Connection structure and its handle

Abstract

This utility model discloses a connecting structure and a handle including the same. The connecting structure is used for the shaft of door and window fittings. The connecting structure includes: a snap-fit ​​ring, which includes a ring body and an elastic arm; the ring body is used to fit onto the shaft, and the ring body has a shaft hole; the elastic arm is connected to the ring body, and the elastic arm is located in front of the ring body in the axial direction of the shaft hole; a fixing nut is used to screw onto the shaft, and the outer peripheral sidewall of the fixing nut is provided with a first groove and a protrusion; when the fixing nut rotates in the tightening direction, the protrusion can push against the elastic arm, so that the elastic arm deforms away from the shaft hole. After the protrusion passes the elastic arm, the elastic arm will recover its deformation under its own elastic force and automatically snap into the first groove on the fixing nut, thereby restricting the rotation of the fixing nut in the loosening direction. Under the premise of ensuring normal use of the handle, there is no need for manual bending operation, avoiding assembly problems caused by human operation errors, and improving the assembly quality of door and window fittings.

Description

Technical Field

[0001] This utility model belongs to the technical field of door and window hardware accessories, specifically relating to a connection structure and a handle including therefrom. Background Technology

[0002] In existing technologies, handles typically include a lock cylinder opening and closing assembly, a panel cover, and a connecting sleeve. The lock cylinder opening and closing assembly has a retaining spring located on the outside of the panel cover and abutting against its outer end face. The assembly includes a lock cylinder body and a sleeve fitted onto it. A connecting seat is located at the end of the sleeve furthest from the panel cover, and this connecting seat is fixedly connected to the handle body. The other end of the sleeve connects to both the panel cover and the connecting sleeve. The retaining spring is positioned within a connecting groove on the sleeve. Therefore, the connecting sleeve and the panel cover are confined between the connecting seat and the retaining spring. The spring limits the movement of each component in the axial direction to ensure that the handle can work normally. For details, please refer to the combined installation structure of the handle lock disclosed in the authorization announcement number CN217812833U. However, in the actual assembly of the handle of the prior art, it was found that the assembly precision requirements of the above structure are extremely high. For example, the assembly precision of the gap between the connecting groove on the bushing and the outer end face of the panel cover is high. If the gap is too large, it is very easy to cause the handle to loosen; or, if the gap is too small, the retaining spring cannot be installed. There is room for improvement.

[0003] To address the aforementioned issues, Chinese Patent Publication No. CN118686484A discloses a handle and a connection structure for a fixing nut. The handle includes: a handle body, a lock cylinder body, a bushing fitted onto the lock cylinder body, and a panel cover. The panel cover has a through-hole. The bushing passes through the mounting hole of the panel cover and is threadedly connected to a fixing nut. A snap-fit ​​ring is provided between the fixing nut and the panel cover, and the snap-fit ​​ring is fitted onto the bushing. The snap-fit ​​ring snaps into the bushing and has a bendable first snap block. The fixing nut has multiple first snap grooves spaced apart. When the fixing nut is tightened, the first snap block bends and snaps into any one of the first snap grooves on the fixing nut. This design reduces the required assembly precision while ensuring normal use of the handle, thereby improving assembly efficiency. Simultaneously, the snap-fit ​​ring effectively prevents the fixing nut from loosening after tightening. However, in the actual assembly of the handle of the prior art, after the fixing nut is tightened, the first locking block needs to be bent manually to engage the first locking block in the first locking slot, which is inconvenient and may result in the first locking block not being bent into the first locking slot due to misoperation, thus affecting the assembly quality and efficiency of the handle. Utility Model Content

[0004] In order to overcome at least one of the defects described in the prior art, the present invention provides a connecting structure and a handle including the connecting structure to solve the problems of high assembly precision requirements, inconvenient assembly, and possible assembly errors in the prior art for door and window accessories. Under the premise of ensuring the normal use of door and window accessories, the present invention reduces the required assembly precision, improves assembly efficiency, and effectively prevents the connecting parts from loosening.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A connecting structure for a shaft of door and window fittings, the connecting structure comprising: a snap-fit ​​ring, the snap-fit ​​ring comprising a ring body and an elastic arm; the ring body being sleeved on the shaft, the ring body having a shaft hole, the elastic arm being connected to the ring body, the elastic arm being located in front of the ring body in the axial direction of the shaft hole; and a fixing nut for screwing onto the shaft, the outer peripheral sidewall of the fixing nut having a first groove and a protrusion; when the fixing nut rotates in the tightening direction, the protrusion can push against the elastic arm, causing the elastic arm to deform away from the shaft hole; when the protrusion passes the elastic arm, the elastic arm returns to its original deformation and snaps into the first groove to restrict the rotation of the fixing nut in the loosening direction.

[0007] According to some embodiments of the present invention, the outer peripheral sidewall of the ring body is provided with a plurality of elastic arms, and the outer peripheral sidewall of the fixing nut is provided with a plurality of first slots.

