Connecting structure and handle comprising same

Abstract

The invention discloses a connecting structure and a handle comprising the same. The connecting structure is used for a shaft body of a door and window accessory and comprises a clamping ring, a connecting piece and a connecting piece, the ring body is used for sleeving a shaft body, a shaft hole is formed in the ring body, the elastic arm is connected to the ring body, and the elastic arm is located in front of the ring body in the axis direction of the shaft hole; the fixing nut is used for being in threaded connection with the shaft body, and a first clamping groove and a protrusion are arranged on the side wall of the periphery of the fixing nut; when the fixing nut rotates in the screwing direction, the protrusion can abut against the elastic arm so that the elastic arm can deform in the direction away from the shaft hole, after the protrusion crosses the elastic arm, the elastic arm can recover deformation under the elastic force effect of the elastic arm so as to be automatically clamped in the first clamping groove in the fixing nut, and therefore rotation of the fixing nut in the unscrewing direction can be limited; on the premise that normal use of the handle is guaranteed, manual bending operation is not needed, the assembling problem caused by manual operation errors is avoided, and the assembling quality of door and window accessories is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of door and window hardware accessories, and particularly relates to a connecting structure and a handle comprising the same. Background Art

[0002] The handle in the prior art usually includes a lock cylinder opening control component, a panel cover and a connecting sleeve, wherein the lock cylinder opening control component is provided with a retaining spring, which is located on the outside of the panel cover and abuts against the outer end surface of the panel cover, and the lock cylinder opening control component includes a lock cylinder body and a shaft sleeve sleeved on the lock cylinder body, an end of the shaft sleeve away from the panel cover is provided with a connecting seat, the connecting seat is fixedly connected to the handle body, and the other end of the shaft sleeve is connected to the panel cover and the connecting sleeve, and the retaining spring is arranged in a connecting groove on the shaft sleeve, so that the connecting sleeve and the panel cover are confined between the connecting seat and the retaining spring, and the retaining spring is fixed to the handle body. The spring limits 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 this prior art, it is found that the assembly accuracy of the above structure is extremely high. For example, the spacing between the connecting groove on the sleeve and the outer end face of the panel cover has high assembly accuracy. If the spacing is too large, it is extremely easy to cause the handle to loosen; or, if the spacing is too small, the retaining spring cannot be assembled. There is room for improvement.

[0003] In order to solve the above problems, Chinese patent publication number CN118686484A discloses a connection structure of a handle and a fixing nut, the handle includes: a handle body, a lock core body, a sleeve sleeved on the lock core body and a panel cover, the panel cover is provided with an assembly hole; the sleeve is passed through the assembly hole of the panel cover and is threadedly connected to the fixing nut, a clamping ring is provided between the fixing nut and the panel cover, and the clamping ring is sleeved on the sleeve; the clamping ring is clamped with the sleeve and has a first clamping block that can be bent, and the fixing nut is provided with multiple first clamping grooves at intervals; when the fixing nut is tightened, the first clamping block is bent and clamped into any one of the first clamping grooves on the fixing nut. On the premise of ensuring the normal use of the handle, it reduces the precision required for assembly to improve assembly efficiency. At the same time, the clamping ring can effectively prevent the fixing nut from loosening after being locked. However, in the actual assembly of the handle of the prior art, after the fixing nut is tightened, the first clamping block needs to be manually bent to clamp the first clamping block into the first clamping groove, which makes the assembly more inconvenient. In addition, the first clamping block may not be bent into the first clamping groove due to misoperation, thereby affecting the assembly quality and efficiency of the handle. Summary of the Invention

[0004] In order to overcome at least one of the defects described in the above-mentioned prior art, the present invention provides a connecting structure and a handle including the same, so as to solve the problems of high assembly precision requirements, inconvenience in assembly and possible assembly errors in the prior art for door and window accessories. On the premise of ensuring the normal use of door and window accessories, the precision required for assembly is reduced, the assembly efficiency is improved, and the loosening of the connecting parts is effectively prevented.

[0005] The technical solution adopted by the present invention to solve the problem is: A connecting structure for the shaft of door and window accessories, the connecting structure comprising: a snap ring, the snap ring comprising a ring body and an elastic arm; the ring body is used to be sleeved on the shaft, the ring body is provided with an axial hole, the elastic arm is connected to the ring body, and in the axial direction of the axial hole, the elastic arm is located in front of the ring body; a fixing nut is used to be screwed to the shaft, and the outer peripheral side wall of the fixing nut is provided with a first clamping groove and a protrusion; when the fixing nut is rotated in the tightening direction, the protrusion can push the elastic arm to cause the elastic arm to deform in the direction away from the axial hole, and when the protrusion passes over the elastic arm, the elastic arm recovers its deformation and is clamped in the first clamping groove to limit the rotation of the fixing nut in the loosening direction.

