rivet nose and rivet gun

Abstract

The application relates to the riveting technical field and provides a riveting nose and a riveting gun. The riveting nose comprises a shell and a limiting piece, and can be applied to the riveting gun. A guide cavity of the shell can be used for containing a rivet, and the rivet can move in the guide cavity in the direction from a first opening to a second opening. When the rivet is arranged in the guide cavity, a riveting head can be overlapped on the limiting piece. When the rivet is moved from the first opening to the second opening under the action of external force, the rivet can drive the limiting piece to move along the axial direction of the guide cavity until the limiting piece moves to the side where the riveting head faces away from the riveting rod, so that the limiting piece can avoid the riveting head of the rivet, the riveting head can smoothly move in the direction from the first opening to the second opening, the limiting piece can play a role in limiting the rivet, the rivet can be prevented from turning during the movement in the guide cavity, and the riveting rod can always face the second opening.

Description

Technical Field

[0001] This application relates to the field of riveting technology, specifically to a rivet nose and a rivet gun. Background Technology

[0002] In the field of handheld riveting tools, especially when it comes to the rivet nose component of a rivet gun, a common technical requirement is to ensure that the rivet can be stably and smoothly guided and pushed to the designated position within its cavity so as to accurately align with the workpiece and perform riveting.

[0003] To meet this requirement, the inner diameter of the rivet nose in related technologies is typically designed to be slightly larger than the outer diameter of the rivet head, thus creating the necessary clearance to ensure smooth axial movement of the rivet and prevent jamming. However, this clearance-based guiding method has an inherent drawback due to its inherent principle: as the rivet moves along the cavity under axial thrust, it lacks continuous radial constraint, making it prone to radial misalignment or wobbling within the cavity. When the rivet becomes radially misaligned, its axis cannot be aligned with the outlet of the rivet nose cavity. This causes the rivet shank to not extend directly towards the outlet, thus affecting the accurate insertion of the rivet into the workpiece hole and ultimately adversely impacting the quality and reliability of the riveting operation. Summary of the Invention

[0004] This application provides a rivet nose and a rivet gun to solve the problem that the rivet in the rivet gun is prone to deflection when it moves in the related art.

[0005] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, this application provides a rivet nose, comprising: The housing has a guide cavity, a first opening and a second opening, the first opening and the second opening being connected to two sides of the guide cavity respectively, the guide cavity being used to accommodate a rivet, the rivet being configured to be driven to move within the guide cavity in a direction from the first opening to the second opening; A limiting member is disposed on the inner wall of the guide cavity. The limiting member is a movable structural member and has a limiting hole. The rivet includes a rivet head and a rivet rod. One end of the rivet rod is connected to the rivet head. The outer diameter of the rivet head is larger than the outer diameter of the rivet rod. When the rivet is placed in the guide cavity, the side of the rivet head facing the rivet rod is opposite to the limiting member. The rivet rod passes through the limiting hole. When the rivet head is driven to move in the direction from the first opening to the second opening, the rivet head pushes the limiting member to move so that the limiting member moves to the side of the rivet head opposite to the rivet rod.

[0006] In some embodiments, the limiting member is an elastically deformable structural member having a first side and a second side, the first side being connected to the inner wall of the guide cavity. When the rivet head is driven to move along the direction from the first opening to the second opening, the rivet head pushes the limiting member to deform, so that the second side moves toward the inner wall of the guide cavity.

[0007] In some embodiments, the limiting member is arranged circumferentially along the guide cavity.

[0008] In some embodiments, the limiting member has a limiting cavity for accommodating the rivet joint, the outer diameter of the rivet joint gradually decreasing along the axial direction of the rivet, and the inner diameter of the limiting cavity gradually decreasing along the direction from the first opening to the second opening, so that the rivet joint is fitted into the limiting cavity.

[0009] In some embodiments, the circumferential outer wall of the rivet joint is an arc surface, and the circumferential inner wall of the limiting cavity is an arc surface that mates with the circumferential outer wall of the rivet joint.

[0010] In some embodiments, the limiting member is made of rubber.

[0011] In some embodiments, the limiting member and the housing are integrally formed.

