A pipe cutter with a hidden torsion spring

Abstract

The utility model provides a kind of torsion spring hidden pipe cutter, including shell and one end hinged in the movable handle of the shell interior, the hinged end of the movable handle is installed with torsion spring between the shell, the torsion spring is placed in the shell;The inner wall of the shell is positioned on the position close to the hinged end of the movable handle or the hinged end outer wall of the movable handle and is equipped with limit post, the torsion spring is sleeved on the limit post, and one end of the torsion spring is supported on the shell, and its other end is supported on the movable handle;A kind of torsion spring hidden pipe cutter provided by the utility model overcomes the defect that existing pipe cutter torsion spring is exposed and leads to easy to fall 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 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.

[0005] (II) Technical Solution 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. A torsion spring is installed between the hinged end of the movable handle and the housing, and the torsion spring is placed inside the housing. A limiting post is provided on the inner wall of the housing near the hinged end of the movable handle or on the outer wall of the hinged end of the movable handle. The torsion spring is fitted onto the limiting post, and one end of the torsion spring abuts against the housing, while the other end abuts against the movable handle.

[0006] In some embodiments, the limiting post is integrally disposed at the hinge end of the movable handle, and a limiting groove is formed inward on one side of the outer wall of the hinge end of the movable handle, with the limiting post disposed at the bottom of the limiting groove.

[0007] In some embodiments, the limiting post is disposed on the inner wall of the housing, the limiting post includes protrusions symmetrically disposed on the inner wall of the housing, and the torsion spring passes through the limiting post.

[0008] 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, and two protrusions respectively disposed on the inner walls of the front housing and the rear housing.

[0009] In some embodiments, the protrusion is a stepped structure, which includes a boss and a through shaft, and the torsion spring passes through the through shaft and is limited between the two bosses.

[0010] In some embodiments, the torsion spring includes a helical portion and a first leg and a second leg extending toward both sides of the helical portion and arranged at an angle. The helical portion is fitted onto the limiting post, the first leg abuts against the inner wall of the housing, and the second leg abuts against the inner wall of the movable handle.

[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, wherein the movable handle is hinged within the connecting portion, and the torsion spring is located within the connecting portion.

[0012] In some embodiments, the movable handle is hinged to the housing via a hinge shaft, which is a fastening pin. One end of the fastening pin passes sequentially through the front housing, the movable handle, and the rear housing before engaging with a retaining ring.

[0013] 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.

[0014] 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.

[0015] (III) Beneficial Effects 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: 1) The torsion spring adopts a concealed design, placing the torsion spring inside the housing, effectively avoiding the disadvantages of the torsion spring being exposed; during transportation and use, it greatly reduces the risk of the torsion spring being displaced or accidentally falling off due to external forces, significantly improves the stability and firmness of the torsion spring installation, and extends the service life of the pipe cutter.

[0016] 2) By setting a limiting post on the inner wall of the housing near the hinge end of the movable handle or on the outer wall of the hinge end of the movable handle, and fitting a torsion spring onto the limiting post, the torsion spring can be stably limited, ensuring that it can stably provide a return elastic force to the movable handle, thus guaranteeing the flexibility and stability of the pipe cutter operation. The limiting post can be integrally set at the bottom of the limiting groove at the hinge end of the movable handle, or it can be symmetrically set as protrusions on the inner wall of the housing. This diverse setting method can meet different design requirements and manufacturing processes, improving the adaptability of the product. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a perspective view of a torsion spring concealed pipe cutter according to Embodiment 1; Figure 2 This is a perspective view of the connection between the torsion spring and the limiting post in a torsion spring concealed pipe cutter according to Embodiment 1; Figure 3 This is an exploded view of a torsion spring concealed pipe cutter according to Embodiment 1; Figure 4 This is a perspective view of the connection between the torsion spring and the housing in a torsion spring concealed pipe cutter according to Embodiment 1; Figure 5 This is a perspective view of the connection between the torsion spring and the limiting post in a torsion spring concealed pipe cutter according to Embodiment 2; Figure 6 This is an exploded view of the movable handle, torsion spring, and blade in a torsion spring concealed pipe cutter according to Embodiment 2; The component names corresponding to the various reference numerals in the figure are as follows: 1. Housing; 101. Handle; 102. Connecting part; 103. Tool holder; 104. Hook groove; 11. Front housing; 12. Rear housing; 2. Movable handle; 201. Limiting groove; 3. Torsion spring; 301. Helical part; 302. First support leg; 303. Second support leg; 4. Limiting post; 401. Protruding post; 402. Boss; 403. Through shaft; 5. Hinge shaft; 6. Snap ring; 7. Blade; 701. Limiting hole; 8. Limiting pin; 9. U-shaped frame. Detailed Implementation

[0019] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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. Example

[0024] Combination Figures 1-4 As shown, this utility model provides a torsion spring concealed pipe cutter, including a housing 1 and a movable handle 2 with one end hinged inside the housing 1. A torsion spring 3 is installed between the hinged end of the movable handle 2 and the housing 1, and the torsion spring 3 is placed inside the housing 1.

