Compasses with sliding type needle retracting structure

Abstract

The utility model discloses a pair of compasses with a sliding type needle retracting structure, which comprises a main supporting leg and a rotating supporting leg which are rotationally connected with each other, a pen body is arranged on the rotating supporting leg, the sliding type needle retracting structure comprises a sliding inner cavity and a sliding pushing piece, the sliding inner cavity is arranged inside the main supporting leg, a notch is arranged on one side of the sliding inner cavity, and a needle outlet is arranged at the lower end of the sliding inner cavity. The sliding pushing piece is arranged in the sliding inner cavity in a sliding mode, at least part of the sliding pushing piece penetrates through the notch and then extends out of the main supporting leg, the fixing needle is arranged at one end of the sliding pushing piece and has a needle withdrawing state and a needle hiding state, and in the two states, the sliding pushing piece and the main supporting leg are each provided with a positioning structure matched to relatively fix the sliding pushing piece and the main supporting leg. After the compasses are used, hidden storage of the fixing needle can be achieved, a protective sleeve does not need to be additionally sleeved, the fixing needle cannot be rusted due to exposure, a user can complete switching between a needle hiding state and a needle withdrawing state by pressing and pushing the sliding push piece, switching is convenient, and safety performance is good.

Description

Technical Field

[0001] This utility model relates to the field of stationery technology, and in particular to a compass with a sliding needle retraction structure. Background Technology

[0002] A compass is a tool used to draw circles, commonly used in drafting, mapping, and engineering to ensure accurate circles or arcs. In schools and workplaces, the compass is a common drawing tool used in a wide range of scientific, mathematical, and engineering applications.

[0003] A compass typically consists of two legs. One leg has a fixed pin, and the other leg has a lead attached. When drawing a circle, the fixed pin is positioned at the center point. The distance between the lead and the fixed pin is adjustable, allowing users to draw circles with a specific radius on a flat surface. Currently, the fixed pin on most compasses is secured to the lower end of the leg with screws or clips, and some pins are removable. Because the pin tip is sharp, a protective cover is usually placed over it after use for safety. However, in practice, this cover is often lost. If the compass is not stored in its case, there is a risk of pricking one's finger when retrieving it. Furthermore, since the pins on most compasses are exposed, they are prone to rust or wear after prolonged use, necessitating structural improvements. Utility Model Content

[0004] To solve the above problems, this utility model proposes a compass with a sliding needle retraction structure.

[0005] The technical solution adopted in this utility model is: a compass with a sliding needle-retracting structure, comprising a main support leg and a rotating support leg rotatably connected to each other, a pen body being mounted on the rotating support leg, the extension direction of the main support leg being set as a first direction, and the sliding needle-retracting structure comprising:

[0006] A sliding inner cavity is disposed inside the main support leg and arranged along a first direction. One side of the sliding inner cavity is provided with a groove extending along the first direction, and one end of the sliding inner cavity is provided with a needle outlet.

[0007] A sliding pusher is slidably disposed in the sliding inner cavity. At least a portion of the sliding pusher passes through the slot and extends to the outside of the main support leg. A fixing pin is fixedly provided at one end of the sliding pusher.

[0008] The fixed needle has a needle-out state in which it is pushed downwards out of the needle outlet along with the sliding pusher, and a needle-hidden state in which it is hidden in the sliding inner cavity. In both the needle-out and needle-hidden states, the sliding pusher and the main support leg have a positioning structure that cooperates to fix them relatively.

[0009] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0010] Preferably, the sliding pusher includes:

[0011] The sliding body is slidably disposed within the sliding inner cavity;

[0012] A pressing member is elastically connected to the sliding body, and at least a portion of the pressing member extends outside the main support leg. The positioning structure is disposed between the pressing member and the slot.

[0013] Preferably, the pressing element includes:

[0014] A spring-loaded rod extends along a first direction, one end of which is fixedly connected to the sliding body, and the other end is provided with a connecting block, which passes through the slot.

[0015] The push block is fixed on the connecting block and is located outside the main support leg.

[0016] Preferably, in the needle-concealed state, the upper end of the connecting block abuts against the upper end of the inner wall of the slot; in the needle-exit state, the lower end of the connecting block abuts against the lower end of the inner wall of the slot.

[0017] Preferably, a fixing block is provided below the sliding body, and the fixing pin is fixed to the lower end of the fixing block.

[0018] Preferably, the front end surface of the push block is provided with anti-slip texture.

