A multi-segment gradient stretchable needle gauge

Abstract

This utility model discloses a multi-segment gradient telescopic needle gauge, including a housing handle with a blind hole at one end, within which a needle gauge assembly is housed. The needle gauge assembly includes an outer tube, inside which multiple inner tubes are sequentially fitted. The inner tubes can extend and retract axially within the outer tube, and the outer tube can also extend and retract axially within the housing handle. A first and second sliding groove are axially offset on the side wall of the housing handle, and a connecting groove is provided on the side wall of the housing handle. A locking block is provided on the side wall of the outer tube, with one end extending out of the housing handle. The locking block can slide within the first and second sliding grooves, and can abut against the end faces of the first and second sliding grooves respectively. A single needle gauge in this utility model can cover multiple sizes, reducing changeover time and making it easy to carry. Furthermore, it eliminates the need for external tools, allowing for size switching with one hand, thus improving operational convenience.

Description

Technical Field

[0001] This utility model relates to the field of needle gauge technology, specifically to a multi-segment gradient stretchable needle gauge. Background Technology

[0002] During the mold trial process, the screw post hole diameter of the molded product needs to be inspected on-site. This helps to determine whether the structural dimensions are acceptable in a timely manner, thereby improving the efficiency of the trial process. For example, products such as the mid-frame of a tablet computer have screw posts of various specifications. The inside of the screw posts is smooth, and the screw holes can only be achieved after the nuts are heat-fused. However, before heat-fused, it is usually necessary to determine whether the hole diameter is reasonable. Therefore, a pin gauge is needed on-site to measure the inner diameter of the screw posts.

[0003] Existing needle gauges are typically disc or pin-type: they use fixed-size needle gauges (e.g., 1.0-5.0mm, with a 0.1mm gradient), and the bore diameter is checked by inserting them one by one. This requires operators to carry multiple needle gauges. Existing disc-type needle gauges have the following drawbacks:

[0004] 1. Poor portability: It requires carrying a large number of needle gauges, resulting in low efficiency in on-site operations.

[0005] 2. Precision is easily compromised: Frequent replacement of needle gauges can lead to wear or rust (especially in high humidity environments).

[0006] 3. Inconvenient operation: Frequent changes of different size needle gauges are required during the testing process, which reduces testing efficiency. Utility Model Content

[0007] To address some or all of the problems existing in the prior art, this utility model provides a multi-segment gradient telescopic needle gauge, including a housing handle. One end of the housing handle has a blind hole, and a needle gauge assembly is disposed within the blind hole. The needle gauge assembly is telescopically slidably connected to the housing handle. The needle gauge assembly includes an outer tube, within which multiple inner tubes are sequentially sleeved, and all inner tubes are coaxially arranged with the outer tube. The inner tubes can extend and retract axially within the outer tube, and the outer tube can also extend and retract axially within the housing handle. A first sliding groove and a second sliding groove are axially offset distributed on the side wall of the housing handle. A connecting groove connecting the first and second sliding grooves is provided on the side wall of the housing handle. A locking block is provided on the side wall of the outer tube. One end of the locking block extends out of the housing handle after passing through the first or second sliding groove. The locking block can slide within the first and second sliding grooves, and the locking block can abut against the end faces of the first and second sliding grooves respectively.

[0008] As a further improvement of this utility model, an elastic element is provided inside the blind hole. The two ends of the elastic element are respectively connected to the outer shell handle and the outer sleeve. The elastic element can push the outer sleeve to move in the direction of extending out of the blind hole.

[0009] As a further improvement of this utility model, the elastic element is a metal helical spring, one end of which is fixedly connected to the inner side wall of the outer casing handle, and the other end abuts against the outer casing tube.

[0010] As a further improvement of this utility model, the inner sleeve includes a first inner tube and a second inner tube coaxially nested, the first inner tube being located between the outer sleeve and the second inner tube, one end of the first inner tube protruding from the end face of the outer sleeve, and one end of the second inner tube protruding from the end face of the first inner tube.

[0011] As a further improvement of this utility model, the outer diameters of the outer tube, the first inner tube and the second inner tube correspond to different gradient dimensions, with a gradient difference of 0.1-0.3 mm.

[0012] As a further improvement of this utility model, the end of the outer shell handle is provided with a hanging hole for connecting an anti-loss rope or hook.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. A single needle gauge in this utility model can cover multiple sizes, reducing change time and effectively improving trial molding efficiency. It is also easy to carry, eliminating the need to bring a reel of needle gauges to the trial molding site.

[0015] 2. Compared with disc-type and pin-type needle gauges, this utility model greatly reduces material costs by storing needle gauges individually instead of in a disc (100 gauges). It also avoids the loss of precision caused by frequent needle gauge replacements.

