An open end wrench

Abstract

The present application relates to the technical field of wrench, especially to an open-end wrench, comprising a body part, which comprises a Z-shaped plate body, two ends of the plate body are respectively provided with two groups of openings, a groove is arranged in the opening with the largest caliber, a gasket part is installed on the body part, which comprises a plurality of gasket plates arranged in the openings, the gasket plates are inserted into the groove through the back plug. The gasket part solves the problems of single size and wear of the traditional wrench by being detachable and replaceable, expands the adaptability of the wrench to various specifications of screwing objects, and uses adjusting components including hooks, steel belts and screwing pieces, and a built-in sound alarm feedback mechanism to monitor the fastening state of the gasket plate in real time, effectively preventing safety hazards in the operation process. In addition, the wrench is also provided with a containing groove for storing spare gasket parts, and the gasket parts are locked by screwing pieces to prevent loss, which comprehensively improves the multifunctionality of the wrench.

Description

Technical Field

[0001] This invention relates to the field of wrench technology, and more particularly to an open-end wrench. Background Technology

[0002] In the field of traditional tools, open-end wrenches generally have certain limitations in design. Most traditional open-end wrenches only have a single opening size, which limits their versatility for various sizes of nuts or bolts. When faced with fasteners of different sizes, multiple wrenches of different sizes are often needed to meet the work requirements. Furthermore, during long-term and frequent use, the wrench opening is prone to wear due to friction and impact, causing the opening, which was originally tightly fitted with the nut or bolt, to loosen. This reduces the engagement force between the wrench and the fastener, affecting not only the stability of wrench operation but also compromising safety during use.

[0003] Furthermore, in certain specialized industries or environments, such as when handling flammable or explosive materials like oxygen cylinders, the use of traditional iron or steel wrenches poses safety hazards. Sparks generated by metal-to-metal contact could ignite a fire or explosion, undoubtedly a significant threat to the personal safety of on-site personnel. Therefore, it is necessary to develop a new wrench design that overcomes the problems of traditional open-end wrenches mentioned above, achieving adjustable size, wear resistance, and, in specific situations, the use of non-magnetic, non-sparking materials, thereby improving the tool's adaptability, lifespan, and safety. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned open-end wrenches, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide an open-end wrench, which addresses the problems of traditional open-end wrenches, such as fixed size, easy wear of the opening, and safety hazards in specific environments (such as oxygen cylinder operations), and urgently requires innovative design to improve its versatility, durability, and safety.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including,

[0007] The main body component includes a Z-shaped plate with two sets of openings at each end. The opening with the largest diameter has a groove inside.

[0008] A gasket assembly, mounted on the body assembly, includes a plurality of gaskets disposed in the opening, the gaskets being inserted into the groove via inserts on the back.

[0009] An adjusting component is disposed within the main body component, comprising a hook lock that slides along the groove body for locking the insert block. Multiple hook locks are connected in series via a steel strip, one end of which is provided with a screw fastener. The screw fastener is disposed in a cavity inside the plate body, and a reminder is provided at the air outlet of the cavity.

[0010] As a preferred embodiment of the open-end wrench of the present invention, each group of open ends includes two openings, one large and one small, which are arranged opposite to each other, wherein the opening with the largest diameter is the first opening.

[0011] In a preferred embodiment of the open-end wrench of the present invention, the groove body includes a insertion hole opened along the inner wall of the first opening and a first strip groove and a second strip groove arranged in parallel. The cross-sections of the first strip groove, the second strip groove and the insertion hole are all rectangular. The insertion block passes through the insertion hole and is located in the first strip groove.

[0012] In a preferred embodiment of the open-end wrench of the present invention, the hook lock slides within the second strip groove and corresponds one-to-one with the insert block. The insert block has a through hole, and the hook lock is hooked in the through hole. The cross-sectional area of ​​the hook lock is adapted to the cross-sectional area of ​​the through hole.

