Dart hand needle changer and dart needle changer device
By using elastic washers and bolt connections in the dart needle changer, the problems of dart needle wear and cumbersome operation are solved, achieving stable dart needle fixation and convenient replacement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU RENLONG HARDWARE PROD CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-09
AI Technical Summary
Existing dart needle changers cause significant friction between the clamping plate and the limiting block and the dart needle when fixing the dart needle, resulting in severe wear, especially for rigid dart needles, and the operation is cumbersome.
An elastic gasket is embedded in the clamping area to form a positioning groove to accommodate the dart needle, and the dart needle clamping part is detachably fastened in the clamping area and connected with bolts to reduce friction and improve clamping stability.
It effectively reduces the probability of wear on the dart needle clamping parts, clamping area, and dart needle, improves clamping stability during needle replacement, and reduces maintenance costs.
Smart Images
Figure CN224334381U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of dart needle changing technology, and in particular to a manual dart needle changing machine and a dart needle changing device. Background Technology
[0002] Over time, darts often experience head damage. Initially, replacements were typically handled by professionals, who usually manually twisted the needle, a cumbersome and laborious process.
[0003] Therefore, dedicated dart needle changing devices have appeared on the market, such as the dart needle changer in Chinese patent document CN112621658A and the portable dart needle changer disclosed in Chinese patent document CN 217317855 U, which effectively lower the technical threshold and enable non-professionals to complete the dart needle changing operation independently.
[0004] However, traditional dart needle changers primarily use a clamping plate and a limiting block to fix the dart needle in place. For details, please refer to Chinese patent document CN112621658A. Figure 2 and Figure 3 Since dart needles are generally made of hard materials such as metal, the friction between the dart needle and the locking plate / limiting block during needle replacement is relatively large. This causes wear and tear on the dart needle and the locking plate / limiting block, especially when the locking plate / limiting block is made of a rigid (metal material). Utility Model Content
[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a manual dart needle changer and dart needle changing device that can effectively reduce the probability of wear on the dart needle clamping parts, clamping areas and dart needles, especially suitable for rigid dart needle clamping parts and clamping areas; also improve the clamping stability of the dart needle during needle changing, and facilitate the operator to replace damaged dart needle clamping parts or elastic shims separately.
[0006] The purpose of this disclosure is achieved through the following technical solution:
[0007] A manual dart needle changer includes a fixed frame, a sliding seat, a screw, a handle, and a dart needle pressing component. The fixed frame has a clamping area and a sliding area arranged opposite to each other. The sliding seat is slidably disposed on the sliding area. One end of the sliding seat has a receiving cavity for receiving the dart body. The other end of the sliding seat is connected to the handle through the screw.
[0008] The manual dart needle changer also includes an elastic pad, which is embedded in the clamping area. The elastic pad has a positioning groove for receiving the dart needle, and the positioning groove is disposed opposite to the receiving cavity. The dart needle pressing component is detachably fastened in the clamping area, and the dart needle pressing component moves and abuts against the dart needle.
[0009] In one embodiment, the elastic pad has an elastic fitting protruding on the side facing the clamping area, the clamping area has an embedding groove on the side facing the elastic pad, the elastic fitting is engaged in the embedding groove, and the elastic pad has a positioning groove on the side facing away from the clamping area.
[0010] In one embodiment, the elastic fitting and the elastic gasket are integrally formed; and / or,
[0011] The projected area of the positioning groove on the elastic pad overlaps with the projected area of the elastic fitting on the elastic pad.
[0012] In one embodiment, the manual dart needle changer further includes a bolt, the dart needle presser has a through hole, the elastic washer has a mounting hole, the clamping area has a threaded hole, and the bolt passes through the through hole and the mounting hole in sequence and is screwed into the threaded hole.
[0013] In one embodiment, the number of bolts is two, and the two bolts are respectively located on both sides of the positioning groove.
[0014] In one embodiment, a limiting groove is formed on the side of the dart presser facing the elastic pad. When the dart presser is fastened to the clamping area, the limiting groove and the positioning groove together form a limiting cavity, which is used to limit and fix the dart.
[0015] In one embodiment, the side of the dart press-fit member facing away from the elastic pad is correspondingly formed with a limiting groove; and / or,
[0016] The limiting groove is a semi-circular arc groove, and the positioning groove is a semi-circular arc groove.