[0016] 3. This utility model is easy to operate and can be used to switch sizes with one hand without the need for external tools. The needle gauge assembly can be pushed out of the outer casing handle by pushing the locking block, and the required outer or inner sleeve can be pulled out to complete the measurement. Attached Figure Description

[0017] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the external structure of an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of an embodiment of this utility model;

[0020] Figure 3 This is an exploded structural diagram of an embodiment of the present invention. Detailed Implementation

[0021] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0022] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0024] like Figure 1-3As shown, a multi-segment gradient telescopic needle gauge includes a housing handle 1. One end of the housing handle 1 has a blind hole 11, within which a needle gauge assembly is housed. The needle gauge assembly is telescopically and slidably connected to the housing handle 1. The needle gauge assembly is stored inside the housing handle 1 for easy carrying and storage. The needle gauge assembly includes an outer tube 2, within which multiple inner tubes are sequentially fitted. All inner tubes are coaxially arranged with the outer tube 2, and the inner tubes can extend and retract axially within the outer tube 2, as can the outer tube 2. During use, the outer tube 2 is first pulled out from the housing handle 1. If the outer tube 2 is used to measure the aperture, it can be used directly after being pulled out. If the inner tube is used to measure the aperture, the corresponding inner tube is pulled out from the outer tube 2 after the outer tube 2 is pulled out, and then the aperture is measured using that inner tube. After use, push the inner sleeve back into the outer sleeve 2, and then push the outer sleeve 2 back into the outer casing handle 1. Use the outer casing handle 1 to store and preserve the needle gauge assembly.

[0025] This multi-segment gradient retractable needle gauge can cover multiple size application scenarios with a single needle gauge, reducing needle gauge change time and effectively improving trial molding efficiency. At the same time, pushing the needle gauge assembly into the housing handle 1 also makes it easy to carry the corresponding needle gauge, improving portability and eliminating the need to bring a reel of needle gauges to the trial molding site.

[0026] For ease of operation, in this embodiment, the side wall of the outer casing handle 1 is provided with a first sliding groove 12 and a second sliding groove 13 offset along the axial direction. The side wall of the outer casing handle 1 is provided with a connecting groove 14 that connects the first sliding groove 12 and the second sliding groove 13. The side wall of the outer casing tube 2 is provided with a locking block 3. One end of the locking block 3 passes through the first sliding groove 12 or the second sliding groove 13 and extends out of the outer casing handle 1. The locking block 3 can slide in the first sliding groove 12 and the second sliding groove 13, and the locking block 3 can abut against the end face of the first sliding groove 12 and the second sliding groove 13 respectively. Normally, the locking block 3 is located within the first slide groove 12, at which point the outer sleeve 2 retracts into the outer casing handle 1. When the needle gauge needs to be used, the locking block 3 is pushed along the first slide groove 12. After the locking block 3 slides to the end face of the first slide groove 12, it is pushed further along the connecting groove 14, causing the locking block 3 to slide into the second slide groove 13. Once it slides into the second slide groove 13, the locking block 3 is pushed along the second slide groove 13. During the sliding of the locking block 3 in the second slide groove 13, one end of the outer sleeve 2 will protrude from the end face of the outer casing handle 1. Then, the locking block 3 is pushed in until it abuts against the end face of the second slide groove 13, and then the outer sleeve 2 is used or the corresponding inner sleeve is pulled out from the outer sleeve 2 to measure the aperture. After use, the locking block 3 is pushed again to slide sequentially along the second slide groove 13, the connecting groove 14, and the first slide groove 12, thereby retracting the outer sleeve 2 back into the outer casing handle 1.

[0027] To ensure the needle gauge assembly can be fixed at the upper limit of the outer casing handle 1, an elastic element 4 is provided inside the blind hole 11. The two ends of the elastic element 4 are connected to the outer casing handle 1 and the outer sleeve 2, respectively. The elastic element 4 can push the outer sleeve 2 to move in the direction extending out of the blind hole 11. Normally, the locking block 3 is located in the first slide groove 12. The elastic force of the elastic element 4 pushes the locking block 3 to abut against the end face of the first slide groove 12, thus aligning the locking block 3 with the connecting groove 14. When the needle gauge needs to be used, the user only needs to push the locking block 3 to slide within the connecting groove 14, allowing the locking block 3 to enter the second slide groove 13 from the first slide groove 12. After the locking block 3 enters the second slide groove 13, the elastic force of the elastic element 4 pushes the outer sleeve 2 in the direction extending out of the blind hole 11, causing the locking block 3 to slide within the second slide groove 13 until the locking block 3 abuts against the end face of the second slide groove 13. At this point, one end of the outer sleeve 2 also extends out of the end face of the blind hole 11, after which the needle gauge assembly can be used to measure the hole diameter. After use, the locking block 3 can be pushed to slide in the reverse direction in the second slide groove 13, so that the outer tube 2 moves in the direction of extending into the blind hole 11. The outer tube 2 will compress the elastic element 4. When the locking block 3 slides to the position of the connecting groove 14, the outer tube 2 has been completely retracted into the outer shell handle 1. Then push it to slide in the connecting groove 14 until the locking block 3 slides into the first slide groove 12. The end face of the first slide groove 12 limits the position of the locking block 3, so that the outer tube 2 can be limited and fixed in the outer shell handle 1.

