A torsion spring concealed pipe cutter

Abstract

This utility model provides a torsion spring concealed pipe cutter, including a housing and a movable handle with one end hinged inside the housing via a hinge shaft. A torsion spring is installed at the hinge end of the movable handle, and the torsion spring is located inside the housing. The torsion spring includes a first torsion spring body sleeved on the hinge shaft. A first limiting groove for accommodating the first torsion spring body is provided on one outer wall of the hinge end of the movable handle. A limiting block protrudes from the inner wall of the housing. One leg of the first torsion spring body is placed in the first limiting groove, and the other leg abuts against the limiting block. The torsion spring concealed pipe cutter provided by this utility model overcomes the defect of existing pipe cutters where the torsion spring is exposed and easily falls off.

Description

Technical Field

[0001] This utility model relates to the field of pipe cutter technology, specifically to a torsion spring concealed pipe cutter. Background Technology

[0002] In the field of pipe processing and installation, pipe cutters are widely used tools for the precise cutting of various types of pipes. Among the many components of a pipe cutter, the torsion spring plays a crucial role, providing the elastic force for the moving handle to return to its original position, ensuring the flexibility and stability of the cutter during operation.

[0003] For example, CN223199072U discloses a quick-release pipe cutter with a blade; see its... Figure 2 A torsion spring is installed between the movable handle and the housing. Both the movable handle and the inner wall of the housing have U-shaped grooves, and the two legs of the torsion spring are installed in the corresponding U-shaped grooves. In this structure, the torsion spring is exposed externally. During transportation and use, the torsion spring is prone to displacement, and may even accidentally fall off, affecting its installation stability and firmness, and thus its service life. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of this, the present invention provides a torsion spring concealed pipe cutter, which overcomes the defect of the existing pipe cutter where the torsion spring is exposed and easily falls off.

[0006] (II) Technical Solution

[0007] To solve the aforementioned technical problem, this utility model provides a torsion spring concealed pipe cutter, including a housing and a movable handle with one end hinged inside the housing via a hinge shaft. A torsion spring is installed at the hinge end of the movable handle, and the torsion spring is located inside the housing. The torsion spring includes a first torsion spring body sleeved on the hinge shaft. A first limiting groove for accommodating the first torsion spring body is provided on one outer wall of the hinge end of the movable handle. A limiting block protrudes from the inner wall of the housing. One leg of the first torsion spring body is placed in the first limiting groove, and the other leg abuts against the limiting block.

[0008] In some embodiments, the first torsion spring body includes a helical torsion spring body and a first leg and a second leg extending toward both sides of the torsion spring body and arranged at an angle. The torsion spring body is sleeved on the hinge shaft. The torsion spring body and the first leg are placed in the first limiting groove, and the second leg abuts against the limiting block.

[0009] In some embodiments, the torsion spring further includes a second torsion spring body connected to the first torsion spring body, the first torsion spring body and the second torsion spring body being respectively disposed on both sides of the outer wall of the hinge end of the movable handle; a second limiting groove for accommodating the second torsion spring body is provided on the other side of the outer wall of the hinge end of the movable handle; one leg of the second torsion spring body is placed in the second limiting groove, and the other leg abuts against the limiting block.

[0010] In some embodiments, the first torsion spring and the second torsion spring have the same structure and are an integral structure.

[0011] In some embodiments, the housing includes a handle portion opposite to the movable handle, a connecting portion disposed at one end of the handle portion, and a tool holder portion connected to the connecting portion. The connecting portion has a mounting cavity, and the limiting block is disposed on the inner wall of the mounting cavity. One end of the movable handle and the torsion spring are both placed in the mounting cavity.

[0012] In some embodiments, a blade is detachably mounted on the hinge end of the movable handle, at least one limiting pin is mounted on the hinge end of the movable handle, and a limiting hole adapted to the limiting pin is provided on the blade.

[0013] In some embodiments, the housing includes a front housing and a rear housing fixed to each other, the front housing and the rear housing having similar shapes.

[0014] In some embodiments, the hinge shaft is a fastening pin, one end of which passes sequentially through the front housing, the movable handle, and the rear housing before engaging with a snap ring.