[0006] According to some embodiments of the present invention, the outer peripheral side wall of the ring body is provided with a plurality of the elastic arms, and the outer peripheral side wall of the fixing nut is provided with a plurality of the first clamping grooves.

[0007] According to some embodiments of the present invention, the number of the first slots is greater than the number of the elastic arms.

[0008] According to some embodiments of the present invention, 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, the first elastic arm and the second elastic arm are both located in front of the ring body, and the first elastic arm and the second elastic arm are arranged in sequence along the circumference of the ring body, the elastic arm is inclined in the direction away from the shaft hole, and the second elastic arm is bent in the direction close to the shaft hole relative to the first elastic arm; when the fixing nut is rotated in the tightening direction, the protrusion can push the second elastic arm so that the second elastic arm is deformed in the direction away from the shaft hole, and when the protrusion passes over the second elastic arm, the second elastic arm restores its deformation and is engaged in the first slot to limit the rotation of the fixing nut in the loosening direction.

[0009] According to some embodiments of the present invention, the elastic arm further includes a cantilever, the cantilever is protruded from the outer peripheral side wall of the ring body, and the first elastic arm is connected to the cantilever.

[0010] According to some embodiments of the present invention, the second elastic arm has a yielding portion and a pressure portion, and in the axial direction of the shaft hole, the ring body, the pressure portion and the yielding portion are arranged in sequence, the yielding portion is located outside the outermost rotation trajectory of the protrusion, and the pressure portion is located inside the outermost rotation trajectory of the protrusion.

[0011] According to some embodiments of the present invention, the projection of the first elastic arm toward the axial direction of the shaft hole is defined as a first projection, and the projection of the fixing nut toward the axial direction of the shaft hole is defined as a second projection, and the outermost contour of the first projection is located outside the outermost contour of the second projection.

[0012] According to some embodiments of the present invention, the angle between the first elastic arm and the second elastic arm is an obtuse angle.

[0013] According to some embodiments of the present invention, the snap ring is made of an integral elastic piece.

[0014] In addition, the present invention also provides a handle, which includes the connection structure described in any one of the above embodiments, and also includes a control seat and a functional structure. The control seat is used to connect the lock rod of the lock cylinder. The control seat includes a seat body and a shaft body. The shaft body is connected to the seat body, and the functional structure is arranged on the shaft body. The ring body is sleeved on the shaft body through the axial hole, and the fixing nut is threaded on the shaft body. After the fixing nut is tightened, the control seat and the functional structure are positioned at the axial upper limit of the shaft body.

[0015] 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 one is provided with a connecting arm, and the connecting arm is connected to the second slot.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The elastic arm has a certain elasticity and can be deformed when subjected to external force and return to its original shape after the external force disappears. During assembly, the ring body can be first sleeved on the shaft of the door and window accessories, and then the fixing nut can be screwed into the shaft. When the fixing nut is rotated in the tightening direction, the protrusion will gradually push the elastic arm. Due to the elasticity of the elastic arm, under the pushing action of the protrusion, the elastic arm will be deformed in the direction away from the shaft hole to allow the fixing nut to be gradually screwed in. As the fixing nut continues to rotate, the protrusion will pass over the elastic arm, and the elastic arm will no longer be subjected to the pushing force of the protrusion. At the same time, the first slot is in contact with the elastic arm. When the handle is in a relatively fixed position, the elastic arm recovers its deformation and automatically engages in the first engaging groove to limit the rotation of the fixing nut in the loosening direction. In this way, when the fixing nut is rotated to achieve tightening, the fixing nut can limit the axial position of the parts of the door and window accessories on the shaft body, and the engagement between the elastic arm and the first engaging groove can effectively prevent the fixing nut from loosening after being locked. Under the premise of ensuring the normal use of the handle, no manual bending operation is required, which avoids assembly problems caused by human operational errors, reduces the precision required for assembly, thereby improving assembly efficiency, and improving the assembly quality and stability of door and window accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of the handle of an embodiment of the present application; Figure 2 2 is a front view structural diagram of a handle according to an embodiment of the present application; Figure 3 This is a schematic diagram of the exploded structure of the handle of an embodiment of the present application; Figure 4 This is a front view structural diagram of the connection structure of an embodiment of the present application; Figure 5 It is a schematic diagram of the exploded structure of the connection structure of an embodiment of the present application.