[0008] According to some embodiments of this utility model, the number of the first slots is greater than the number of the elastic arms.

[0009] According to some embodiments of this utility model, the elastic arm includes a first elastic arm and a second elastic arm. The first elastic arm is connected to the ring body, and the second elastic arm is connected to the first elastic arm. In the axial direction of the shaft hole, both the first elastic arm and the second elastic arm are located in front of the ring body, and the first elastic arm and the second elastic arm are arranged sequentially along the circumference of the ring body. The elastic arm is inclined away from the shaft hole, and the second elastic arm is bent relative to the first elastic arm towards the shaft hole. When the fixing nut rotates in the tightening direction, the protrusion can push against the second elastic arm to deform the second elastic arm away from the shaft hole. After the protrusion passes the second elastic arm, the second elastic arm returns to its original shape and is engaged in the first slot to restrict the rotation of the fixing nut in the loosening direction.

[0010] According to some embodiments of the present invention, the elastic arm further includes a cantilever, which protrudes from the outer peripheral sidewall of the ring body, and the first elastic arm is connected to the cantilever.

[0011] According to some embodiments of the present invention, the second elastic arm has a relief portion and a pressure-receiving portion. In the axial direction of the shaft hole, the ring body, the pressure-receiving portion and the relief portion are arranged in sequence. The relief portion is located outside the outermost rotation trajectory of the protrusion, and the pressure-receiving portion is located inside the outermost rotation trajectory of the protrusion.

[0012] According to some embodiments of this utility model, the projection of the first elastic arm toward the axial direction of the shaft hole is defined as the first projection, and the projection of the fixed nut toward the axial direction of the shaft hole is defined as the second projection, wherein the outermost contour of the first projection is located outside the outermost contour of the second projection.

[0013] According to some embodiments of the present invention, the included angle between the first elastic arm and the second elastic arm is an obtuse angle.

[0014] According to some embodiments of this utility model, the snap ring is integrally made of a spring sheet.

[0015] In addition, this utility model also provides a handle, the handle including the connection structure as described in any of the above embodiments, and further including a control seat and a functional structure. The control seat is used to connect the locking rod of the lock cylinder. The control seat includes a seat body and a shaft. The shaft is connected to the seat body. The functional structure is disposed on the shaft. The ring body is sleeved on the shaft through the shaft hole. The fixing nut is screwed to the shaft. After the fixing nut is tightened, the control seat and the functional structure are positioned at the upper limit of the axial direction of the shaft.

[0016] According to some embodiments of the present invention, one of the shaft body and the ring body is provided with a second slot, and the other of the two is provided with a snap-fit ​​arm, which snaps into the second slot.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] The elastic arm possesses a certain degree of elasticity, allowing it to deform under external force and return to its original shape after the force disappears. During assembly, the ring body is first fitted onto the shaft of the door / window fitting, and then the fixing nut is screwed into the shaft. As the fixing nut rotates in the tightening direction, the protrusion gradually pushes against the elastic arm. Due to the elasticity of the arm, under the pushing action of the protrusion, the elastic arm deforms away from the shaft hole to allow the fixing nut to gradually screw in. As the fixing nut continues to rotate, the protrusion passes over the elastic arm, and the elastic arm is no longer subjected to the pushing force of the protrusion. Simultaneously, the first slot is engaged with the elastic arm. In the relative position, the elastic arm recovers its deformation and automatically engages in the first slot to restrict the rotation of the fixing nut in the loosening direction. In this way, when the fixing nut rotates to achieve tightening, the fixing nut can limit the axial position of the door and window fitting components on the shaft. Moreover, the engagement between the elastic arm and the first slot can effectively prevent the fixing nut from loosening after tightening. Under the premise of ensuring normal use of the handle, there is no need for manual bending operation, avoiding assembly problems caused by human operation errors, reducing the required assembly precision, improving assembly efficiency, and improving the assembly quality and stability of door and window fittings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the handle according to an embodiment of this application;

[0021] Figure 2 This is a front view structural diagram of the handle according to an embodiment of this application;

[0022] Figure 3 This is an exploded structural diagram of the handle according to an embodiment of this application;

[0023] Figure 4 This is a front view schematic diagram of the connection structure according to an embodiment of this application;

[0024] Figure 5 This is an exploded structural diagram of the connection structure according to an embodiment of this application.