[0015] In some embodiments, one end of the movable handle is hinged to a U-shaped frame, and one end of the housing is provided with a hook groove; in the stored state, the U-shaped frame is hooked in the hook groove.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0018] 1) The torsion spring adopts a concealed design; placing the torsion spring inside the housing avoids the torsion spring being exposed, greatly reducing the risk of the torsion spring shifting or falling off due to external forces during transportation and use; the concealed design provides better protection for the torsion spring, ensuring that it can stably provide the return elastic force to the moving handle throughout the entire service life of the pipe cutter, effectively improving the stability and reliability of the pipe cutter.

[0019] 2) By setting a first limiting groove on the outer wall of the hinge end of the movable handle to accommodate the first torsion spring body, and by using the limiting block protruding from the inner wall of the housing to cooperate with the support foot of the first torsion spring body, the torsion spring is provided with precise limiting, which further enhances the firmness of the torsion spring installation, ensures that the torsion spring will not shift or loosen during the operation of the pipe cutter, and maintains the normal working state of the pipe cutter. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of a torsion spring concealed pipe cutter according to Embodiment 1;

[0022] Figure 2 This is a perspective view of another embodiment of a torsion spring concealed pipe cutter;

[0023] Figure 3 This is a perspective view of a torsion spring concealed pipe cutter after removing the front housing in Embodiment 1;

[0024] Figure 4 This is a perspective view of the casing after the torsion spring concealed pipe cutter removes the casing in Embodiment 1.

[0025] Figure 5 This is an exploded view of the torsion spring, blade, and movable handle of a torsion spring concealed pipe cutter according to Embodiment 1.

[0026] Figure 6 This is a schematic diagram of the structure of a torsion spring concealed pipe cutter housing according to Embodiment 1;

[0027] Figure 7 This is a perspective view of a torsion spring concealed pipe cutter housing according to Embodiment 1;

[0028] Figure 8 This is an exploded view of the housing of a torsion spring concealed pipe cutter according to Embodiment 1;

[0029] Figure 9 This is a perspective view of a torsion spring concealed pipe cutter after removing the front housing in Embodiment 2;

[0030] Figure 10 This is a perspective view of the casing after the torsion spring concealed pipe cutter removes the casing in Embodiment 2.

[0031] Figure 11 This is an exploded view of the torsion spring, blade, and movable handle of a torsion spring concealed pipe cutter according to Embodiment 2.

[0032] Figure 12 This is a perspective view of a torsion spring concealed in a pipe cutter according to Embodiment 2;

[0033] The component names corresponding to the various reference numerals in the figure are as follows: 1. Housing; 101. Limiting block; 102. Handle; 103. Connecting part; 104. Tool holder; 105. Mounting cavity; 106. Hook groove; 11. Front housing; 12. Rear housing; 2. Hinge shaft; 3. Movable handle; 301. First limiting groove; 302. Second limiting groove; 4. Torsion spring; 41. First torsion spring body; 411. Torsion spring body; 412. First support leg; 413. Second support leg; 42. Second torsion spring body; 5. Blade; 501. Limiting hole; 6. Limiting pin; 7. Snap ring; 8. U-shaped frame. Detailed Implementation

[0034] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0035] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0037] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0038] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0039] Example 1:

[0040] Combination Figures 1-8 As shown, this utility model provides a torsion spring concealed pipe cutter, including a housing 1 and a movable handle 3, one end of which is hinged inside the housing 1 via a hinge shaft 2. A torsion spring 4 is installed at the hinge end of the movable handle 3, and the torsion spring 4 is located inside the housing 1. The torsion spring 4 includes a first torsion spring body 41 sleeved on the hinge shaft 2. A first limiting groove 301 for accommodating the first torsion spring body 41 is provided on one side of the outer wall of the hinge end of the movable handle 3. A limiting block 101 protrudes from the inner wall of the housing 1. One leg of the first torsion spring body 41 is placed in the first limiting groove 301, and the other leg abuts against the limiting block 101.