[0013] In a preferred embodiment of the open-end wrench of the present invention, a plurality of hooks are located on both sides of the first opening, and two adjacent hooks on the same side are connected in series, and the hooks on both sides are symmetrically arranged and intersect.

[0014] In a preferred embodiment of the open-end wrench of the present invention, one end of the steel strip is fixedly connected to the intersection point, and the steel strip is located in a guide groove opened inside the plate body. The guide groove is configured as a "7" shape, and its lateral direction is opposite to that of the first opening.

[0015] In a preferred embodiment of the open-end wrench of the present invention, a piston is slidably disposed inside the cavity, one end of the steel strip is fixedly connected to the piston, and a three-way valve is disposed at one end of the cavity, one end of the valve being connected to the cavity, and the other two ends being a one-way air inlet channel and a one-way air outlet channel, respectively, and a reminder element is disposed inside the one-way air outlet channel, preferably in the form of a whistle.

[0016] In a preferred embodiment of the open-end wrench of the present invention, the screwing member includes a screw located in the cavity and a nut for driving the screw to move, and one end of the screw is fixedly connected to the piston.

[0017] In a preferred embodiment of the open-end wrench of the present invention, the plate body is provided with a receiving groove for receiving a complete set of gasket components of various specifications, and a cover plate is provided above the receiving groove. The cover plate is inserted into a locking hole on the plate body by an extrusion piece with a cross-sectional area of ​​parallelogram.

[0018] In a preferred embodiment of the open-end wrench of the present invention, a locking ring is provided at one end of the cover plate near the cavity, and the screw is inserted into the locking ring.

[0019] The beneficial effects of this invention are as follows: The open-end wrench described in this application includes a main body and a detachable washer, wherein a detachable washer is disposed inside the first opening. By selecting washers of different specifications or materials, the first opening can be limited to fit threaded objects of different specifications or materials, thereby enabling operation on threaded objects of various specifications. This feature significantly expands the application range of the open-end wrench. Furthermore, considering the wear and tear that may occur during long-term use of the open-end wrench, the connection between the opening and the threaded object of the corresponding specification may become unstable, leading to the risk of slippage during operation and potentially causing injury to the operator. Traditional methods typically require replacing the entire open-end wrench, but this invention proposes a solution where only the worn part—the washer—needs to be replaced.

[0020] To lock the removable pad, this invention also includes an adjustment component consisting of a hook, a steel band, and a screw. While this structure effectively secures the pad initially, it may still wobble after prolonged use. To address this issue, a feedback mechanism is designed to issue an audible alarm when the pad becomes loose. When the pad wobbles, the screw is triggered to move in the opposite direction, causing the piston to move within the cavity. This activates an indicator located in the one-way air outlet channel, emitting a sound to alert the operator that the pad is loose and needs to be tightened.

[0021] An additional improvement includes a receiving slot on the plate to store complete sets of gasket components of various sizes. To prevent gasket loss, a cover plate was added above the receiving slot and internally locked by an extension of a screw, ensuring the cover plate remains closed and preventing accidental opening.

[0022] In summary, this invention provides an innovative open-end wrench design that not only improves its applicability and durability but also introduces an early warning system to enhance safety. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the open-end wrench of the present invention. Figure 1 .

[0025] Figure 2 This is a schematic diagram of the overall structure of the open-end wrench of the present invention. Figure 2 .

[0026] Figure 3 This is a cross-sectional structural diagram of the open-end wrench of the present invention.

[0027] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0028] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B.