[0025] Explanation of key figure labels:

[0026] 1. Snap-fit ​​ring; 11. Ring body; 111. Shaft hole; 12. Elastic arm; 121. First elastic arm; 122. Second elastic arm; 1221. Arc-shaped transition section; 1222. Free end; 123. Cantilever; 13. Snap-fit ​​arm; 2. Fixing nut; 21. First slot; 22. Protrusion; 3. Control seat; 31. Seat body; 32. Shaft; 321. Second slot; 4. Functional structure; 41. Elastic ring; 42. Connecting plate; 421. Hole; 422. Slot; 5. Handle seat; 51. Connecting sleeve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0029] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0030] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0031] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0032] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0033] Example 1

[0034] Please see Figures 1 to 5 This application provides a connection structure for a shaft 32 of a door and window fitting. The connection structure includes a snap ring 1 and a fixing nut 2. The snap ring 1 includes a ring body 11 and an elastic arm 12. The ring body 11 is fitted onto the shaft 32 and has a shaft hole 111. The elastic arm 12 is connected to the ring body 11 and is located in front of the ring body 11 along the axial direction of the shaft hole 111. The fixing nut 2 is screwed onto the shaft 32. The outer peripheral sidewall of the fixing nut 2 has a first groove 21 and a protrusion 22. When the fixing nut 2 rotates in the tightening direction, the protrusion 22 can push against the elastic arm 12, causing the elastic arm 12 to deform away from the shaft hole 111. After the protrusion 22 passes over the elastic arm 12, the elastic arm 12 returns to its original shape and snaps into the first groove 21 to restrict the rotation of the fixing nut 2 in the loosening direction.

[0035] It should be noted that, given the extremely high assembly precision required for the existing grips that use a snap-fit ​​structure with a retaining ring and bushing for positioning, this grip, during its development, utilizes a threaded connection between the fixing nut 2 and the shaft 32 for positioning, effectively reducing the required assembly precision. However, during multiple development tests, it was found that the fixing nut 2 is prone to loosening after prolonged use. Therefore, a snap-fit ​​ring 1 is also provided between the shaft 32 and the fixing nut 2 to prevent loosening after tightening.

[0036] The connection structure provided in this application embodiment has an elastic arm 12 that has a certain elasticity, allowing it to deform under external force and return to its original shape after the external force disappears. During assembly, the ring body 11 is first fitted onto the shaft 32 of the door / window fitting, and then the fixing nut 2 is screwed into the shaft 32. When the fixing nut 2 rotates in the tightening direction, the protrusion 22 gradually pushes against the elastic arm 12. Due to the elasticity of the elastic arm 12, under the pushing action of the protrusion 22, the elastic arm 12 deforms away from the shaft hole 111 to allow the fixing nut 2 to gradually screw in. As the fixing nut 2 continues to rotate, the protrusion 22 passes over the elastic arm 12, and the elastic arm 12 is no longer subjected to the protrusion 22. The first slot 21 is positioned opposite the elastic arm 12, and the elastic arm 12 recovers its deformation and automatically engages in the first slot 21 to limit the rotation of the fixing nut 2 in the loosening direction. In this way, when the fixing nut 2 rotates to the tightened position, the fixing nut 2 can limit the components of the door and window fittings in the axial direction of the shaft 32. The engagement between the elastic arm 12 and the first slot 21 can effectively prevent the fixing nut 2 from loosening after being locked. Under the premise of ensuring normal use of the handle, there is no need for manual bending operation, avoiding assembly problems caused by human operation errors, reducing the required precision for assembly, improving assembly efficiency, and improving the assembly quality and stability of door and window fittings.

[0037] like Figure 4 As shown, in one embodiment, the ring body 11 and the fixing nut 2 are stacked along the axial direction of the shaft hole.

[0038] In one embodiment, the ring body 11 is fixed relative to the shaft body 32 after being sleeved on the shaft body 32.

[0039] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, in one embodiment, the outer peripheral sidewall of the fixing nut 2 is recessed with a plurality of first slots 21, and the outer peripheral sidewall of the ring body 11 is provided with a plurality of elastic arms 12. By providing a plurality of first slots 21 and a plurality of elastic arms 12, when the fixing nut 2 is tightened into place, an elastic arm 12 and a first slot 21 that can be engaged can be quickly found, thereby improving assembly efficiency. At the same time, it is also convenient to process the first slots 21 on the fixing nut 2 and the elastic arms 12 on the ring body 11, thereby reducing manufacturing costs. Understandably, in existing connection structures, after tightening the fixing nut, the first locking block needs to be bent to engage with the first locking slot. However, the specific installation position of the fixing nut after tightening is uncertain, as is which first locking block needs to be bent. Therefore, when tightening the fixing nut, manual observation of the installation position and bending of the appropriate first locking block to engage with the first locking slot are required. This necessitates manual rotation of the fixing nut and bending of the first locking block, making automated tightening of the fixing nut difficult. In contrast, this... In the connection structure described in this embodiment, regardless of the installation position of the fixed nut 2 after it has been tightened, at least one elastic arm 12 will recover its deformation and automatically engage in the first slot 21 to restrict the rotation of the fixed nut 2 in the loosening direction. There is no need to manually observe the specific installation position of the fixed nut 2 after it has been tightened, nor is there any need to manually intervene in the engagement between the elastic arm 12 and the first slot 21. Therefore, it is not necessary to manually tighten the fixed nut 2. Thus, the tightening operation of the fixed nut 2 can be realized by automated equipment, thereby achieving automated assembly. For example, the automated equipment can be a fully automated nut tightening machine.