[0041] This structure employs a concealed torsion spring, placing it inside the housing to prevent it from being exposed. This significantly reduces the risk of the torsion spring shifting or falling off due to external forces during transportation and use. The concealed design provides better protection for the torsion spring, ensuring it provides stable return elasticity to the movable handle throughout the entire service life of the pipe cutter, effectively improving the stability and reliability of the pipe cutter. By providing a first limiting groove on the outer wall of the hinge end of the movable handle to accommodate the first torsion spring body, which is fitted onto the hinge shaft, and then using a limiting block protruding from the inner wall of the housing to cooperate with the support foot of the first torsion spring body, precise limiting is provided for the torsion spring, further enhancing the firmness of the torsion spring installation and ensuring that the torsion spring will not shift or loosen during pipe cutter operation, maintaining the normal working condition of the pipe cutter.

[0042] See Figures 3 to 5The first torsion spring body 41 includes a helical torsion spring body 411 and a first leg 412 and a second leg 413 extending towards both sides of the torsion spring body 411 and arranged at an angle. The torsion spring body 411 is sleeved on the hinge shaft 2. The torsion spring body 411 and the first leg 412 are both placed within the first limiting groove 301, and the second leg 413 abuts against the limiting block 101. In this structure, the first torsion spring body adopts a helical torsion spring body combined with the angled first and second legs, which allows the torsion spring to better adapt to the installation position and force direction while providing elastic force, ensuring the smoothness and stability of the movable handle's reset. The torsion spring body sleeved on the hinge shaft works in conjunction with the first limiting groove and the limiting block to effectively improve the stability and reliability of the torsion spring installation. The torsion spring body 411, the first leg 412, and the second leg 413 are designed as an integral structure.

[0043] See Figures 6 to 8 The housing 1 includes a handle portion 102 opposite to the movable handle 3, a connecting portion 103 disposed at one end of the handle portion 102, and a tool holder portion 104 connected to the connecting portion 103. A mounting cavity 105 is provided within the connecting portion 103, and a limiting block 101 is disposed on the inner wall of the mounting cavity 105. One end of the movable handle 3 and the torsion spring 4 are both placed within the mounting cavity 105. In this structure, the mounting cavity 105 provides good protection for the torsion spring, reducing interference from external factors on the torsion spring and the movable handle.

[0044] See Figures 6 to 8 The hinge end of the movable handle 3 is detachably fitted with a blade 5, which corresponds to the tool holder 104. At least one limiting pin 6 is installed on the hinge end of the movable handle 3, and the blade 5 has a limiting hole 501 that matches the limiting pin 6. The detachable blade 5 allows for easy removal; the connection using the limiting pin 6 and the limiting hole 501 facilitates assembly and disassembly; two limiting pins 6 are located on either side of the hinge shaft 2. This structure, employing a concealed torsion spring design and featuring a detachable blade, is convenient to use.

[0045] See Figure 1 , Figure 2 and Figure 8 The housing 1 includes a front housing 11 and a rear housing 12 that are fixed to each other. The front housing 11 and the rear housing 12 have similar shapes, and the movable handle 3 is located between the front housing 11 and the rear housing 12. The hinge shaft 2 is a fastening pin, one end of which passes through the front housing 11, the movable handle 3, and the rear housing 12 in sequence and then engages with the retaining spring 7. This structure uses a fastening pin and retaining spring for connection, and the movable handle 3 is easy to install and remove, facilitating subsequent tool changing operations.

[0046] See Figure 1 , Figure 2 and Figure 8The movable handle 3 is hinged to a U-shaped frame 8 at the end away from the blade, and a hook groove 106 is provided at one end of the housing 1. When the pipe cutter is in the retracted state, the U-shaped frame 8 is hooked in the hook groove 106, which can restrict the opening of the movable handle 3 and the blade.

[0047] Example 2:

[0048] The difference between the torsion spring concealed pipe cutter provided in this embodiment and Embodiment 1 is that the structure of the torsion spring 4 is different.

