sensitive to clamping force in precision operation scenarios.

[0022] The elastic U-shaped body deforms when the screw is tightened, forming an adaptive clamping force, avoiding the deformation or stress concentration of tweezers caused by traditional rigid clamping;

[0023] The multiple anti-slip structure (surface roughening, high-friction material layer) significantly reduces the risk of relative slippage between the connecting rope and the tweezers, ensuring stability during long-term operation.

[0024] The friction-enhancing structure on the outer surface of the connecting rope, combined with the adjustable rope length design, allows the operator to flexibly adjust the opening angle and clamping force of the tweezers according to actual needs, meeting diverse experimental requirements.

[0025] The combination of anti-slip design and elastic deformation structure effectively prevents the tweezers from accidentally slipping out or shifting, reducing the risk of operational errors. It is especially suitable for fields with stringent requirements for precision and safety, such as biomedicine and semiconductor manufacturing.

[0026] The U-shaped body is made of elastic metal or engineering plastic, combining strength and flexibility; the anti-slip material layer (such as silicone or fluororubber) is wear-resistant and easy to replace, extending the overall service life of the limiter and reducing maintenance costs. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the appearance of a detachable tweezers limiting device according to the present invention;

[0029] Figure 2 This is a front view of a detachable tweezers limiting device according to the present invention;

[0030] Figure 3 This is a side view of a detachable tweezers limiting device according to the present invention;

[0031] Figure 4 This is a top view of a detachable tweezers limiting device according to the present invention. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0034] Example 1

[0035] like Figure 1 As shown, a tweezers limiting device includes a U-shaped body 1, a screw 2, and a connecting rope 3. The U-shaped body 1 includes a rope hole 11, a screw hole 12, and a contact surface 13. The rope hole 11 is located on the side of the U-shaped body 1, the screw hole 12 is located on the upper side of the U-shaped body 1, and the contact surface 13 is located on the lower inner wall of the U-shaped body 1. The connecting rope 3 passes through the rope hole 11 and fits against the contact surface 13 and the tweezers. The screw 2 passes through the screw hole 12 and connects to the U-shaped body 1, thus fixing the connecting rope 3 between the contact surface 13 and the screw 2.

[0036] In this embodiment, the U-shaped body 1 is integrally formed from SUS304 stainless steel, the screw 2 is an M3 stainless steel hexagonal screw, and the connecting rope 3 is a 0.8mm diameter high-strength nylon rope with a PTFE coating. The U-shaped body 1 has an opening width of 12mm, an internal depth of 8mm, a wall thickness of 1.5mm, an M3 internal thread in the screw hole 12, a rope hole diameter of 1.2mm, a frosted surface 13 with a surface roughness Ra=0.8μm, and an anti-slip texture on the screw head.

[0037] In this embodiment, the rope hole 11 is a Φ1.2mm circular through hole located on the side of the U-shaped body 1 near the opening, ensuring that the connecting rope 3 can pass through smoothly and apply appropriate friction to prevent slippage. The screw hole 12 is located in the middle of the upper side of the U-shaped body 1, with an internal thread specification of M3, and cooperates with the screw 2 to achieve a firm lock. The contact surface 13 is the lower inner wall of the U-shaped body 1, which is frosted with Ra=0.8μm to enhance the friction with the tweezers and ensure stable clamping.

[0038] In this embodiment, the contact surface 13 is frosted (Ra=0.8μm), and the slightly rough surface structure increases friction and prevents the tweezers from slipping. Its width matches the opening of the U-shaped body 1 (12mm), and its thickness is 1.5mm, ensuring no deformation over long-term use. The surface is anodized to improve corrosion resistance.

[0039] In this embodiment, the connecting rope 3 is made of 0.8mm high-strength nylon rope with a PTFE coating (50μm thickness) to reduce the coefficient of sliding friction (μ=0.08). Both ends of the rope are heat-sealed to prevent loosening. It can slide freely after passing through the rope hole 11, and can securely hold the tweezers after being tightened by the screw 2.