[0017] In one embodiment, the manual dart needle changer further includes a grip, which is disposed on one side of the clamping area and is detachably disposed from the fixing frame.
[0018] In one embodiment, the clamping area is a groove formed by the recess of the fixing member; the gripping member includes a first connector, a second connector and a third connector, the first end of the second connector is threadedly connected to the first end of the fixing member through the first connector; the second end of the second connector is threadedly connected to the second end of the fixing member through the third connector, and the second connector, the third connector and the first connector together form a gripping cavity.
[0019] A dart needle changing device includes the manual dart needle changing machine described in any of the above embodiments.
[0020] Compared with the prior art, this disclosure has at least the following advantages:
[0021] 1) Since the elastic pad is embedded in the clamping area, the elastic pad forms a positioning groove for receiving the dart needle. The positioning groove is arranged opposite to the receiving cavity. The dart needle pressing component is detachably fastened in the clamping area, and the dart needle pressing component moves against the dart needle to realize the limiting and fixing of the dart needle by the dart needle pressing component. The added elastic pad can better buffer the friction between the dart needle pressing component, the clamping area and the dart needle during the needle changing process, effectively reducing the probability of wear of the dart needle pressing component, the clamping area and the dart needle. It is especially suitable for dart needle pressing components and clamping areas with high rigidity (metal materials).
[0022] 2) In addition, since the elastic pad is embedded in the clamping area, the connection stability between the elastic pad and the clamping area of the fixing frame is improved. At the same time, in conjunction with the use of the dart needle clamping part being fastened in the clamping area, the clamping stability of the dart needle during the needle replacement process is effectively ensured, and the problem of dart needle slippage is avoided.
[0023] 3) Furthermore, since the dart needle clamping component is detachably fastened within the clamping area, the operator can replace the damaged dart needle clamping component or elastic gasket individually, thereby reducing maintenance costs. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the structure of a manual dart needle changer according to an embodiment of the present invention;
[0026] Figure 2 for Figure 1 The enlarged view shown at point A in the middle;
[0027] Figure 3 This is a schematic diagram of the structure of an elastic gasket in one direction according to an embodiment of the present invention;
[0028] Reference numerals: 10, Manual dart needle changer; 100, Fixing frame; 110, Clamping area; 111, Embedding groove; 112, Threaded hole; 120, Sliding area; 200, Sliding seat; 210, Receiving cavity; 300, Screw; 400, Handle; 500, Dart needle pressing part; 510, Through hole; 520, Limiting groove; 600, Elastic washer; 610, Positioning groove; 620, Elastic fitting part; 630, Mounting hole; 700, Bolt; 800, Grip; 810, First connecting part; 820, Second connecting part; 830, Third connecting part; 840, Grip cavity; 20, Dart body; 30, Dart needle. Detailed Implementation
[0029] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.
[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0032] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:
[0033] Please see Figures 1 to 3A dart manual needle changer 10 according to one embodiment includes a fixed frame 100, a sliding seat 200, a screw 300, a handle 400, and a dart needle pressing component 500. The fixed frame 100 has a clamping area 110 and a sliding area 120 arranged opposite to each other. The sliding area 120 is for the sliding seat 200 to slide. The sliding seat 200 is slidably disposed on the sliding area 120. One end of the sliding seat 200 has a receiving cavity 210 for receiving the dart body 20, so as to fix the dart body 20 on the sliding seat 200. The other end of the sliding seat 200 is connected to the handle 400 through the screw 300. When the operator rotates the handle 400, it can drive the screw 300 to rotate, thereby driving the sliding seat 200 to slide in the sliding area 120, so that the dart body 20 can move closer to or away from the clamping area 110, thereby completing the dart needle changing process.