[0049] See Figures 9 to 12 The torsion spring 4 also includes a second torsion spring body 42 connected to the first torsion spring body 41. The first torsion spring body 41 and the second torsion spring body 42 are respectively located on both sides of the outer wall of the hinge end of the movable handle 3. A second limiting groove 302 for accommodating the second torsion spring body 42 is provided on the other side of the outer wall of the hinge end of the movable handle 3. One leg of the second torsion spring body 42 is placed in the second limiting groove 302, and the other leg abuts against the limiting block 101. The first torsion spring body 41 and the second torsion spring body 42 have the same structure and are an integral structure.

[0050] In this embodiment, two torsion springs are used, which have stronger elasticity and better performance. In addition, the two torsion springs can be clamped at the hinge end of the movable handle 3. When the movable handle 3 is disassembled for blade replacement, the torsion springs will not fall off, preventing them from being lost and making them more convenient to use.

[0051] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0052] The above description is merely a specific embodiment of this application, but the scope of protection of this application 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 application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A torsion spring hidden pipe cutter, comprising a housing (1) and a movable handle (3) hinged inside the housing (1) by a hinge shaft (2), characterized in that: The hinge end of the movable handle (3) is equipped with a torsion spring (4), which is placed inside the housing (1). The torsion spring (4) includes a first torsion spring body (41) sleeved on the hinge shaft (2). A first limiting groove (301) for accommodating the first torsion spring body (41) is provided on one side of the outer wall of the hinge end of the movable handle (3). A limiting block (101) protrudes from the inner wall of the housing (1). One leg of the first torsion spring body (41) is placed in the first limiting groove (301), and the other leg abuts against the limiting block (101).

2. The torsion spring concealed pipe cutter according to claim 1, characterized in that: The first torsion spring body (41) includes a helical torsion spring body (411) and a first leg (412) and a second leg (413) extending toward both sides of the torsion spring body (411) and arranged at an angle. The torsion spring body (411) is sleeved on the hinge shaft (2). The torsion spring body (411) and the first leg (412) are placed in the first limiting groove (301). The second leg (413) abuts against the limiting block (101).

3. The torsion spring concealed pipe cutter according to claim 1, characterized in that: The torsion spring (4) further includes a second torsion spring body (42) connected to the first torsion spring body (41). The first torsion spring body (41) and the second torsion spring body (42) are respectively placed on both sides of the outer wall of the hinge end of the movable handle (3). A second limiting groove (302) for accommodating the second torsion spring body (42) is provided on the other side of the outer wall of the hinge end of the movable handle (3). One leg of the second torsion spring body (42) is placed in the second limiting groove (302), and the other leg abuts against the limiting block (101).

4. The torsion spring concealed pipe cutter according to claim 3, characterized in that: The first torsion spring (41) and the second torsion spring (42) have the same structure and are an integral structure.

5. The torsion spring concealed pipe cutter according to claim 1, characterized in that: The housing (1) includes a handle portion (102) opposite to the movable handle (3), a connecting portion (103) disposed at one end of the handle portion (102), and a tool holder portion (104) connected to the connecting portion (103). The connecting portion (103) is provided with a mounting cavity (105). The limiting block (101) is disposed on the inner wall of the mounting cavity (105). One end of the movable handle (3) and the torsion spring (4) are both placed in the mounting cavity (105).

6. The torsion spring concealed pipe cutter according to claim 1, characterized in that: The hinge end of the movable handle (3) is detachably equipped with a blade (5), and at least one limiting pin (6) is installed on the hinge end of the movable handle (3). The blade (5) is provided with a limiting hole (501) that is adapted to the limiting pin (6).

7. The torsion spring concealed pipe cutter according to claim 1, characterized in that: The housing (1) includes a front housing (11) and a rear housing (12) fixed to each other, and the front housing (11) and the rear housing (12) have similar shapes.

8. The torsion spring concealed pipe cutter according to claim 7, characterized in that: The hinge shaft (2) is a fastening pin. One end of the fastening pin passes through the front housing (11), the movable handle (3) and the rear housing (12) in sequence and then engages with the snap ring (7).

9. The torsion spring concealed pipe cutter according to claim 1, characterized in that: One end of the movable handle (3) is hinged to a U-shaped frame (8), and one end of the housing (1) is provided with a hook groove (106); in the stored state, the U-shaped frame (8) is hooked in the hook groove (106).

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