[0012] In some embodiments, there are multiple limiting members, and the multiple limiting members are spaced apart in the guide cavity along the direction from the first opening to the second opening.

[0013] In some embodiments, the thickness of the rivet joint is less than the gap between adjacent limiting members along the direction from the rivet joint to the rivet rod.

[0014] Secondly, based on the rivet nose described above, this application also provides a rivet gun, including the rivet nose described above.

[0015] In the rivet lug provided in this application, the guide cavity of the housing can be used to accommodate the rivet, and the rivet can move within the guide cavity in the direction from the first opening to the second opening. When the rivet is disposed within the guide cavity, the rivet head can overlap with the limiting member. When the rivet is moved from the first opening to the second opening by an external force, the rivet can push the limiting member to move axially along the guide cavity until the limiting member moves to the side of the rivet head facing away from the rivet rod. In this way, the limiting member can avoid the rivet head of the rivet, and the rivet head can move smoothly in the direction from the first opening to the second opening. Thus, the limiting member can limit the rivet and prevent the rivet from flipping during its movement within the guide cavity, so that the rivet rod can always face the second opening. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a rivet nose provided in an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the bottom of a rivet nose provided in an embodiment of this application.

[0019] Figure 3 for Figure 2 A cross-sectional schematic diagram of AA.

[0020] Figure 4 This is a three-dimensional structural diagram of a rivet nose provided in an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 100 - Housing; 110 - Guide cavity; 120 - First opening; 130 - Second opening; 200 - Limiting component; 210 - Limiting hole; 220 - First side; 230 - Second side; 240 - Limiting cavity; 300 - Rivet; 310 - Rivet joint; 320 - Rivet rod. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] In the field of handheld riveting tools, especially when it comes to the rivet nose component of a rivet gun, a common technical requirement is to ensure that the rivet can be stably and smoothly guided and pushed to the designated position within its cavity so as to accurately align with the workpiece and perform riveting.

[0024] To meet this requirement, the inner diameter of the rivet nose in related technologies is typically designed to be slightly larger than the outer diameter of the rivet head, thus creating the necessary clearance to ensure smooth axial movement of the rivet and prevent jamming. However, this clearance-based guiding method has an inherent drawback due to its inherent principle: as the rivet moves along the cavity under axial thrust, it lacks continuous radial constraint, making it prone to radial misalignment or wobbling within the cavity. When the rivet becomes radially misaligned, its axis cannot be aligned with the outlet of the rivet nose cavity. This causes the rivet shank to not extend directly towards the outlet, thus affecting the accurate insertion of the rivet into the workpiece hole and ultimately adversely impacting the quality and reliability of the riveting operation.

[0025] In the rivet lug proposed in this application, the guide cavity of the housing can be used to accommodate the rivet, and the rivet can move within the guide cavity along the direction from the first opening to the second opening. When the rivet is disposed within the guide cavity, the rivet head can overlap with the limiting member. When the rivet is moved from the first opening to the second opening by an external force, the rivet can push the limiting member to move axially along the guide cavity until the limiting member moves to the side of the rivet head facing away from the rivet rod. In this way, the limiting member can avoid the rivet head of the rivet, and the rivet head can move smoothly along the direction from the first opening to the second opening. Thus, the limiting member can limit the rivet, prevent the rivet from flipping during its movement within the guide cavity, and ensure that the rivet rod always faces the second opening.

[0026] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0027] This application proposes a riveting nose, with reference to Figures 1 to 4 As shown, it includes a housing 100 and a limiting member 200. This rivet nose can be applied to handheld riveting tools, such as rivet guns. In handheld riveting tools, the rivet nose is a key guiding component, its core function being to accommodate and guide the rivet 300 along a preset path to accurately deliver the rivet 300 to the workpiece to be riveted. To ensure the accuracy and reliability of the riveting operation, stable control of the movement trajectory of the rivet 300 within the rivet nose is crucial.