[0029] In the picture:

[0030] 100. Body component; 101. Plate; 101a. Cavity; 101b. Guide groove; 101c. Receiving groove; 101d. Cover plate; 101e. Extrusion piece; 101f. Locking hole; 101g. Locking ring; 102. Opening; 102a. First opening; 103. Groove; 103a. Insertion hole; 103b. First strip groove; 103c. Second strip groove;

[0031] 200. Gasket assembly; 201. Gasket plate; 202. Insert block; 203. Through hole;

[0032] 300. Adjusting component; 301. Hook lock; 302. Steel strip; 303. Fastening component; 303a. Screw; 303b. Nut; 304. Reminder; 305. Piston; 306. Valve; 306a. One-way air intake passage; 306b. One-way air exhaust passage. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0036] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0037] Example 1

[0038] Reference Figures 1-3 This is the first embodiment of the present invention, which provides an open-end 102 wrench, including a body component 100, which includes a Z-shaped plate 101. The plate 101 has two sets of openings 102 at each end. The opening 102 with the largest diameter has a groove 103 inside. A gasket component 200 is installed on the body component 100 and includes multiple gaskets 201 disposed in the openings 102. The gaskets 201 are inserted into the groove 103 through inserts 202 on the back side. An adjusting component 300 is disposed in the body component 100 and includes a hook lock 301 that slides along the groove 103. The hook lock 301 is used to lock the inserts 202. Multiple hook locks 301 are connected in series by a steel strip 302. One end of the steel strip 302 is provided with a screw 303. The screw 303 is disposed in a cavity 101a inside the plate 101, and a reminder 304 is provided at the air outlet of the cavity 101a.

[0039] In this embodiment, by providing a removable pad 201 inside the first opening 102a102, different specifications, materials, and thicknesses of pads 201 can be selected according to the different screwed objects to limit the first opening 102a102 to conform to the specifications corresponding to the screwing. This allows for operation on screwed objects of different specifications or materials, expanding the range of operable objects. On the other hand, the opening 102 wrench will wear inside the opening 102 after long-term use, resulting in a less secure engagement with the corresponding screwed object, which can easily slip out when turned, and even cause injury. Traditionally, the entire opening 102 wrench can only be replaced, but now only this part of the pad 201 can be replaced.

[0040] Furthermore, an adjustment component 300 is provided inside the plate 101, which locks the disassembled pad 201 through a hook, steel band 302 and screw fastener 303. However, during long-term use, the pad 201 will wobble, which will cause the screw fastener 303 to move in the opposite direction. This will push the piston 305 installed on the screw fastener 303 in the cavity 101a, causing the reminder component 304 located in its one-way air outlet channel 306b to sound, reminding the operator that the pad 201 is loose and needs to be reinforced.

[0041] Furthermore, a receiving groove 101c for receiving various sizes of complete sets of gasket components 200 is provided on the plate 101. A cover plate 101d is provided on the receiving groove 101c to prevent it from falling off. The extension of the screw 303 will insert and lock the cover plate 101d from the inside to prevent it from opening.

[0042] Example 2

[0043] Reference Figures 2-5 This is the second embodiment of the present invention, which differs from the first embodiment in that: a Z-shaped plate 101 is provided at each end of the plate 101, and a groove 103 is formed inside the largest opening 102. Each set of openings 102 includes two openings 102, one large and one small, which are arranged opposite to each other. The largest opening 102 is the first opening 102a102. A gasket component 200 is installed on the body component 100 and includes multiple gaskets 201 disposed in the openings 102. The gaskets 201 are inserted into the grooves 103 through inserts 202 on the back side.

[0044] It should be noted that a "Z"-shaped plate body 101 structure is adopted. This design helps to enhance the ease of operation of the wrench in complex working conditions, especially when used in confined spaces, allowing for more flexible angle changes to adapt to different fastener positions. Two opposing openings 102, one large and one small, are provided at each end for operating on screws of different sizes or materials.

[0045] Among the multiple openings 102, the largest diameter is designated as the first opening 102a102, with a groove 103 inside. The pad 201 is inserted into the groove 103 on the inner wall of the first opening 102a102 via the insert block 202 on the back, thereby installing multiple pads 201 on the inner wall of the first opening 102a102. This allows for quick replacement of the appropriate pad 201 according to the different specifications or materials of fasteners encountered in actual work, enabling the first opening 102a102 of the wrench to match and stably grip nuts 303b or bolts of different sizes, thus greatly improving the practicality and adaptability of the wrench.