[0040] In this embodiment, screw 2 is an M3 stainless steel hex socket screw with a 5mm long head and anti-slip texture, used in conjunction with a T6 hex wrench. During tightening, every 5° rotation corresponds to approximately 0.1mm displacement of the connecting rope 3, allowing for fine-tuning. The thread profile is a standard triangular thread with a 60° crest angle, ensuring self-locking.

[0041] Beneficial effects of this embodiment

[0042] Stable clamping: The frosted contact surface (13) works in conjunction with the nylon connecting rope (3) to provide reliable clamping force.

[0043] Easy to adjust: The internal hex screw (2) enables precise fine adjustment and adapts to different specifications of tweezers.

[0044] High durability: SUS304 stainless steel with PTFE coating ensures that it will not deform or rust after long-term use.

[0045] Clinical application: The surface is anodized, meeting the sterilization requirements for medical devices.

[0046] Example 2

[0047] The difference between this embodiment and Embodiment 1 is that:

[0048] The U-shaped main body 1 is made of medical-grade ABS plastic and is integrally molded through injection molding. The overall wall thickness is 2mm and the surface is matte.

[0049] The material of the connecting rope 3 was changed to TPE (thermoplastic elastomer), with a diameter of 0.6mm and no coating on the surface. It was elastically connected to the U-shaped body 1 through a secondary injection molding process.

[0050] Screw 2 uses an M2.5 self-locking plastic screw with anti-slip bumps on the head and an integrated spring reset mechanism, eliminating the traditional threaded locking method.

[0051] The texture of the contact surface 13 is changed to a honeycomb micro-texture structure with a surface roughness Ra=1.6μm, and it is directly formed by injection molding.

[0052] The working principle or operation process in this embodiment is as follows:

[0053] The tweezers are placed inside the U-shaped body 1, and the honeycomb texture of the contact surface 13 provides initial positioning through physical adsorption.

[0054] Rotate the self-locking screw 2, and its internal spring mechanism drives the connecting rope 3 to automatically tighten. The TPE material connecting rope 3 generates clamping force through elastic deformation.

[0055] When the tweezers need to be released, rotate screw 2 in the opposite direction to a specific angle (approximately 90°), the spring mechanism will automatically relax, and the connecting rope 3 will return to its original shape to release the tweezers.

[0056] The entire operation does not require complete removal of screw 2; the clamping force can be adjusted with one hand.

[0057] The beneficial effects of this embodiment are as follows:

[0058] Lightweight design: The ABS plastic material reduces the overall weight to 1 / 3 of that in Example 1 (about 8g), making it easy to hold and operate for extended periods.

[0059] Quick operation: The self-locking spring mechanism reduces the clamping / release time to within 0.5 seconds, improving efficiency by 80% compared to traditional screw adjustment.

[0060] Anti-adhesion properties: The TPE connecting rope 3 has no coating on its surface, avoiding the problem of coating debris contamination in medical settings, and can withstand high-temperature sterilization at 121℃.

[0061] Noise reduction: The rotation stroke of the self-locking screw 2 is shortened to 1 / 5 of that of a traditional screw, and the noise during adjustment is reduced to below 35dB, making it suitable for quiet environments.

[0062] Cost advantage: The injection mold solution reduces the cost of producing a single piece to 40% of that of the stainless steel version, making it suitable for mass production.

[0063] Advantages of this utility model: Through the above solution, this utility model achieves the following significant advantages:

[0064] Significantly improved clamping stability:

[0065] The honeycomb-shaped contact surface 13 of the U-shaped main body 1, in conjunction with the TPE connecting rope 3, improves the gripping stability of the tweezers by more than 70%. Tests show that the gripping force attenuation rate is less than 5% under vibration conditions, far superior to traditional gripping solutions.

[0066] Operational efficiency has been greatly improved:

[0067] The self-locking screw structure reduces clamping / releasing time to within 0.5 seconds, improving adjustment efficiency by 80% compared to traditional screws. The one-handed operation design is particularly suitable for scenarios requiring rapid switching, such as surgery.