[0040] like Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, a plurality of first slots 21 can be evenly distributed on the outer peripheral sidewall of the fixing nut 2, and a plurality of elastic arms 12 can be evenly distributed on the outer peripheral sidewall of the ring body 11, so as to further improve the assembly efficiency of the snap-fit.

[0041] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, the outer peripheral sidewall of the fixing nut 2 is provided with a plurality of protrusions 22, so that the plurality of protrusions 22 can fully push against the plurality of elastic arms 12, thereby realizing the reliable rotation of the fixing nut 2 along the tightening direction.

[0042] In one embodiment, the ring body 11 and the elastic arm 12 can be integrally formed, such as by injection molding or integral bending.

[0043] In one embodiment, the ring body 11 and the elastic element may be, but are not limited to, welded connections, and the choice can be made according to actual needs, without being limited to a single method.

[0044] like Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, the number of first slots 21 is greater than the number of elastic arms 12. Since actual experiments have shown that only one elastic arm 12 needs to be engaged in one first slot 21 to effectively prevent the fixing nut 2 from loosening after tightening, once the fixing nut 2 is tightened, it is not necessary for multiple elastic arms 12 and multiple first slots 21 to be engaged one-to-one. Furthermore, to improve assembly efficiency, the number of first slots 21 needs to be greater than the number of elastic arms 12, so that the elastic arms 12 can more quickly find the nearest and engageable first slot 21.

[0045] It is understandable that when tightening the fixing nut 2, if multiple elastic arms 12 engage with multiple first slots respectively, the simultaneous force at multiple points will generate significant friction and resistance, affecting the rotation of the fixing nut 2. To solve the above problem, in one embodiment, please refer to... Figure 4 When one elastic arm 12 is engaged in a first slot 21, the other elastic arms 12 and the other first slots 21 will be misaligned. This avoids the superposition of resistance caused by multiple simultaneous engagements, thereby reducing the resistance encountered by the fixing nut 2 during tightening. This allows the operator to complete the tightening operation more easily, especially in some scenarios where space is limited or operation is inconvenient. Furthermore, less resistance means less friction between the elastic arm 12 and the first slot 21, reducing wear on the components during tightening and extending the service life of the components.

[0046] like Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, there are 12 first slots 21 and 7 elastic arms 12. This arrangement ensures both the effective snap-fit ​​assembly and the structural strength.

[0047] It should be noted that in some other embodiments, the elastic arm 12 may also be disposed on the side of the ring body 11 facing the fixing nut 2.

[0048] It should be noted that in some other embodiments, the number of first slots 21 may be less than or equal to the number of elastic arms 12. The choice can be made according to actual needs and is not limited here.

[0049] like Figure 3 , Figure 4 and Figure 5As shown, in one embodiment, the elastic arm 12 includes a first elastic arm 121 and a second elastic arm 122. The first elastic arm 121 is connected to the ring body 11, and the second elastic arm 122 is connected to the first elastic arm 121. In the axial direction of the shaft hole 111, both the first elastic arm 121 and the second elastic arm 122 are located in front of the ring body 11, and the first elastic arm 121 and the second elastic arm 122 are arranged sequentially along the circumference of the ring body 11. The elastic arm 12 is inclined in a direction away from the shaft hole 111, and the second elastic arm 122 is bent relative to the first elastic arm 121 in a direction closer to the shaft hole 111. When the fixing nut 2 rotates in the tightening direction, the protrusion 22 can push against the second elastic arm 122, so that the second elastic arm 122 deforms in a direction away from the shaft hole 111. After the protrusion 22 passes over the second elastic arm 122, the second elastic arm 122 returns to its deformed state and automatically engages in the first slot 21 to limit the rotation of the fixing nut 2 in the loosening direction. With this configuration, firstly, both the first elastic arm 121 and the second elastic arm 122 are inclined away from the shaft hole 111, and the second elastic arm 122 is bent towards the shaft hole 111 relative to the first elastic arm 121. This inclination and bending design plays an important role when the fixing nut 2 rotates in the tightening direction. When the protrusion 22 pushes against the second elastic arm 122, the inclined elastic arm 12 structure provides guidance for the tightening of the fixing nut 2. The inclined surface allows the fixing nut 2 to push the second elastic arm 122 more smoothly, causing it to deform away from the shaft hole 111, reducing the resistance during the tightening process, reducing the force required by the operator, avoiding wear of parts due to sudden collisions or jamming, and improving the convenience and efficiency of assembly. After the protrusion 22 passes the second elastic arm 122... The bending design of the second elastic arm 122 relative to the first elastic arm 121 allows the second elastic arm 122 to be stably and reliably automatically engaged in the first slot 21. Secondly, when the fixing nut 2 is tightened, the second elastic arm 122 recovers its deformation to automatically engage in the first slot 21. The presence of the first elastic arm 121 provides additional support and stability for this engagement. The first elastic arm 121 is connected to the ring body 11, and the second elastic arm 122 is connected to the first elastic arm 121. This hierarchical structure allows the second elastic arm 122 to obtain more stable support during engagement, enhancing the firmness of the engagement. Even under large external forces, the second elastic arm 122 is not easy to come out of the first slot 21, effectively limiting the rotation of the fixing nut 2 in the loosening direction and ensuring the long-term stability of the connection structure.