[0034] It is understood that the manual dart needle changer 10 also includes an elastic pad 600, which is embedded in the clamping area 110. The elastic pad 600 forms a positioning groove 610 for receiving the dart needle 30. The positioning groove 610 is opposite to the receiving cavity 210 to achieve alignment between the dart needle 30 and the dart body 20, ensuring normal needle changing. The dart needle pressing component 500 is detachably fastened to the clamping area 110, and... Furthermore, the dart needle pressing component 500 movably abuts against the dart needle 30, thereby limiting and fixing the dart needle 30 with the dart needle pressing component 500. The added elastic pad 600 can effectively buffer the friction between the dart needle pressing component 500, the clamping area 110 and the dart needle 30 during the needle replacement process, effectively reducing the probability of wear on the dart needle pressing component 500, the clamping area 110 and the dart needle 30. It is especially suitable for dart needle pressing components 500 and clamping areas 110 with high rigidity (metal material).
[0035] In addition, since the elastic pad 600 is embedded in the clamping area 110, the connection stability between the elastic pad 600 and the clamping area 110 of the fixing frame 100 is improved. At the same time, in conjunction with the use of the dart needle pressing part 500 fastened in the clamping area 110, the clamping stability of the dart needle 30 during the needle replacement process is effectively ensured, and the problem of slippage of the dart needle 30 is avoided.
[0036] Furthermore, since the dart needle clamping component 500 is detachably fastened within the clamping area 110, the operator can individually replace the damaged dart needle clamping component 500 or the elastic washer 600, thereby reducing maintenance costs.
[0037] It should be noted that the specific structure of the sliding seat 200 slidingly disposed in the sliding area 120, the other end of the sliding seat 200 being connected to the handle 400 via the screw 300, and the receiving cavity 210 for receiving the dart body 20 are existing technologies, and therefore will not be described in detail in this disclosure.
[0038] like Figure 3 As shown, in one embodiment, the elastic pad 600 has an elastic fitting 620 protruding on the side facing the clamping area 110, and the clamping area 110 has an embedding groove 111 formed on the side facing the elastic pad 600. The elastic fitting 620 is engaged in the embedding groove 111 to achieve the engagement of the elastic pad 600 and the clamping area 110. The elastic pad 600 has a positioning groove 610 formed on the side facing away from the clamping area 110. The positioning groove 610 is adapted to the dart needle 30 to ensure that the dart needle 30 can be well engaged in the positioning groove 610 to achieve the positioning effect of the dart needle 30.
[0039] In one embodiment, the elastic fitting 620 and the elastic gasket 600 are integrally formed to better ensure the connection strength between the elastic gasket 600 and the elastic fitting 620, thereby improving their service life.
[0040] In one embodiment, the elastic gasket 600 is either a rubber gasket or a silicone gasket. Similarly, the elastic fitting 620 is either a rubber fitting or a silicone fitting. It is worth noting that the materials of the rubber gasket, silicone gasket, rubber fitting, and silicone fitting are known materials and can be obtained through existing technology; those skilled in the art can select them according to actual production needs. Therefore, they are not specifically described in this disclosure. Furthermore, this disclosure only addresses the connection relationship between the elastic gasket 600, the elastic fitting 620, and the pressing area and the dart needle pressing member 500.
[0041] like Figure 3 As shown, in one embodiment, the positioning groove 610 overlaps with the projected area of the elastic pad 600 and the projected area of the elastic fitting 620 on the elastic pad 600, so that the positioning groove 610 can be located directly above the elastic fitting 620. This ensures that the elastic fitting 620 below the positioning groove 610 can provide a more stable elastic support base for the dart 30. In this way, not only is the friction between the dart pressing member 500, the clamping area 110 and the dart 30 reduced more effectively, but the elastic fitting 620 below the positioning groove 610 is also ensured to have a thicker thickness, thereby improving the service life of the elastic pad 600 and effectively avoiding the problem that the traditionally used elastic pad 600 is easily damaged due to its thinness.
[0042] like Figure 1As shown, in one embodiment, the manual dart needle changer 10 further includes a bolt 700, the dart needle pressing component 500 has a through hole 510, the elastic washer 600 has a mounting hole 630, and the clamping area 110 has a threaded hole 112. The bolt 700 passes through the through hole 510 and the mounting hole 630 in sequence and is screwed into the threaded hole 112, so as to realize the threaded connection between the dart needle pressing component 500 and the clamping area 110 through the bolt 700, thereby realizing the detachable fastening connection between the dart needle pressing component 500 and the clamping area 110.