[0046] The groove 103 includes a insertion hole 103a opened along the inner wall of the first opening 102a102 and a first strip groove 103b and a second strip groove 103c arranged in parallel. The cross-sections of the first strip groove 103b, the second strip groove 103c and the insertion hole 103a are all rectangular. The insertion block 202 passes through the insertion hole 103a and is located in the first strip groove 103b. The hook lock 301 slides in the second strip groove 103c and corresponds one-to-one with the insertion block 202. The insertion block 202 is provided with a through hole. The hook lock 301 is hooked in the through hole. The cross-sectional area of ​​the hook lock 301 is adapted to the cross-sectional area of ​​the through hole.

[0047] Specifically, it should be noted that the groove 103 inside the first opening 102a102 of the wrench has a very precise structure. It features four rectangular cross-section insertion holes 103a along the inner wall of the first opening 102a102, and parallel to these are a first strip groove 103b and a second strip groove 103c. All three structures are designed with rectangular cross-sections to ensure precise positioning and a secure connection. The gasket component 200 includes four gasket plates 201 corresponding to the four faces of the first opening 102a102. Each gasket plate 201 has a rectangular block-shaped insertion block 202 embedded in its back. During installation, these insertion blocks 202 are tightly mated with the corresponding insertion holes 103a in the groove 103. Because the cross-sectional areas of the two are compatible, the insertion blocks 202 will not wobble circumferentially after being inserted into the insertion holes 103a, ensuring the stability of the gasket plate 201.

[0048] In addition, a hook lock 301 is designed to further lock the insert 202. The main body of the hook lock 301 can slide within the second strip groove 103c, while its hook portion is located within the first strip groove 103b. When the hook lock 301 is moved by force in the second strip groove 103c, its hook portion will accurately hook onto the rectangular cross-section through hole on the insert 202 on the forward path, thereby achieving mechanical locking of the insert 202 from inside the first opening 102a102, effectively preventing the insert 202 and the pad 201 from disengaging during use.

[0049] The specific installation process for the pad 201 is carried out in a certain order, starting from one end of the first opening 102a102, and proceeding one by one from the outside in and back to the other end to ensure that all the inserts 202 of the pad 201 are inserted into place. Finally, by pulling the two sets of hook locks 301 connected in series to move synchronously, the individual inserts 202 are locked simultaneously.

[0050] The remaining structure is the same as that in Example 1.

[0051] Example 3

[0052] Reference Figures 2-5 This is the third embodiment of the present invention. This embodiment differs from the second embodiment in that: multiple hook locks 301 are located on both sides of the first opening 102a102, and two adjacent hook locks 301 on the same side are connected in series. The hook locks 301 on both sides are symmetrically arranged and intersect. One end of the steel strip 302 is fixedly connected to the intersection point, and the steel strip 302 is located in a guide groove 101b opened inside the plate 101. The guide groove 101b is shaped like a "7", and its lateral direction is opposite to that of the first opening 102a102. A piston 305 is slidably arranged inside the cavity 101a. One end of the steel strip 302 is fixedly connected to the piston 305, and a three-way valve 306 is provided at one end of the cavity 101a. The screw fastener 303 includes a screw 303a located in the cavity 101a and a nut 303b for moving the screw 303a. One end of the screw 303a is fixedly connected to the piston 305.

[0053] It should be noted that the steel belt 302 is fixed at the intersection of two sets of hook locks 301 arranged symmetrically on the left and right. In this way, when the steel belt 302 moves, it can synchronously drive the two sets of hook locks 301 to move together, realizing the function of locking or unlocking together. The reason for choosing the steel belt 302 as the transmission medium is that it has sufficient strength and flexibility, which can not only ensure the effective traction of the hook locks 301 to complete the locking process, but also flexibly push the hook locks 301 to realize the unlocking action.

[0054] To ensure precise guidance of the movement of the steel strip 302, the designer placed it in a specific-shaped “7”-shaped guide groove 101b. The lateral portion of the guide groove 101b is opposite to the direction of the first opening 102a102 on the wrench. This layout effectively limits the steel strip 302 to linear reciprocating motion only along the central axis of the two sets of symmetrical hook locks 301, ensuring that the two sets of hook locks 301 can open and close completely synchronously and consistently.