[0025] See Figure 2 and Figure 3The inner wall of the housing 1 has a limit post 4 protruding near the hinge end of the movable handle 2. The torsion spring 3 is fitted on the limit post 4, with one end of the torsion spring 3 abutting against the housing 1 and the other end of the torsion spring 3 abutting against the movable handle 2.

[0026] This structure places the torsion spring inside the housing, effectively avoiding the drawbacks of an exposed torsion spring. During transportation and use, it significantly reduces the risk of displacement or accidental detachment of the torsion spring due to external forces, greatly improving the stability and firmness of the torsion spring installation and extending the service life of the pipe cutter. By setting a limiting post on the inner wall of the housing near the hinge end of the movable handle, and fitting the torsion spring onto the limiting post, the torsion spring can be stably limited, ensuring it can reliably provide the return elastic force to the movable handle, guaranteeing the flexibility and stability of the pipe cutter operation.

[0027] See Figures 2 to 4 The limiting post 4 is located on the inner wall of the housing 1. The limiting post 4 includes symmetrically arranged protrusions 401 on the inner wall of the housing 1. The two protrusions 401 are positioned opposite each other and abut against each other. The torsion spring 3 passes through the limiting post 4. In this structure, the torsion spring 3 is limited on the limiting post 4. When the movable handle 2 is disassembled for tool replacement, the torsion spring 3 will not fall off, avoiding the risk of loss and providing good performance. The installation of the torsion spring 3 is also relatively simple when installing the movable handle 2.

[0028] See Figures 2 to 4 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. Two protrusions 401 are respectively provided on the inner walls of the front housing 11 and the rear housing 12, that is, one protrusion 401 is provided on the inner wall of the front housing 11 and the other protrusion 401 is provided on the inner wall of the rear housing 12. In this structure, the housing 1 adopts a split structure. The front housing 11 and the rear housing 12 can be fixed to each other by multiple screws, which facilitates the arrangement of the two protrusions 401 and also facilitates the installation of the torsion spring 3 on the limiting post 4.

[0029] See Figures 2 to 4 The two protruding pillars 401 have identical structures and are both stepped structures. Each protruding pillar 401 includes a boss 402 and a through shaft 403, which are integrally formed. The torsion spring 3 passes through the through shaft 403 and is positioned between the two bosses 402. In this structure, the stepped structure of the protruding pillars 401 allows the smaller diameter of the through shaft 403 to facilitate the insertion of the torsion spring 3, while the larger size of the bosses 402 can limit the position of the torsion spring 3, ensuring that the position of the torsion spring 3 corresponds to that of the movable handle 2, providing stable elastic force and resulting in better performance.

[0030] See Figure 2 and Figure 3The torsion spring 3 includes a helical part 301 and a first leg 302 and a second leg 303 extending toward both sides of the helical part 301 and arranged at an angle. The helical part 301, the first leg 302 and the second leg 303 are an integral structure. The helical part 301 is fitted on the limiting post 4, the first leg 302 abuts against the inner wall of the housing 1, and the second leg 303 abuts against the inner wall of the movable handle 2.

[0031] See Figure 1 The housing 1 includes a handle portion 101 opposite to the movable handle 2, a connecting portion 102 provided at one end of the handle portion 101, and a tool holder portion 103 connected to the connecting portion 102. The movable handle 2 is hinged in the connecting portion 102, and the torsion spring 3 is located in the connecting portion 102.

[0032] See Figure 3 The movable handle 2 is hinged to the housing 1 via a hinge shaft 5, which is a fastening pin. One end of the fastening pin passes through the front housing 11, the movable handle 2, and the rear housing 12 in sequence before engaging with the retaining spring 6. This structure allows the movable handle 2 to be detachably connected to the housing 1 through the cooperation of the fastening pin and the retaining spring 6. The movable handle 2 is easy to assemble and disassemble, thus facilitating the replacement of the blade.

[0033] See Figure 2 and Figure 3 The hinge end of the movable handle 2 is detachably fitted with a blade 7, and at least one limiting pin 8 is installed on the hinge end of the movable handle 2. The blade 7 is provided with a limiting hole 701 that matches the limiting pin 8. In this embodiment, there are two limiting pins 8, respectively arranged on both sides of the hinge shaft 5, so that the blade 7 is firmly connected to the hinge end of the movable handle 2. This structure uses a detachable blade 7, and the limiting pin 8 matches the limiting hole 701 on the blade 7, which facilitates timely replacement when the blade wears, ensuring that the cutter always maintains good cutting performance.