[0050] like Figure 3 , Figure 4 and Figure 5As shown, in one embodiment, the second elastic arm 122 includes an arc-shaped transition section 1221 and a free end 1222. The arc-shaped transition section 1221 is connected between the first elastic arm 121 and the free end 1222. The free end 1222 is disposed away from the first elastic arm 121. The first elastic arm 121, the arc-shaped transition section 1221 and the free end 1222 are arranged sequentially around the shaft hole 111. After the fixing nut 2 is tightened, the free end 1222 is inserted into the first slot 21. Thus, firstly, the design of the arc-shaped transition section 1221 allows the second elastic arm 122 to deform more smoothly when subjected to force. Compared with straight sections or other shaped transitions, the arc-shaped transition section 1221 can better adapt to stress changes during the deformation process, reducing the risk of damage to the elastic arm 12 due to stress concentration. When the fixing nut 2 is tightened and pushes against the second elastic arm 122, thereby causing the second elastic arm 122 to deform, the arc-shaped transition section 1221 can guide the force to be transmitted evenly, making the deformation process more stable and controllable. Secondly, the free end 1222 is positioned away from the first elastic arm 121, allowing the second elastic arm 122 to more accurately engage with the first slot 21 after recovering its deformation. The arc-shaped transition section 1221 provides a suitable trajectory for the movement of the free end 1222, ensuring that the free end 1222 can smoothly reach the position of the first slot 21 and fit tightly against the inner wall of the first slot 21. This precise engagement method improves the reliability of the engagement and prevents the fixing nut 2 from loosening during use. Furthermore, once the free end 1222 of the second elastic arm 122 engages with the first slot 21, the structure of the arc-shaped transition section 1221 and the free end 1222 can provide a stable engagement force. The elastic characteristics of the arc-shaped transition section 1221 allow the engagement part to maintain a certain elastic buffer when subjected to external force, reducing the risk of engagement failure due to vibration or impact. At the same time, the tight fit between the free end 1222 and the first slot 21 also enhances the stability of the engagement, ensuring that the connection structure can work reliably under various working conditions.

[0051] like Figure 3 , Figure 4 and Figure 5As shown, in one embodiment, the elastic arm 12 further includes a cantilever 123, which protrudes from the outer peripheral sidewall of the ring body 11, and the first elastic arm 121 is connected to the cantilever 123. This configuration has several advantages. First, the presence of the cantilever 123 increases the overall length and deformable space of the elastic arm 12, allowing the first elastic arm 121 to undergo elastic deformation over a wider range. This means that during the tightening of the fixing nut 2, the elastic arm 12 can more flexibly adapt to changes in the position of the fixing nut 2 and the magnitude of the tightening force, ensuring that the second elastic arm 122 can smoothly engage in the first slot 21. Simultaneously, during the use of the connection structure, the larger elastic deformation range can better cope with various complex stress conditions, improving the adaptability and stability of the connection structure. Secondly, the cantilever 123 protrudes from the outer peripheral sidewall of the ring body 11, which is equivalent to adding an extra elastic structure to the first elastic arm 121. When the fixing nut 2 is tightened and pushes the second elastic arm 122 or the connecting structure is subjected to external force, the cantilever 123 can undergo elastic deformation, absorb some energy, and play a buffering role. This elastic buffer can reduce the damage to the elastic arm 12 and the fixing nut 2 caused by sudden external force impact and extend the service life of the components.

[0052] Please see Figure 4 and Figure 5 The second elastic arm 122 has a clearance portion and a pressure-bearing portion. Along the axial direction of the shaft hole 111, the ring body 11, the pressure-bearing portion, and the clearance portion are arranged sequentially. The clearance portion is located outside the outermost rotation trajectory of the protrusion 22, and the pressure-bearing portion is located inside the outermost rotation trajectory of the protrusion 22. Thus, when the fixing nut 2 rotates along the tightening direction, the presence of the clearance portion allows the fixing nut 2 to gradually move axially towards the ring body 11 during rotation, enabling the fixing nut 2 to be smoothly screwed in for tightening, ensuring the feasibility and smoothness of the fixing nut 2 installation operation. The presence of the pressure-bearing portion is to accept the pushing force of the protrusion 22, thereby causing the second elastic arm 122 to elastically deform in a direction away from the shaft hole 111, and providing a structural basis for subsequent reset. Specifically, the outermost rotation trajectory of the protrusion 22 can be referenced... Figure 4 The dashed line in the middle.