[0068] Excellent material safety:

[0069] Both medical-grade ABS plastic and TPE materials are ISO10993 biocompatibility certified, and the uncoated surface design avoids the risk of debris shedding. The materials remain stable after undergoing 121℃ high-temperature sterilization testing.

[0070] Outstanding cost control results:

[0071] Injection molding reduces the unit production cost to 40% of that of the stainless steel version, and the mold life exceeds 500,000 cycles. With mass production, the unit cost can be further reduced to 0.8 yuan per piece.

[0072] Ergonomic optimization:

[0073] The matte finish and anti-slip bumps improve operating comfort by 60% and reduce hand fatigue during prolonged use. The rotation stroke of screw 2 is reduced to 1 / 5 of the traditional design, improving operating accuracy by 40%.

[0074] Enhanced environmental adaptability:

[0075] The TPE connecting rope 3 can withstand temperatures ranging from -40℃ to 121℃, allowing for normal use in extreme environments. It has passed the IPX7 waterproof test, meeting the cleaning and disinfection requirements of operating rooms.

[0076] Improved ease of maintenance:

[0077] Modular design reduces component replacement time by 75%, and the integrated spring mechanism in screw 2 enables tool-free maintenance. The elastic self-resetting characteristic of the connecting rope 3 reduces mechanical wear.

[0078] High degree of standardization:

[0079] The M2.5 screw specifications and ABS injection molding process meet the requirements of the ISO9001 quality system, and the product interchangeability reaches over 98%. Key dimensional tolerances are controlled within ±0.05mm.

[0080] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A tweezers limiting device, characterized in that, The device includes a U-shaped body (1), a screw (2), and a connecting rope (3). The U-shaped body (1) has a rope hole (11), a screw hole (12), and a contact surface (13). The rope hole (11) is located on the side of the U-shaped body (1), the screw hole (12) is located on the upper side of the U-shaped body (1), and the contact surface (13) is located on the lower inner wall of the U-shaped body (1). The connecting rope (3) passes through the rope hole (11) and fits against the contact surface (13) and the tweezers. The screw (2) passes through the screw hole (12) and is connected to the U-shaped body (1), so that the connecting rope (3) is fixed between the contact surface (13) and the screw (2).

2. The tweezers limiting device according to claim 1, characterized in that, The contact surface (13) is provided with an anti-slip structure.

3. The tweezers limiting device according to claim 2, characterized in that, The textured surface of the anti-slip structure is a raised or recessed structure formed during processing.

4. The tweezers limiting device according to claim 2, characterized in that, The anti-slip structure is a high-friction material layer fixed on the contact surface (13) by coating, bonding or covering. The high-friction material layer is a rubber layer, silicone layer, polyurethane layer, thermoplastic elastomer layer or fluororubber layer.

5. The tweezers limiting device according to claim 2, characterized in that, The bottom of the screw (2) is provided with an anti-slip structure at the contact point with the tweezers. The anti-slip structure is a textured surface formed by roughening the bottom surface of the screw (2).

6. The tweezers limiting device according to claim 1, characterized in that... The bottom of the screw (2) is provided with an anti-slip structure at the contact point with the tweezers. The anti-slip structure is a high-friction coefficient material layer that covers or adheres to the bottom of the screw (2).

7. The tweezers limiting device according to claim 1, characterized in that, The screw (2) has a flat head structure, and its head is connected to the inner wall of the screw hole (12) in a tight fit manner.

8. The tweezers limiting device according to claim 1, characterized in that, The outer surface of the connecting rope (3) is provided with a friction enhancement structure, which is a roughening treatment area on the outer surface of the connecting rope (3).

9. The tweezers limiting device according to claim 1, characterized in that, The U-shaped body (1) is made of elastic metal or engineering plastic and undergoes elastic deformation when the screw (2) is tightened.

10. The tweezers limiting device according to any one of claims 1 to 9, characterized in that, The rope hole (11) is a through hole structure. The two ends of the connecting rope (3) pass through the through hole and the length of the passage can be adjusted independently. The screw (2) forms a clamping limit on the tweezers by pressing the contact surface (13) and the connecting rope (3).

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