[0028] In this embodiment, the elastic element 4 is a metal helical spring. One end of the metal helical spring is fixedly connected to the inner wall of the outer casing handle 1, and the other end abuts against the outer casing tube 2. Under normal circumstances, the metal helical spring is in a compressed state, accumulating elastic potential energy. When the locking block 3 enters the second slide groove 13, the metal helical spring releases its elastic potential energy, thereby pushing the outer casing tube 2 to move out of the outer casing handle 1, causing the outer casing tube 2 to drive the inner casing tube out of the blind hole 11. In other embodiments, the elastic element 4 can also be other elastic structures or devices such as a spring sheet.

[0029] In this embodiment, the inner sleeve includes a first inner tube 5 and a second inner tube 6 coaxially nested. The first inner tube 5 is located between the outer outer tube 2 and the second inner tube 6. One end of the first inner tube 5 protrudes from the end face of the outer outer tube 2, and one end of the second inner tube 6 protrudes from the end face of the first inner tube 5. The inner sleeve protrudes from the outer sleeve to facilitate pulling out the inner sleeve and improve operational convenience. The sleeve structure of the needle gauge assembly can adopt any existing telescopic sleeve structure, such as the umbrella rib structure of a folding umbrella. In other embodiments, the number of inner sleeves can also be any other number, as long as all inner and outer outer tubes 2 are coaxially nested and the end face of the inner sleeve protrudes from the end face of the outer sleeve.

[0030] In this embodiment, the outer diameters of the outer sleeve 2, the first inner sleeve 5, and the second inner sleeve 6 correspond to different gradient dimensions, with a gradient difference of 0.1-0.3 mm and a preferred gradient difference of 0.2 mm. Through the nested outer sleeve 2 and multiple inner sleeves, this multi-segment gradient extendable pin gauge can be adapted to the measurement needs of screw studs with different hole diameters, improving versatility and avoiding the hassle of operators frequently searching for suitable pin gauges.

[0031] For easy carrying, a hanging hole 15 is provided at the end of the outer casing handle 1 for attaching an anti-loss lanyard or hook. By installing an anti-loss lanyard or hook in the hanging hole 15, it is easy to carry and store, and also easy to find the needle gauge, thus improving its practicality.

[0032] The above-described specific embodiments are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A multi-step gradient scalable gage pin, characterized by: Includes a housing handle, one end of which has a blind hole, and a needle gauge assembly is provided in the blind hole. The needle gauge assembly is telescopically and slidably connected to the housing handle. The needle gauge assembly includes an outer tube, and multiple inner tubes are sequentially sleeved inside the outer tube. All inner tubes are coaxially arranged with the outer tube. The inner tubes can extend and retract axially within the outer tube, and the outer tube can extend and retract axially within the outer shell handle. The outer casing handle has a first sliding groove and a second sliding groove distributed axially offset on its side wall. The outer casing handle has a connecting groove that connects the first sliding groove and the second sliding groove. The outer casing tube has a locking block on its side wall. One end of the locking block passes through the first sliding groove or the second sliding groove and extends out of the outer casing handle. The locking block can slide in the first sliding groove and the second sliding groove, and the locking block can abut against the end face of the first sliding groove and the second sliding groove, respectively.

2. The multi-step gradient scalable gage pin of claim 1, wherein: An elastic element is provided inside the blind hole. The two ends of the elastic element are respectively connected to the outer shell handle and the outer sleeve. The elastic element can push the outer sleeve to move out of the blind hole.

3. The multi-step gradient scalable gage pin of claim 2, wherein: The elastic element is a metal helical spring, one end of which is fixedly connected to the inner wall of the outer casing handle, and the other end abuts against the outer casing tube.

4. The multi-step gradient scalable gage pin of claim 1, wherein: The inner sleeve includes a first inner tube and a second inner tube that are coaxially nested. The first inner tube is located between the outer sleeve and the second inner tube. One end of the first inner tube protrudes from the end face of the outer sleeve, and one end of the second inner tube protrudes from the end face of the first inner tube.

5. The multi-step gradient scalable gage pin of claim 4, wherein: The outer diameters of the outer tube, the first inner tube, and the second inner tube correspond to different gradient dimensions, with a gradient difference of 0.1-0.3 mm.

6. The multi-step gradient scalable gage of claim 1, wherein: The end of the outer casing handle is provided with a hanging hole for connecting an anti-loss rope or hook.

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