[0028] The housing 100 is the main structure of the rivet nose of this application, and can provide a mounting base for at least some other components of the rivet nose. A guide cavity 110 extending axially is formed inside the housing 100. This guide cavity 110 is used to accommodate one or more rivets 300 to be used before riveting operations and provides a channel for the axial movement of the rivets 300. A first opening 120 and a second opening 130 are respectively provided at both ends of the housing 100. Both the first opening 120 and the second opening 130 communicate with the guide cavity 110, thus jointly forming a channel for the rivets 300 to enter and exit the guide cavity 110. Specifically, the first opening 120 can be used to load the rivets 300 or connected to the rivet feeding mechanism of the rivet gun, while the second opening 130 serves as the outlet of the rivets 300, facing the workpiece to be riveted.

[0029] The rivet 300 includes a rivet head 310 and a rivet shank 320, one end of which is connected to the rivet head 310. The outer diameter of the rivet head 310 is designed to be larger than the outer diameter of the rivet shank 320 to form a reliable rivet head 310 portion after riveting. When the rivet 300 is placed within the guide cavity 110, the axis of the rivet 300 is parallel to the axial direction of the guide cavity 110, and the rivet shank 320 faces the second opening 130 of the housing 100.

[0030] A limiting member 200 is disposed on the inner wall of the guide cavity 110, and the limiting member 200 is a movable structural component. Specifically, the limiting member 200 is not fixedly disposed in the guide cavity 110 of the housing 100, but can change its position or shape under the action of external force. When the rivet 300 is placed in the guide cavity 110, the end face of the rivet head 310 facing the rivet rod 320 is in a relative position with the limiting member 200. This relative initial positional relationship allows the rivet head 310 to overlap the limiting member 200, so that the limiting member 200 can support or limit the rivet head 310 from one side. A limiting hole 210 is provided in the central area of ​​the limiting member 200. The size of the limiting hole 210 is designed to match the outer diameter of the rivet rod 320, and the limiting hole 210 allows the rivet rod 320 to pass through. When the rivet 300 is placed in the guide cavity 110, its rivet rod 320 passes through the limiting hole 210. The limiting hole 210 acts similarly to a bearing bushing, providing precise radial positioning and guidance for the rivet rod 320. Even if the rivet head 310 has a slight tendency to wobble, the rivet rod 320 passing through the limiting hole 210 can be quickly corrected to ensure that its axis is always consistent with the direction of movement.

[0031] During riveting, the drive mechanism of the riveting gun, such as a piston or push rod, applies a driving force, pushing the rivet 300 to move within the guide cavity 110 along the direction from the first opening 120 to the second opening 130. As the rivet 300 begins to move, its rivet head 310 contacts and acts on the limiting member 200. Since the limiting member 200 is movable, it moves under the push of the rivet head 310. This movement is intended to avoid the movement path of the rivet head 310. Specifically, the limiting member 200 moves from an initial position opposite to the side of the rivet head 310 facing the riveting rod 320 to the area already traversed by the rivet head 310, i.e., the limiting member 200 is located on the side of the rivet head 310 facing away from the riveting rod 320.

[0032] With the above configuration, when the rivet 300 is not driven, the limiting member 200 can provide support or constraint to the riveting joint 310 from one side, helping to maintain the initial posture of the rivet 300 in the guide cavity 110 and preventing the axis of the rivet 300 from deviating from the axis of the guide cavity 110 due to cavity clearance. When the rivet 300 is driven forward, the limiting member 200 can be smoothly pushed away, bent, or moved aside by the rivet 300, thus not hindering the normal axial movement of the rivet 300. This process effectively transforms the potential radial deviation tendency of the rivet 300 into a positive push on the movable limiting member 200, ensuring that the rivet 300, especially its riveting shank 320, maintains a stable alignment with the second opening 130 during movement, laying a reliable foundation for subsequent accurate alignment and riveting with the workpiece.

[0033] In some implementations, reference Figure 3 As shown, the limiting member 200 is a deformable structural component. When subjected to external force, the limiting member 200 can undergo elastic or plastic shape changes, rather than simply undergoing rigid displacement as a whole. Specifically, the limiting member 200 has a first side 220 and a second side 230. The first side 220 is fixedly or stably connected to the inner wall of the guide cavity 110, which provides a reliable mounting base for the limiting member 200 within the guide cavity 110. The second side 230 extends towards the central axis of the guide cavity 110 and is in a relatively free state.