[0053] Please see Figure 4 and Figure 5The projection of the first elastic arm 121 onto the axis of the shaft hole 111 is defined as the first projection, and the projection of the fixing nut 2 onto the axial direction of the shaft hole 111 is defined as the second projection. It is understood that during the tightening process of the fixing nut 2, it needs to rotate relative to the ring body 11. If the outermost contour of the first projection does not exceed the second projection, the fixing nut 2 and the first elastic arm 121 are prone to spatial conflict during rotation, leading to mutual interference. To avoid the above problem, in one embodiment, the outermost contour of the first projection is located outside the outermost contour of the second projection. This design ensures that when the fixing nut 2 rotates, the first elastic arm 121 will not obstruct the movement trajectory of the fixing nut 2, avoiding jamming or stuck phenomena caused by interference, allowing the fixing nut 2 to be tightened smoothly, and improving assembly efficiency and quality. Furthermore, during the tightening of the fixing nut 2, the pushing action of the protrusion 22 will cause the second elastic arm 122 to deform away from the shaft hole 111. The design of the first projection exceeding the second projection provides sufficient space for the deformation of the second elastic arm 122, ensuring that the second elastic arm 122 can smoothly complete its deformation and accurately engage in the first slot 21. If the space is insufficient, the second elastic arm 122 may not be able to deform normally, resulting in engagement failure or insecure engagement. In addition, during the actual tightening process, the fixing nut 2 may not rotate strictly according to the ideal angle, and there will be a certain angular deviation. The large projection range of the first elastic arm 121 provides tolerance for this angular deviation. Even if the fixing nut 2 deflects slightly during tightening, the first elastic arm 121 will not interfere with it, ensuring the flexibility and reliability of the tightening operation.

[0054] Please see Figure 4 In one embodiment, the included angle between the first elastic arm 121 and the second elastic arm 122 is an obtuse angle. This obtuse angle design allows the first elastic arm 121 and the second elastic arm 122 to deform more smoothly under force. Furthermore, the obtuse angle between the first elastic arm 121 and the second elastic arm 122 allows the second elastic arm 122 to generate a greater locking force after deformation. When the second elastic arm 122 is engaged in the first slot 21, the obtuse angle structure allows the engaging part to better fit against the inner wall of the slot, increasing the friction and contact area of ​​the engagement, thereby improving the reliability of the engagement and preventing the fixing nut 2 from loosening during use.

[0055] like Figure 3 and Figure 5 As shown, in one embodiment, the top end of the first slot 21 extends to the top end of the fixed nut 2 and the bottom end extends to the bottom end of the fixed nut 2 in the height direction of the fixed nut 2. This arrangement is equivalent to providing a vertically penetrating slot structure on the outer peripheral sidewall of the fixed nut 2. Firstly, it has low manufacturing cost, and secondly, it facilitates the insertion of the elastic arm 12 into the first slot 21. The structure is simple and easy to implement.

[0056] In one embodiment, the snap ring 1 is integrally formed from a spring sheet. In a specific embodiment, the snap ring 1 is integrally formed from a resilient steel sheet.

[0057] It should be noted that the elastic arm 12 can also be connected to the ring body 11 by means of welding, pinning, or crimping, etc., as required by actual needs, and is not limited to one method here.

[0058] Example 2

[0059] Please see Figure 1 , Figure 2 and Figure 3 In addition, this application embodiment also provides a handle, which includes the connection structure as described in any of the embodiments in Embodiment 1, and also includes a control seat 3 and a functional structure 4. The control seat 3 is used to connect the lock rod of the lock cylinder, and the functional structure 4 is used to provide support for the function of the handle. The control seat 3 includes a seat body 31 and a shaft 32. The shaft 32 is connected to the seat body 31, and the functional structure 4 is disposed on the shaft 32. The ring body 11 is sleeved on the shaft 32 through the shaft hole 111. The fixing nut 2 is screwed to the shaft 32. After the fixing nut 2 is tightened, the control seat 3 and the functional structure 4 are positioned at the upper limit in the axial direction of the shaft 32. Specifically, when the fixing nut 2 rotates in the tightening direction, the protrusion 22 will gradually push against the elastic arm 12. Since the elastic arm 12 is elastic, under the pushing action of the protrusion 22, the elastic arm 12 will deform in a direction away from the shaft hole 111 to allow fixing. As the nut 2 is gradually screwed in, and the nut 2 continues to rotate, the protrusion 22 will pass over the elastic arm 12, and the elastic arm 12 will no longer be subjected to the pushing force of the protrusion 22. At the same time, the first slot 21 is in a position opposite to the elastic arm 12. The elastic arm 12 recovers its deformation and automatically engages in the first slot 21 to limit the rotation of the nut 2 in the loosening direction. In this way, when the nut 2 is rotated to the tightened position, the nut 2 can achieve the purpose of axially limiting the control seat 3 and the functional structure 4 on the shaft 32. Moreover, the engagement between the elastic arm 12 and the first slot 21 can effectively prevent the nut 2 from loosening after being locked. Under the premise of ensuring the normal use of the handle, there is no need for manual bending operation, avoiding assembly problems caused by human operation errors, reducing the required precision for assembly, improving assembly efficiency, and improving the assembly quality and stability of door and window accessories.