[0034] See Figure 1 One end of the movable handle 2 is hinged to a U-shaped frame 9, and one end of the housing 1 is provided with a hook groove 104; in the storage state, the U-shaped frame 9 is hooked in the hook groove 104. This structure, in the storage state, with the U-shaped frame hooked in the hook groove, saves storage space, prevents the pipe cutter from being damaged due to component shaking during storage, and improves the portability and storage safety of the pipe cutter. Example

[0035] See Figure 5 and Figure 6 The difference between this embodiment and embodiment one is that the position of the limiting post 4 is different. In this embodiment, the limiting post 4 is provided on the outer wall of the hinge end of the movable handle 2.

[0036] See Figure 5 and Figure 6 The limiting post 4 is integrally set at the hinge end of the movable handle 2. A limiting groove 201 is formed by recessing on one side of the outer wall of the hinge end of the movable handle 2, and the limiting post 4 is set at the bottom of the limiting groove 201. In this structure, the limiting groove 201 can accommodate the torsion spring 3, thereby allowing the position of the torsion spring 3 to be adjusted so that the two legs of the torsion spring 3 correspond to the middle positions of the movable handle and the inner wall of the housing, which can provide stable elastic force and has a better performance.

[0037] 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.

[0038] 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 concealed pipe cutter, comprising a housing (1) and a movable handle (2) hinged at one end inside the housing (1), characterized in that: A torsion spring (3) is installed between the hinge end of the movable handle (2) and the housing (1), and the torsion spring (3) is placed inside the housing (1); a limit post (4) is provided on the inner wall of the housing (1) near the hinge end of the movable handle (2) or on the outer wall of the hinge end of the movable handle (2), and the torsion spring (3) is fitted on the limit post (4), with one end of the torsion spring (3) abutting against the housing (1) and the other end abutting against the movable handle (2).

2. The torsion spring concealed pipe cutter according to claim 1, characterized in that: The limiting post (4) is integrally disposed at the hinge end of the movable handle (2). A limiting groove (201) is formed on the outer wall of one side of the hinge end of the movable handle (2). The limiting post (4) is disposed at the bottom of the limiting groove (201).

3. The torsion spring concealed pipe cutter according to claim 1, characterized in that: The limiting post (4) is disposed on the inner wall of the housing (1). The limiting post (4) includes protruding posts (401) symmetrically disposed on the inner wall of the housing (1). The torsion spring (3) passes through the limiting post (4).

4. The torsion spring concealed pipe cutter according to claim 3, characterized in that: The housing (1) includes a front housing (11) and a rear housing (12) fixed to each other. The front housing (11) and the rear housing (12) have similar shapes, and two protrusions (401) are respectively disposed on the inner walls of the front housing (11) and the rear housing (12).

5. The torsion spring concealed pipe cutter according to claim 3, characterized in that: The protruding post (401) has a stepped structure, which includes a boss (402) and a through shaft (403). The torsion spring (3) passes through the through shaft (403) and is limited between the two bosses (402).

6. The torsion spring concealed pipe cutter according to claim 1, characterized in that: The torsion spring (3) includes a helical part (301) and a first leg (302) and a second leg (303) extending toward both sides of the helical part (301) and arranged at an angle. The helical part (301) is fitted onto the limiting post (4). The first leg (302) abuts against the inner wall of the housing (1), and the second leg (303) abuts against the inner wall of the movable handle (2).

7. The torsion spring concealed pipe cutter according to claim 1, characterized in that: The housing (1) includes a handle portion (101) opposite to the movable handle (2), a connecting portion (102) disposed at one end of the handle portion (101), and a tool holder portion (103) connected to the connecting portion (102). The movable handle (2) is hinged in the connecting portion (102), and the torsion spring (3) is located in the connecting portion (102).

8. The torsion spring concealed pipe cutter according to claim 4, characterized in that: The movable handle (2) is hinged to the housing (1) via a hinge shaft (5). The hinge shaft (5) is a fastening pin. One end of the fastening pin passes through the front housing (11), the movable handle (2), and the rear housing (12) in sequence and then engages with the retaining ring (6).

9. The torsion spring concealed pipe cutter according to claim 1, characterized in that: The hinge end of the movable handle (2) is detachably equipped with a blade (7), and at least one limiting pin (8) is installed on the hinge end of the movable handle (2). The blade (7) is provided with a limiting hole (701) that is adapted to the limiting pin (8).

10. The torsion spring concealed pipe cutter according to claim 1, characterized in that: One end of the movable handle (2) is hinged to a U-shaped frame (9), and one end of the housing (1) is provided with a hook groove (104); in the storage state, the U-shaped frame (9) is hooked in the hook groove (104).

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