[0034] When the rivet 300 is not driven to move along the direction from the first opening 120 to the second opening 130, the limiting member 200 maintains its initial shape due to its own structural rigidity or elasticity. At this time, the second side 230 of the limiting member 200 is located on the side of the rivet joint 310 facing the rivet rod 320, and plays a supporting or limiting role for the rivet joint 310. When the rivet joint 310 is driven to move along the direction from the first opening 120 to the second opening 130, an axial thrust is applied to the second side 230 of the limiting member 200. Since the limiting member 200 is a deformable structural member and its first side 220 is fixed, this thrust will mainly cause the limiting member 200 itself to deform, such as bending, folding or compressing. As a result of the deformation, the second side 230 of the limiting member 200 moves towards the inner wall of the guide cavity 110 to which it is connected under the push of the rivet joint 310, thereby making way for the rivet joint 310 to move forward.

[0035] By making the limiting member 200 a deformable structural component, on the one hand, the initial shape of the limiting member 200 can effectively restrict the radial degree of freedom of the rivet 300; on the other hand, the driving force required for the deformation process of the limiting member 200 is small, and the deformation action is smooth, which will not cause excessive resistance or impact on the axial movement of the rivet 300, thus ensuring the smoothness of the rivet 300's advancement.

[0036] In some implementations, reference Figure 3 As shown, the limiting member 200 can be configured to be arranged circumferentially along the guide cavity 110, and the limiting member 200 as a whole can be annular. In this way, the limiting member 200 can provide uniform and comprehensive support to the rivet joint 310 from the circumference, thereby preventing the rivet 300 from deflecting to the maximum extent.

[0037] In other embodiments, the limiting member 200 may also include multiple parts, all of which are flexible and variable structural components. The multiple limiting parts are distributed at intervals along the circumference of the guide cavity 110, so that the multiple limiting parts can respectively support multiple parts of the rivet joint 310 in the circumference and play a role in limiting the rivet 300 and preventing the rivet 300 from deflecting.

[0038] In some implementations, reference Figure 3 As shown, the limiting member 200 has a limiting cavity 240 for accommodating the rivet joint 310. The shape and size of the limiting cavity 240 are specifically designed to accommodate the rivet joint 310. Along the axial direction of the rivet 300, i.e., from the rivet joint 310 to the rivet shank 320, the outer diameter of the rivet joint 310 gradually decreases, forming a frustum-shaped structure. Correspondingly, along the direction from the first opening 120 to the second opening 130 of the housing 100, i.e., the direction of movement of the rivet 300, the inner diameter of the limiting cavity 240 is also designed to gradually decrease.

[0039] Therefore, the cavity shape of the limiting cavity 240 can fully match the shape of the rivet joint 310, allowing the rivet joint 310 to be embedded within the limiting cavity 240. The conical mating structure formed by the inner wall of the limiting cavity 240 and the outer wall of the rivet joint 310 produces an automatic centering effect. The radial deviation of the rivet 300 relative to the guide cavity 110 is guided back to the center position under the action of the conical contact, so that the central axis of the rivet 300 can be aligned with the central axis of the guide cavity 110. When the rivet 300 is pushed by a strong force, the rivet joint 310 will slide downward along the conical surface of the limiting cavity 240 and eventually push it open and disengage. During this process, the limiting member 200 always surrounds the rivet joint 310, which helps to maintain the stability of the axial direction of the rivet 300.

[0040] In some implementations, reference Figure 3 As shown, to facilitate smoother entry, insertion, and disengagement of the rivet joint 310 into the limiting cavity 240 of the limiting member 200, the circumferential outer wall of the rivet joint 310 is an arc surface, such as a spherical surface or a rounded corner surface with a large curvature. Correspondingly, the circumferential inner wall of the limiting cavity 240 is also set as an arc surface matching the outer wall of the rivet joint 310. Specifically, the inner wall of the limiting cavity 240 is... Figure 3 S-face in the middle.