[0019] Preferably, the positioning structure includes a positioning block disposed on one side of the connecting block, and at least one first notch and at least one second notch disposed on the edge of the slot. The first notch is arranged above the second notch. In the needle-hidden state, the positioning block is engaged into the first notch, and in the needle-out state, the positioning block is engaged into the second notch.

[0020] Preferably, there are two first notches, which are arranged in a left-right alignment along the edge of the slot; there are two second notches, which are arranged in a left-right alignment along the edge of the slot; and there are two positioning blocks, which are arranged in a left-right alignment on the left and right sides of the connecting block.

[0021] More preferably, the compass also includes a compass head, and the main support leg and the rotating support leg are rotatably mounted on the compass head, with a hand-held portion provided at the upper end of the compass head.

[0022] Compared with the prior art, this utility model has the following beneficial effects:

[0023] By creating a slot on the main support rod of the compass and sliding a pusher inside, the user needs to press the push block backward to activate the compass. This causes the spring-loaded rod to elastically deform, disengaging the positioning block from the first notch. The push block can then be pushed downward (the spring-loaded rod maintains its elastic deformation throughout this process) until the fixed needle extends below the needle outlet. Releasing the push block allows the spring-loaded rod to return to its original shape, and the positioning block re-enters the second notch, switching to the needle-out state. Similarly, to switch to the needle-concealed state, the user presses the push block and pushes it upward until the positioning block re-enters the first notch. After use, the fixed needle can be concealed, eliminating the need for an additional protective cover and preventing rust due to exposure. The system offers convenient switching between concealed and extended needle states, good safety features, and strong practicality. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure from the left side in the needle-hidden state in Embodiment 1 of this application;

[0026] Figure 2 for Figure 1 Enlarged view of part A in the image;

[0027] Figure 3 This is a schematic diagram of the overall structure from the left side in the needle-out state in Embodiment 1 of this application;

[0028] Figure 4 for Figure 3 Enlarged view of part B in the image;

[0029] Figure 5This is a schematic diagram of the overall structure from the right side view in the needle-hidden state in Embodiment 1 of this application;

[0030] Figure 6 This is an overall structural diagram of the first embodiment of this application after concealing the sliding pusher and the fixing pin;

[0031] Figure 7 This is an assembly structure diagram of the main support leg, sliding pusher and fixed needle in the needle-hidden state in Embodiment 1 of this application;

[0032] Figure 8 This is an assembly structure diagram of the sliding pusher and the fixing pin in Embodiment 1 of this application;

[0033] Figure 9 This is a side view of the assembly of the sliding pusher and the fixing pin in Embodiment 1 of this application;

[0034] Figure 10 This is a schematic diagram of the overall structure in the needle-hidden state in Embodiment 2 of this application;

[0035] Figure 11 This is a schematic diagram of the overall structure in the needle-out state in Embodiment 2 of this application;

[0036] Figure 12 This is a schematic diagram of the overall structure in the needle-hidden state in Embodiment 3 of this application;

[0037] Figure 13 This is a schematic diagram of the overall structure in the needle-out state in Embodiment 3 of this application.

[0038] The attached diagram is labeled as follows: 1-compass head, 2-main support leg, 21-sliding inner cavity, 22-groove, 221-first notch, 222-second notch, 23-needle outlet, 3-rotating support leg, 4-sliding pusher, 41-sliding body, 411-anti-slip texture, 42-spring pressure rod, 43-connecting block, 44-push block, 45-positioning block, 46-fixing block, 5-fixing needle, 6-hand grip, 7-first pen body, 71-first mounting block, 8-second pen body, 81-second mounting block, 9-third pen body, 91-third mounting block, 92-socket seat, 93-adjusting component.

[0039] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] 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.

[0041] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0043] Specific implementation plan:

[0044] Example 1: See Figures 1-9 This utility model is a compass with a sliding needle-retracting structure, including a main support leg 2 and a rotating support leg 3 rotatably connected to each other. A pen body is mounted on the rotating support leg 3. The extension direction of the main support leg 2 is set as the first direction. The sliding needle-retracting structure includes:

[0045] The sliding inner cavity 21 is located inside the main support leg 2 and is arranged along the first direction. One side of the sliding inner cavity 21 is provided with a slot 22 extending along the first direction, and one end of the sliding inner cavity 21 is provided with a needle outlet 23.

[0046] The sliding pusher 4 is slidably disposed in the sliding inner cavity 21. At least part of the sliding pusher 4 passes through the slot 22 and extends to the outside of the main support leg 2. A fixing pin 5 is fixedly provided at one end of the sliding pusher 4.