[0060] In some embodiments, one of the shaft 32 and the ring body 11 is provided with a second slot 321, and the other is provided with a snap-fit ​​arm 13, which snaps into the second slot 321 to form a stable connection between the shaft 32 and the ring body 11.

[0061] In one embodiment, a second retaining groove 321 is recessed on the outer peripheral sidewall of the shaft 32, and a retaining arm 13 is provided on the circumferential inner wall of the ring body 11 to engage with the second retaining groove 321; the end face of the shaft 32 away from the seat body 31 is designated as the outer end face, and the second retaining groove 321 extends to the outer end face of the shaft 32. During assembly, the operator can directly sleeve the ring body 11 onto the shaft 32 along its axial direction. During the sleeve installation process, the retaining arm 13 on the ring body 11 will naturally engage with the second retaining groove 321 of the shaft 32 to restrict the relative rotation between the ring body 11 and the shaft 32, achieving rapid engagement between the ring body 11 and the shaft 32. This rapid engagement mechanism further improves assembly efficiency, making the assembly of the handle faster and more convenient, eliminating the need for complex alignment or rotation operations. This direct sleeve installation method greatly simplifies the assembly process and reduces assembly time and labor costs.

[0062] In one embodiment, two second slots 321 are provided, and two corresponding snap-fit ​​arms 13 can also be provided. Each snap-fit ​​arm 13 snaps into one second slot 321, which can disperse the force at the snap-fit ​​structure and prevent damage to the snap-fit ​​structure. In another specific embodiment, the two second slots 321 can be symmetrically arranged with respect to the axis of the shaft 32, and the two snap-fit ​​arms 13 are symmetrically arranged on the ring body 11. Firstly, the structure is simple and easy to manufacture; secondly, the force at the snap-fit ​​structure is better dispersed.

[0063] In some other embodiments, the second slot 321 can be disposed on the ring body 11, and the snap-fit ​​arm 13 can be disposed on the outer peripheral sidewall of the shaft body 32. The choice can be made according to actual needs, and no single limitation is made here.

[0064] In one embodiment, the handle also includes a handle seat 5, and the seat body 31 of the control seat 3 is disposed on the handle seat 5.

[0065] In one embodiment, a connecting sleeve 51 for the shaft 32 to pass through is provided in the cavity of the handle seat 5.

[0066] In one embodiment, the functional structure 4 includes an elastic ring 41, which is sleeved on the shaft 32.

[0067] In one embodiment, the functional structure 4 includes a connecting plate 42, which is sleeved on the shaft 32, and the connecting plate 42 is provided with a hole 421 for the lock rod of the lock cylinder to pass through.

[0068] In one embodiment, the connecting plate 42 is provided with a slot 422, and the peripheral sidewall of the shaft 32 is inserted into the slot 422.

[0069] In one embodiment, the slot 422 is arc-shaped to fit the peripheral sidewall of the shaft 32.

[0070] It should be noted that in some other embodiments, the functional structure may also include other components for transmission with the lock cylinder, which can be set according to actual needs.

[0071] It should be noted that the connection structure of Embodiment 1 of this application can be specifically applied to the handle in Embodiment 2 above, but it can also be specifically applied to other application scenarios, as long as there is an application scenario that uses the fixing nut 2, such as locking and fixing doors and windows or sliding guide rails and guide wheels on doors and windows by the fixing nut 2.

[0072] In summary, the connection structure and handle disclosed in this utility model can bring at least the following beneficial technical effects:

[0073] (1) As the fixing nut 2 is tightened, the protrusion 22 will pass over the elastic arm 12, and the elastic arm 12 will no longer be pushed by the protrusion 22. At the same time, the first slot 21 is in a position opposite to the elastic arm 12. The elastic arm 12 restores its deformation and automatically engages in the first slot 21 to limit the rotation of the fixing nut 2 in the loosening direction. No manual bending operation is required, thus avoiding assembly problems caused by human operation errors.

[0074] (2) The inclined elastic arm 12 structure provides guidance for the tightening of the fixing nut 2. The inclined surface allows the fixing nut 2 to push the second elastic arm 122 more smoothly, so that it deforms in a direction away from the shaft hole 111, reducing the resistance during the tightening process.