[0041] The outer wall of the rivet joint 310 is made into an arc surface, which makes the stress at the connection between the rivet joint 310 and the rivet rod 320 more dispersed, avoids stress concentration, and thus enhances the structural stability of the rivet 300. The inner wall of the limiting cavity 240 is made into an arc surface, which allows the inner wall of the limiting cavity 240 to fully contact and fit with the outer wall of the rivet joint 310, thereby enhancing the limiting effect of the limiting member 200 on the rivet 300 and further preventing the rivet 300 from deflecting or overturning in the guide cavity 110.

[0042] Furthermore, the arc-shaped contact between the outer wall of the rivet joint 310 and the inner wall of the guide cavity 110 is a sliding friction, and the contact stress distribution is more uniform, which can effectively reduce the frictional resistance and surface wear during the movement of the rivet 300. When the rivet joint 310 expands the limiting member 200 to deform, the arc-shaped guidance can make the deformation process of the limiting member 200 more continuous and stable, avoid stress concentration, and help extend the service life of the limiting member 200.

[0043] In some embodiments, the limiting member 200 is made of rubber. Rubber materials, including various elastomers such as natural rubber, silicone rubber, and nitrile rubber, have excellent elastic deformation capacity and high resilience. Using it to manufacture the limiting member 200 allows the limiting member 200 to be deformable and to recover its deformation capacity.

[0044] Under the push of the rivet 310, the rubber limiting member 200 is easily bent and compressed. After the rivet 300 passes, the limiting member 200 can quickly return to its original shape, ready to guide the next rivet 300. In addition, the rubber material also has certain wear resistance and cushioning and shock absorption characteristics, which can adapt to the repeated impact and friction of the rivet 300. Of course, those skilled in the art will understand that other materials with similar elasticity and wear resistance, such as polyurethane and elastic plastics, can also be used to manufacture the limiting member 200, and this application does not limit this.

[0045] In some embodiments, the limiting member 200 and the housing 100 are integrally molded. Specifically, this can be achieved through a mold injection molding process, such as secondary injection molding or co-injection molding of the housing 100 and the limiting member 200.

[0046] By integrally molding the housing 100 and the limiting member 200, gaps or looseness that may occur between the limiting member 200 and the housing 100 during assembly can be eliminated, ensuring a firm and reliable connection between them. Furthermore, the use of additional connectors to link the housing 100 and the limiting member 200 is avoided, simplifying the manufacturing and assembly process of the rivet nose and reducing its production cost. Finally, a better sealing effect and stress transition are achieved at the joint between the limiting member 200 and the housing 100, improving the durability and reliability of the rivet nose.

[0047] In some implementations, reference Figure 3 As shown, the number of limiting members 200 is set to multiple, and the multiple limiting members 200 are spaced apart on the inner wall of the guide cavity 110 along the direction from the first opening 120 to the second opening 130.

[0048] As the rivet 300 moves within the longer guide cavity 110, it sequentially contacts, pushes, and passes each limiting member 200. Each limiting member 200 can correct and stabilize the current posture of the rivet 300 at its position, thereby ensuring that the rivet 300 maintains axial alignment to the maximum extent throughout its stroke, effectively preventing the risk of skewness accumulated and amplified due to excessive stroke.

[0049] In some implementations, reference Figure 3As shown, along the direction from the rivet joint 310 to the rivet rod 320, the thickness of the rivet joint 310 is less than the gap between two adjacent limiting members 200. Specifically, the gap between two adjacent limiting members 200 is the axial space between the lower edge of the upper limiting member 200 and the upper edge of the lower limiting member 200 in the same axial direction. By setting the gap between two adjacent limiting members 200 to be greater than the thickness of the rivet joint 310, once the rivet joint 310 of a rivet 300 has completely passed through the upper limiting member 200 and the limiting member 200 has recovered its deformation, the rivet joint 310 has sufficient space to be completely free before reaching the lower limiting member 200, without simultaneously contacting both limiting members 200 and getting stuck. This ensures the continuity and rhythm of the rivet 300's movement, avoiding jamming, pauses, or abnormal increases in driving force caused by dimensional interference, making the rivet 300's movement smooth and controllable.