[0055] Furthermore, one end of the steel band 302 is connected to a piston 305 that slides inside the cavity 101a, and the piston 305 itself is fixed to one end of the screw 303a. The piston 305 can only slide within the cavity 101a, so the screw 303a cannot rotate even when subjected to force. Thus, when an external operator rotates the nut 303b, the nut 303b drives the screw 303a to move forward or backward. This movement is transmitted to the steel band 302 via the piston 305, causing the steel band 302 to follow the screw 303a in a corresponding forward or backward motion. Ultimately, the movement of the steel band 302 will trigger all the hook locks 301, achieving the locking or unlocking operation of the target plug 202.

[0056] One end of the cavity 101a is provided with a three-way valve 306. One end of the valve 306 is connected to the cavity 101a, and the other two ends are a one-way air intake channel 306a and a one-way air outlet channel 306b, respectively. A reminder element 304 is provided inside the one-way air outlet channel 306b, which is preferably in the form of a whistle.

[0057] It should be further explained that a three-way valve system 306 is configured within the internal cavity 101a of the wrench. When the operator rotates the nut 303b to move the screw 303a, the piston 305 connected to the screw 303a also slides within the cavity 101a. During this process, air is drawn into the cavity 101a through the designed one-way air intake channel 306a.

[0058] To address the potential loosening of the pad 201 after prolonged use, this design incorporates a detection and warning mechanism. When the pad 201 shows signs of loosening due to vibration or other reasons, this will be indirectly reflected in the reverse movement of the tightening member 303. This reverse movement of the tightening member 303 will further push the piston 305 to actuate within the cavity 101a, releasing gas through the pre-set one-way venting channel 306b. The design includes a warning element 304, preferably in the form of a whistle. When gas is pushed out by the piston 305 and passes through the one-way venting channel 306b, the whistle will sound. Hearing the whistle indicates that the pad 201 may have loosened, and the operator should immediately stop work and retighten the nut 303b to reinforce the pad 201. This intelligent warning system greatly enhances the safety and maintenance efficiency of the wrench in practical applications.

[0059] The remaining structure is the same as that in Example 2.

[0060] Example 4

[0061] Reference Figure 2 and Figure 3 This is the fourth embodiment of the present invention, which differs from the third embodiment in that: a receiving groove 101c is provided on the plate 101 for receiving complete sets of gasket components 200 of various specifications. A cover plate 101d is provided above the receiving groove 101c, and the cover plate 101d is inserted into a locking hole 101f provided on the plate 101 through a parallelogram-shaped extrusion piece 101e. A locking ring 101g is provided on the cover plate 101d near the cavity 101a, and a screw 303a is inserted into the locking ring 101g.

[0062] It should be noted that in this device, the closing process of the cover plate 101d first involves inserting a parallelogram-shaped compression piece 101e from the cover plate 101d into the locking hole 101f for initial locking. However, since this locking method relies on the deformation and insertion of the parallelogram structure, its locking effect is not very stable and there is a risk of easy loosening. To solve this problem, this application adds a more reliable locking mechanism. When the operator rotates the nut 303b, it will drive the screw 303a to move within the cavity 101a, and move a part of the screw 303a into the receiving groove 101c inside the wrench body. After the screw 303a is transferred to this location, it will engage and lock the cover plate 101d located in the receiving groove 101c with the locking ring 101g, thereby achieving a complete and secure lock on the cover plate 101d.

[0063] Since the receiving groove 101c contains a complete set of gasket components 200 of various specifications, when it is necessary to open the receiving groove 101c to replace the gasket component 200, it indicates that the currently used gasket component 200 does indeed need to be replaced. In this case, by reversing the operation, that is, turning the nut 303b to return the screw 303a to its original position, the locking state of the gasket component 200 in the cover plate 101d and the receiving groove 101c can be released. At the same time, the screw 303a can drive the steel strip 302 to move in the opposite direction, pushing each hook lock 301 to unlock the insert block 202, thereby conveniently and quickly achieving the purpose of replacing the gasket component 200.