[0047] The fixed needle 5 has a needle-out state where it is pushed downwards out of the needle outlet 23 following the sliding pusher 4, and a needle-hidden state where it is hidden in the sliding inner cavity 21. In both the needle-out and needle-hidden states, the sliding pusher 4 and the main support leg 2 have a positioning structure that works together to fix them relatively.

[0048] As a preferred embodiment of this example, please refer to Figure 7 The sliding pusher 4 includes:

[0049] The sliding body 41 is slidably disposed in the sliding inner cavity 21;

[0050] The pressing element is elastically connected to the sliding body 41, and at least part of the pressing element extends to the outside of the main support leg 2. The positioning structure is set between the pressing element and the slot 22.

[0051] Then, please see Figure 8 and Figure 9 The pressing component includes:

[0052] A spring-loaded rod 42 extends along a first direction. One end of the spring-loaded rod 42 is fixedly connected to the sliding body 41, and the other end is provided with a connecting block 43, which passes through the slot 22.

[0053] Push block 44 is fixed on connecting block 43 and is located outside the main support leg 2.

[0054] Note that in this embodiment, since the sliding pusher 4 is made of plastic and the spring rod 42 extends in the first direction in the shape of a rod, when the free end of the spring rod 42 is pressed, the spring rod 42 can undergo a certain deformation. Within a certain range, this deformation will not cause the connection between the spring rod 42 and the sliding body 41 to break.

[0055] As another preferred embodiment of this example, please refer to Figures 1-6 The positioning structure includes a positioning block 45 disposed on one side of the connecting block 43, and at least one first notch 221 and at least one second notch 222 disposed on the edge of the slot 22. The first notch 221 is arranged above the second notch 222. In the needle-hidden state, the positioning block 45 is engaged into the first notch 221. In the needle-out state, the positioning block 45 is engaged into the second notch 222.

[0056] Next, please refer to Figures 1-4 As can be seen in this embodiment, in the needle-hidden state, the upper end of the connecting block 43 abuts against the upper end of the inner wall of the slot 22; in the needle-out state, the lower end of the connecting block 43 abuts against the lower end of the inner wall of the slot 22.

[0057] The working principle of the sliding needle take-up structure is explained below:

[0058] Please see Figure 1 and Figure 2At this time, the fixed needle 5 is in the hidden needle state, and the positioning block 45 is engaged in the first notch 221. When the user needs to use the compass, he / she needs to press the push block 44 backward, causing the spring rod 42 to deform elastically. The positioning block 45 disengages from the first notch 221. Then, the push block 44 can be pushed down (during this process, the positioning block 45 abuts against the inner wall of the sliding inner cavity 21, and the spring rod 42 maintains elastic deformation) until the fixed needle 5 extends below the needle outlet 23 (the lower end of the connecting block 43 abuts against the lower end of the inner wall of the slot 22). Release the pressing block, the spring rod 42 returns to its original deformation, and the positioning block 45 enters the second notch 222, thus switching to the needle outlet state.

[0059] When the user needs to switch back to the hidden needle state, they need to press the push block 44 again, causing the spring rod 42 to deform elastically and the positioning block 45 to disengage from the second notch 222. At this time, the push block 44 can be pushed upward (during this process, the positioning block 45 abuts against the inner wall of the sliding inner cavity 21, and the spring rod 42 maintains elastic deformation) until the fixed needle 5 is completely hidden in the sliding inner cavity 21 (the upper end of the connecting block 43 abuts against the upper end of the inner wall of the slot 22). Release the press block, the spring rod 42 returns to its original deformation, and the positioning block 45 enters the first notch 221, thus switching to the hidden needle state.

[0060] Then, in this embodiment, there are two first notches 221, which are arranged in a left-right alignment on the edge of the slot 22; there are two second notches 222, which are arranged in a left-right alignment on the edge of the slot 22; and there are two positioning blocks 45, which are arranged in an alignment on the left and right sides of the connecting block 43.

[0061] Here, the first notch 221, the second notch 222, and the positioning block 45 are all set in pairs. In both the needle-hidden state and the needle-out state, the relative fixation between the sliding pusher 4 and the main support leg 2 can be guaranteed, and the fixing structure is very strong.

[0062] As can be seen from the above, the switching between the needle protrusion state and the needle concealment state of the fixed needle 5 can be achieved by pressing and pushing the pusher block 44. The switching is simple, and after the switching is completed, the position of the fixed needle 5 will not change under the premise of no external force.

[0063] Please see Figure 8 and Figure 9 In this embodiment, a fixing block 46 is provided below the sliding body 41, and the fixing pin 5 is fixed to the lower end of the fixing block 46.