[0043] In one embodiment, two bolts 700 are used, enabling a more stable locking and fixation between the dart needle clamping component 500 and the clamping area 110. This effectively prevents the dart needle clamping component 500 from loosening due to external rotational forces during needle replacement, thus avoiding any impact on the needle replacement process. Furthermore, the two bolts 700 are located on both sides of the positioning groove 610, allowing them to be positioned on both sides of the dart needle 30, thereby achieving a more stable clamping and fixation of the dart needle 30.
[0044] It is understandable that although forming a single positioning groove 610 in the elastic gasket 600 can achieve good limiting and fixing of the dart needle 30, the depth of a single positioning groove 610 is relatively deep, which increases the thickness of the elastic gasket 600, resulting in a relatively high cost for the elastic gasket 600. Therefore, as Figure 1 As shown, in one embodiment, the dart needle pressing member 500 has a limiting groove 520 on the side facing the elastic pad 600. When the limiting groove 520 is used to fasten the dart needle pressing member 500 to the clamping area 110, the limiting groove 520 and the positioning groove 610 together form a limiting cavity. The limiting cavity is used to limit and fix the dart needle 30, which effectively avoids the problem that the cost of the elastic pad 600 is relatively high due to the relatively deep depth of the single positioning groove 610, and at the same time achieves better limiting and fixing of the dart needle 30.
[0045] like Figure 1 As shown, in one embodiment, the limiting groove 520 and the positioning groove 610 are semi-circular arc grooves to ensure that when the dart needle pressing part 500 is fastened in the clamping area 110, the two semi-circular arc grooves can form a complete circular limiting cavity, which is just compatible with the shape of the dart needle 30, thereby achieving better limiting and fixing of the dart needle 30.
[0046] like Figure 1As shown, in one embodiment, the side of the dart needle pressing component 500 facing away from the elastic pad 600 is provided with a limiting groove 520 to ensure that both sides of the dart needle 30 are provided with limiting grooves 520, which facilitates quick installation by the operator. That is, the operator does not need to distinguish the specific orientation of the dart needle pressing component 500 during the installation process.
[0047] In one embodiment, an elastic pad is provided in the limiting groove 520 so that the added elastic pad can better reduce the friction between the dart needle pressing part 500 and the dart needle 30, and further reduce the wear between the dart needle pressing part 500 and the dart needle 30.
[0048] like Figure 1 and Figure 2 As shown, in one embodiment, the manual dart needle changer 10 further includes a grip 800, which is disposed on one side of the clamping area 110. The added grip 800 makes it easier for the operator to grip, thereby ensuring that the operator can better exert the strength of both hands when changing needles, so as to quickly complete the needle changing operation. Furthermore, since the grip 800 is detachably disposed from the fixing frame 100, it is convenient for the operator to replace the damaged grip 800, thereby reducing maintenance costs.
[0049] like Figure 1 and Figure 2 As shown, in one embodiment, the clamping area 110 is a recess formed by the inner concavity of the fixing member, so that the clamping area 110 can be fastened with the dart needle pressing member 500; since the grip member 800 includes a first connector 810, a second connector 820 and a third connector 830, the first end of the second connector 820 is threadedly connected to the first end of the fixing member through the first connector 810, realizing the detachable setting of the first connector 810 and the fixing member; since the second end of the second connector 820 is threadedly connected to the second end of the fixing member through the third connector 830, realizing the detachable setting of the third connector 830 and the fixing member, and the second connector 820, the third connector 830 and the first connector 810 together form a grip cavity 840, which facilitates the operator's hand to enter the grip cavity 840 to ensure the stability of the operator's grip.
[0050] It should be noted that the specific structure of the first end of the second connector 820 being threadedly connected to the first end of the fixing member via the first connector 810, and the second end of the second connector 820 being threadedly connected to the second end of the fixing member via the third connector 830, belongs to the prior art. Therefore, it will not be described in detail in this disclosure.
[0051] This disclosure also provides a dart needle changing device, characterized in that it includes the manual dart needle changing machine 10 described in any of the above embodiments.