[0050] In some embodiments, the housing 100 of this application includes a first housing portion, a second housing portion, and a fixing portion. The first housing portion and the second housing portion are disposed opposite to each other, and the fixing portion is sleeved on the first housing portion and the second housing portion to fix the first housing portion and the second housing portion together. The limiting member 200 may be provided with two limiting portions, which may be respectively disposed on the first housing portion and the second housing portion. After the first housing portion and the second housing portion are mated, the two limiting portions can be mated. This simplifies the manufacturing process of the housing 100.

[0051] Based on the rivet nose described above, this application also proposes a riveting gun, including the rivet nose described above. The riveting gun further includes a gun body, with the rivet nose disposed within the gun body. A rivet feeding mechanism within the gun body can sequentially feed multiple rivets 300 into the guide cavity 110 of the housing 100. A driving mechanism within the gun body can drive the rivets 300 to move along the direction from the first opening 120 to the second opening 130 to rivet the workpiece.

[0052] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0053] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0054] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0055] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rivet nose, characterized in that, include: The housing (100) has a guide cavity (110), a first opening (120) and a second opening (130), the first opening (120) and the second opening (130) being connected to both sides of the guide cavity (110), the guide cavity (110) being used to accommodate a rivet (300), the rivet (300) being configured to be driven to move within the guide cavity (110) in a direction from the first opening (120) to the second opening (130); A limiting member (200) is disposed on the inner wall of the guide cavity (110). The limiting member (200) is a movable structural member and has a limiting hole (210). The rivet (300) includes a rivet head (310) and a rivet rod (320). One end of the rivet rod (320) is connected to the rivet head (310). The outer diameter of the rivet head (310) is larger than the outer diameter of the rivet rod (320). When the rivet (300) is placed in the guide cavity (110), the side of the rivet head (310) facing the rivet rod (320) is opposite to the limiting member (200). The rivet rod (320) passes through the limiting hole (210). When the rivet joint (310) is driven to move in the direction from the first opening (120) to the second opening (130), the rivet joint (310) pushes the limiting member (200) to move so that the limiting member (200) moves to the side of the rivet joint (310) away from the rivet rod (320).

2. The rivet nose according to claim 1, characterized in that, The limiting member (200) is an elastically deformable structural member. The limiting member (200) has a first side (220) and a second side (230). The first side (220) is connected to the inner wall of the guide cavity (110). When the rivet head (310) is driven to move along the direction from the first opening (120) to the second opening (130), the rivet head (310) pushes the limiting member (200) to deform so that the second side (230) moves toward the inner wall of the guide cavity (110).

3. The rivet nose according to claim 2, characterized in that, The limiting member (200) is arranged circumferentially along the guide cavity (110).

4. The rivet nose according to claim 2, characterized in that, The limiting member (200) has a limiting cavity (240) for accommodating the rivet joint (310). Along the axial direction of the rivet (300), the outer diameter of the rivet joint (310) gradually decreases, and along the direction from the first opening (120) to the second opening (130), the inner diameter of the limiting cavity (240) gradually decreases, so that the rivet joint (310) is embedded in the limiting cavity (240).

5. The rivet nose according to claim 4, characterized in that, The outer circumferential wall of the rivet joint (310) is an arc surface, and the inner circumferential wall of the limiting cavity (240) is an arc surface that mates with the outer circumferential wall of the rivet joint (310).

6. The rivet nose according to any one of claims 1-5, characterized in that, The limiting component (200) is made of rubber.

7. The rivet nose according to claim 6, characterized in that, The limiting member (200) and the housing (100) are integrally formed.

8. The rivet nose according to any one of claims 1-5, characterized in that, The number of limiting members (200) is multiple, and the multiple limiting members (200) are spaced apart in the guide cavity (110) along the direction from the first opening (120) to the second opening (130).

9. The rivet nose according to claim 8, characterized in that, Along the direction from the rivet joint (310) to the rivet rod (320), the thickness of the rivet joint (310) is less than the gap between the adjacent limiting members (200).

10. A rivet gun, characterized in that, Includes the rivet nose as described in any one of claims 1-9.

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