[0064] The remaining structure is the same as that in Example 3.

[0065] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0066] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An open-end wrench, characterized in that: include, The main body component (100) includes a Z-shaped plate (101) with two sets of openings (102) at each end. The largest opening (102) has a groove (103) inside. A gasket component (200) is mounted on the main body component (100) and includes multiple gaskets (201) disposed in the openings (102). The gaskets (201) are inserted into the grooves (103) via inserts (202) on their back sides. An adjusting component (30...) 0), disposed within the main body component (100), which includes a hook lock (301) that slides along the groove (103), the hook lock (301) being used to lock the insert (202), a plurality of hook locks (301) being connected in series by a steel strip (302), one end of the steel strip (302) being provided with a screw (303), the screw (303) being disposed in a cavity (101a) inside the plate (101), and the air outlet of the cavity (101a) being provided with a reminder (304).

2. The open-end wrench according to claim 1, characterized in that: Each set of openings (102) includes two openings, one large and one small, and the two openings are arranged opposite to each other, wherein the opening (102) with the largest diameter is the first opening (102a).

3. The open-end wrench according to claim 2, characterized in that: The groove (103) includes a plug hole (103a) opened along the inner wall of the first opening (102a) and a first strip groove (103b) and a second strip groove (103c) arranged in parallel. The cross-sections of the first strip groove (103b), the second strip groove (103c) and the plug hole (103a) are all set to rectangles. The plug block (202) passes through the plug hole (103a) and is located in the first strip groove (103b).

4. The open-end wrench according to claim 3, characterized in that: The hook lock (301) is located in the second strip groove (103c) and can slide, and corresponds one-to-one with the insert block (202). The insert block (202) has a through hole (203), and the hook lock (301) is hooked in the through hole (203). The cross-sectional area of ​​the hook lock (301) is adapted to the cross-sectional area of ​​the through hole (203).

5. The open-end wrench according to claim 3 or 4, characterized in that: Multiple hook locks (301) are located on both sides of the first opening (102a), and two adjacent hook locks (301) on the same side are connected in series. The hook locks (301) on both sides are symmetrically arranged and intersect.

6. The open-end wrench according to claim 5, characterized in that: One end of the steel strip (302) is fixedly connected to the intersection point, and the steel strip (302) is located in the guide groove (101b) opened inside the plate (101). The guide groove (101b) is set in the shape of "7" and its lateral direction is opposite to that of the first opening (102a).

7. The open-end wrench according to claim 6, characterized in that: A piston (305) is slidably disposed inside the cavity (101a). One end of the steel strip (302) is fixedly connected to the piston (305). A three-way valve (306) is provided at one end of the cavity (101a). One end of the valve (306) is connected to the cavity (101a), and the other two ends are a one-way air intake channel (306a) and a one-way air outlet channel (306b), respectively. A reminder element (304) is provided inside the one-way air outlet channel (306b). The reminder element (304) is in the form of a whistle.

8. The open-end wrench according to claim 7, characterized in that: The screw fastener (303) includes a screw (303a) located in the cavity (101a) and a nut (303b) for moving the screw (303a), one end of the screw (303a) being fixedly connected to the piston (305).

9. The open-end wrench according to claim 8, characterized in that: The plate (101) is provided with a receiving groove (101c) for holding a complete set of gasket components (200) of various specifications. A cover plate (101d) is provided above the receiving groove (101c). The cover plate (101d) is inserted into a locking hole (101f) on the plate (101) through an extrusion piece (101e) with a cross-sectional area of ​​parallelogram.

10. The open-end wrench according to claim 9, characterized in that: A locking ring (101g) is provided on one end of the cover plate (101d) near the cavity (101a), and the screw (303a) is inserted into the locking ring (101g).

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