[0052] Compared with the prior art, this disclosure has at least the following advantages:
[0053] 1) Since the elastic pad 600 is embedded in the clamping area 110, the elastic pad 600 forms a positioning groove 610, which is used to receive the dart needle 30. The positioning groove 610 is arranged opposite to the receiving cavity 210. The dart needle pressing member 500 is detachably fastened in the clamping area 110, and the dart needle pressing member 500 and the dart needle 30 are in movable contact, so as to realize the limiting and fixing of the dart needle 30 by the dart needle pressing member 500. The added elastic pad 600 can better buffer the friction between the dart needle pressing member 500, the clamping area 110 and the dart needle 30 during the needle changing process, effectively reducing the probability of wear of the dart needle pressing member 500, the clamping area 110 and the dart needle 30. It is especially suitable for the rigid (metal material) dart needle pressing member 500 and clamping area 110.
[0054] 2) In addition, since the elastic pad 600 is embedded in the clamping area 110, the connection stability between the elastic pad 600 and the clamping area 110 of the fixing frame 100 is improved. At the same time, in conjunction with the use of the dart needle pressing part 500 fastened in the clamping area 110, the clamping stability of the dart needle 30 during the needle replacement process is effectively ensured, and the problem of slippage of the dart needle 30 is avoided.
[0055] 3) Furthermore, since the dart needle clamping component 500 is detachably fastened within the clamping area 110, the operator can replace the damaged dart needle clamping component 500 or the elastic pad 600 individually, thereby reducing maintenance costs.
[0056] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.
Claims
1. A manual dart needle changer, comprising a fixed frame, a sliding seat, a screw, a handle, and a dart needle pressing component, wherein the fixed frame has a clamping area and a sliding area arranged opposite to each other; the sliding seat is slidably disposed on the sliding area, one end of the sliding seat has a receiving cavity for receiving the dart body, and the other end of the sliding seat is connected to the handle via the screw; characterized in that, The manual dart needle changer also includes an elastic pad, which is embedded in the clamping area. The elastic pad has a positioning groove for receiving the dart needle, and the positioning groove is disposed opposite to the receiving cavity. The dart needle pressing component is detachably fastened in the clamping area, and the dart needle pressing component moves and abuts against the dart needle.
2. The manual needle changer for darts according to claim 1, characterized in that, The elastic pad has an elastic fitting protruding on the side facing the clamping area, the clamping area has an embedding groove on the side facing the elastic pad, the elastic fitting is engaged in the embedding groove, and the elastic pad has a positioning groove on the side facing away from the clamping area.
3. The manual needle changer for darts according to claim 2, characterized in that, The elastic fitting and the elastic gasket are integrally formed; and / or, The projected area of the positioning groove on the elastic pad overlaps with the projected area of the elastic fitting on the elastic pad.
4. The manual dart needle changer according to claim 1, characterized in that, The manual dart needle changer also includes a bolt, the dart needle pressing part has a through hole, the elastic washer has an mounting hole, the clamping area has a threaded hole, and the bolt passes through the through hole and the mounting hole in sequence and is screwed into the threaded hole.
5. The manual dart needle changer according to claim 4, characterized in that, The number of bolts is two, and the two bolts are located on both sides of the positioning groove.
6. The manual needle changer for darts according to claim 1, characterized in that, The side of the dart needle pressing component facing the elastic pad has a corresponding limiting groove. When the dart needle pressing component is fastened to the clamping area, the limiting groove and the positioning groove together form a limiting cavity, which is used to limit and fix the dart needle.
7. The manual needle changer for darts according to claim 6, characterized in that, The side of the dart-shaped pressing component facing away from the elastic pad is correspondingly provided with a limiting groove; and / or, The limiting groove is a semi-circular arc groove, and the positioning groove is a semi-circular arc groove.
8. The manual needle changer for darts according to claim 1, characterized in that, The manual dart needle changer also includes a grip, which is located on one side of the clamping area and is detachably mounted from the fixing frame.
9. The manual needle changer for darts according to claim 8, characterized in that, The clamping area is a groove formed by the recess of the fixing member; the gripping member includes a first connector, a second connector and a third connector, the first end of the second connector is threadedly connected to the first end of the fixing member through the first connector; the second end of the second connector is threadedly connected to the second end of the fixing member through the third connector, and the second connector, the third connector and the first connector together form a gripping cavity.
10. A dart needle changing device, characterized in that, The manual needle changer for darts includes any one of claims 1-9.