[0064] Next, please refer to Figure 3 and Figure 4 In order to better push the push block 44, in this embodiment, the front end surface of the push block 44 is provided with anti-slip texture 411.

[0065] For more details, please see Figure 1 As can be seen, in this embodiment, the compass also includes a compass head 1, and the main support leg 2 and the rotating support leg 3 are rotatably mounted on the compass head 1. The upper end of the compass head 1 is provided with a hand-held part 6.

[0066] Furthermore, in this embodiment, the pen body is a first pen body 7, which is a mechanical pencil. The first pen body 7 is fixedly mounted on the rotating support leg 3 via a first mounting block 71. The structure of the mechanical pencil is prior art and will not be described in detail here.

[0067] Example 2: See Figures 7-11 Unlike Embodiment 1, in this embodiment, the pen body is a second pen body 8, and a second mounting block 81 is fixedly installed on the rotating support leg 3. The second pen body 8 is detachably installed below the second mounting block 81. Here, the pen refill can be replaced by removing the second pen body 8 from the second mounting block 81.

[0068] Example 3: See Figures 7-9 ,as well as Figure 12 , Figure 13 Unlike Embodiment 1 and Embodiment 2, in this embodiment, the pen body is a third pen body 9, which is a traditional pencil. A third mounting block 91 is fixedly installed on the rotating support leg 3. A socket 92 for the third pen body 9 to pass through is provided on one side of the third mounting block 91. An adjusting member 93 is provided on the socket 92. The position of the third pen body 9 can be fixed by rotating the knob located at one end of the adjusting member 93.

[0069] The compass with a sliding needle-receiving structure described above is only a preferred embodiment of this utility model and does not limit the patent scope of this utility model. All equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A slide-bead compass having a slide-bead structure, comprising a main leg and a rotating leg which are connected to each other in rotation, and a pen body mounted on the rotating leg, characterized in that, The extending direction of the main leg is set as a first direction, and the slide needle closing structure comprises: a slide inner cavity arranged inside the main leg and arranged along the first direction, one side of the slide inner cavity being provided with a slot extending along the first direction, and one end of the slide inner cavity being provided with a needle outlet; a slide push piece slidably arranged in the slide inner cavity, at least part of the slide push piece extending to outside of the main leg after passing through the slot, and one end of the slide push piece being fixedly provided with a fixed needle; the fixed needle having a needle-out state of being pushed out of the needle outlet along with the slide push piece and a needle-in state of being hidden in the slide inner cavity, and the slide push piece and the main leg both having a positioning structure for fixing relative positions of the slide push piece and the main leg in the needle-out state and the needle-in state.

2. The slide-and-pin tuck compass according to claim 1, wherein, The slide push piece comprises: a slide main body slidably arranged in the slide inner cavity; a pressing piece elastically connected to the slide main body, at least part of the pressing piece extending to outside of the main leg, and the positioning structure being arranged between the pressing piece and the slot.

3. The slide-and-pin tuck compass of claim 2, wherein, The pressing piece comprises: a spring pressing rod extending along the first direction, one end of the spring pressing rod being fixedly connected to the slide main body, and the other end of the spring pressing rod being provided with a connecting block passing through the slot; a push block fixed to the connecting block and arranged outside of the main leg.

4. The slide-and-pin tuck compass of claim 3, wherein, In the needle-in state, an upper end of the connecting block abuts against an upper end of an inner wall of the slot, and in the needle-out state, a lower end of the connecting block abuts against a lower end of the inner wall of the slot.

5. The slide-and-pin tuck compass of claim 4, wherein: A lower end of the slide main body is provided with a fixed block, and the fixed needle is fixed to a lower end of the fixed block.

6. The slide-and-pin tuck compass of claim 5, wherein: A front end surface of the push block is provided with anti-slip lines.

7. The slide needle structure of the compass according to claim 3, wherein, The positioning structure comprises a positioning block arranged on one side of the connecting block, and at least one first gap and at least one second gap arranged on a rim of the slot, the first gap being arranged above the second gap, the positioning block being clamped into the first gap in the needle-in state, and the positioning block being clamped into the second gap in the needle-out state.

8. The slide-and-pin tuck compass of claim 7, wherein, The first gap has two and is arranged on the rim of the slot in left-right alignment, the second gap has two and is arranged on the rim of the slot in left-right alignment, and the positioning block has two and is arranged on left and right sides of the connecting block in alignment.

9. The slide-and-pin tuck compass according to any one of claims 1 to 8, wherein, The compass further comprises a compass head, the main leg and the rotating leg being rotatably arranged on the compass head, and an upper end of the compass head being provided with a hand holding portion.

Images