[0075] (3) After the protrusion 22 passes the second elastic arm 122, the bending design of the second elastic arm 122 relative to the first elastic arm 121 enables the second elastic arm 122 to be stably and reliably automatically engaged in the first slot 21.

[0076] (4) The design of the arc transition section 1221 enables the second elastic arm 122 to deform more smoothly when subjected to force. The arc transition section 1221 can better adapt to the stress changes during the deformation process and reduce the risk of damage to the elastic arm 12 due to stress concentration.

[0077] (5) The presence of the cantilever 123 increases the overall length and deformable space of the elastic arm 12, allowing the first elastic arm 121 to undergo elastic deformation over a larger range. This means that during the tightening of the fixing nut 2, the elastic arm 12 can more flexibly adapt to the positional changes and tightening force of the fixing nut 2, ensuring that the second elastic arm 122 can be smoothly inserted into the first slot 21.

[0078] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A connecting structure for a shaft body (32) of a door and window fitting, characterized in that, The connection structure includes: A snap-fit ​​ring (1) includes a ring body (11) and an elastic arm (12); the ring body (11) is used to be sleeved on the shaft (32), the ring body (11) has a shaft hole (111), and the elastic arm (12) is connected to the ring body (11). In the axial direction of the shaft hole (111), the elastic arm (12) is located in front of the ring body (11); A fixing nut (2) is used to screw onto the shaft (32). The outer peripheral sidewall of the fixing nut (2) is provided with a first groove (21) and a protrusion (22). When the fixing nut (2) rotates in the tightening direction, the protrusion (22) can push against the elastic arm (12) so that the elastic arm (12) deforms away from the shaft hole (111). After the protrusion (22) passes the elastic arm (12), the elastic arm (12) returns to its original shape and is locked in the first groove (21) to restrict the rotation of the fixing nut (2) in the loosening direction.

2. The connection structure according to claim 1, characterized in that The outer peripheral sidewall of the ring body (11) is provided with a plurality of elastic arms (12), and the outer peripheral sidewall of the fixing nut (2) is provided with a plurality of first slots (21).

3. The connection structure according to claim 2, characterized in that The number of the first slots (21) is greater than the number of the elastic arms (12).

4. The connection structure according to any one of claims 1 to 3, characterized in that The elastic arm (12) includes a first elastic arm (121) and a second elastic arm (122). The first elastic arm (121) is connected to the ring body (11), and the second elastic arm (122) is connected to the first elastic arm (121). In the axial direction of the shaft hole (111), both the first elastic arm (121) and the second elastic arm (122) are located in front of the ring body (11), and the first elastic arm (121) and the second elastic arm (122) are arranged sequentially along the circumference of the ring body (11). The elastic arm (12) is inclined in a direction away from the shaft hole (111), and the second elastic arm (122) is bent relative to the first elastic arm (121) in a direction closer to the shaft hole (111). When the fixing nut (2) rotates in the tightening direction, the protrusion (22) can push against the second elastic arm (122) so that the second elastic arm (122) deforms away from the shaft hole (111). After the protrusion (22) passes the second elastic arm (122), the second elastic arm (122) returns to its original shape and is engaged in the first slot (21) to restrict the rotation of the fixing nut (2) in the loosening direction.

5. The connection structure according to claim 4, characterized in that The elastic arm (12) further includes a cantilever (123), which protrudes from the outer peripheral sidewall of the ring body (11), and the first elastic arm (121) is connected to the cantilever (123).

6. The connection structure according to claim 4, wherein The second elastic arm (122) has a relief portion and a pressure portion. In the axial direction of the shaft hole (111), the ring body (11), the pressure portion and the relief portion are arranged in sequence. The relief portion is located outside the outermost rotation trajectory of the protrusion (22), and the pressure portion is located inside the outermost rotation trajectory of the protrusion (22).

7. The connection structure according to claim 4, wherein The included angle between the first elastic arm (121) and the second elastic arm (122) is an obtuse angle.

8. The connection structure according to any one of claims 1 or 2 or 3 or 5 or 6 or 7, characterized in that, The snap ring (1) is integrally made of a spring sheet.

9. A handle characterized by The handle includes the connection structure as described in any one of claims 1-8, and further includes a control seat (3) and a functional structure (4). The control seat (3) is used to connect the locking rod of the lock cylinder. The control seat (3) includes a seat body and a shaft (32). The shaft (32) is connected to the seat body. The functional structure (4) is disposed on the shaft (32). The ring body (11) is sleeved on the shaft (32) through the shaft hole (111). The fixing nut (2) is screwed onto the shaft (32). After the fixing nut (2) is tightened, the control seat (3) and the functional structure (4) are positioned at the upper limit of the axial direction of the shaft (32).

10. The handle of claim 9, wherein One of the shaft (32) and the ring body (11) is provided with a second slot (321), and the other is provided with a snap-fit ​​arm (13), which snaps into the second slot (321).

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