[0019] Description of main reference numerals: 1. Snap ring; 11. Ring body; 111. Axis hole; 12. Elastic arm; 121. First elastic arm; 122. Second elastic arm; 1221. Arc-shaped transition section; 1222. Free end; 123. Cantilever; 13. Snap arm; 2. Fixing nut; 21. First slot; 22. Protrusion; 3. Control seat; 31. Seat body; 32. Axis body; 321. Second slot; 4. Functional structure; 41. Elastic ring; 42. Connecting plate; 421. Hole position; 422. Slot; 5. Handle seat; 51. Connecting sleeve. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] In the present invention, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe the present invention and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0022] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0023] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0024] Furthermore, the terms "first," "second," and the like are primarily used to distinguish different devices, elements, or components (which may or may not be the same in type and configuration) and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0025] The technical solution of the present invention will be further described below in conjunction with embodiments and drawings.

[0026] Example 1 See also Figures 1 to 5 The embodiment of the present application provides a connection structure, which is used for the shaft body 32 of door and window accessories, and the connection structure includes a clamping ring 1 and a fixing nut 2; the clamping ring 1 includes a ring body 11 and an elastic arm 12; the ring body 11 is used to be sleeved on the shaft body 32, and the ring body 11 is provided with an axial hole 111, and the elastic arm 12 is connected to the ring body 11, and in the axial direction of the axial hole 111, the elastic arm 12 is located in front of the ring body 11; the fixing nut 2 is used to be screwed to the shaft body 32, and the outer peripheral side wall of the fixing nut 2 is provided with a first clamping groove 21 and a protrusion 22; when the fixing nut 2 is rotated in the tightening direction, the protrusion 22 can push the elastic arm 12 so that the elastic arm 12 is deformed in the direction away from the axial hole 111. After the protrusion 22 passes over the elastic arm 12, the elastic arm 12 recovers its deformation and is clamped in the first clamping groove 21 to limit the rotation of the fixing nut 2 in the loosening direction.

[0027] It should be noted that, given the extremely high assembly precision required for conventional handles using a retaining spring and sleeve for position control, during the development of this handle, the threaded engagement between the retaining nut 2 and the shaft 32 was specifically chosen to effectively reduce the required assembly precision. However, during multiple development tests, it was discovered that the retaining nut 2 was prone to loosening after prolonged use. Therefore, a retaining ring 1 was interposed between the shaft 32 and the retaining nut 2 to prevent it from loosening after tightening.

[0028] The embodiment of the present application provides a connection structure in which the elastic arm 12 has a certain elasticity and can be deformed when subjected to an external force and return to its original shape after the external force disappears. During assembly, the ring body 11 can be first sleeved on the shaft body 32 of the door and window accessory, and then the fixing nut 2 can be screwed into the shaft body 32. When the fixing nut 2 rotates in the tightening direction, the protrusion 22 will gradually push the elastic arm 12. Since the elastic arm 12 has elasticity, under the pushing action of the protrusion 22, the elastic arm 12 will be deformed in the direction away from the shaft hole 111 to allow the fixing nut 2 to be gradually screwed in. As the fixing nut 2 continues to rotate, the protrusion 22 will pass over the elastic arm 12, and the elastic arm 12 will no longer be affected by the protrusion 22. The first engaging groove 21 is in a position opposite to the elastic arm 12, and the elastic arm 12 recovers its deformation and automatically engages in the first engaging groove 21 to limit the rotation of the fixing nut 2 in the loosening direction. In this way, when the fixing nut 2 is rotated to the tightening position, the fixing nut 2 can limit the axial position of the parts of the door and window accessories on the shaft body 32, and the engagement between the elastic arm 12 and the first engaging groove 21 can effectively prevent the fixing 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, which avoids assembly problems caused by human operational errors, reduces the precision required for assembly, improves assembly efficiency, and improves the assembly quality and stability of door and window accessories.

[0029] 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.

[0030] In one embodiment, the ring body 11 is sleeved on the shaft body 32 and then fixed relative to the shaft body 32 .

[0031] 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 engaging grooves 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 engaging grooves 21 and a plurality of elastic arms 12, when the fixing nut 2 is tightened into place, an elastic arm 12 and a first engaging groove 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 engaging grooves 21 on the fixing nut 2 and the elastic arms 12 on the ring body 11, thereby reducing manufacturing costs. It is understandable that the connection structure in the prior art needs to bend the first clamping block after tightening the fixing nut so that the first clamping block is clamped into the first clamping groove. However, the specific installation position of the fixing nut after tightening is uncertain, and which first clamping block needs to be bent after tightening the fixing nut is also uncertain. In this way, when tightening the fixing nut, it is still necessary to manually observe the specific installation position after tightening the fixing nut and bend the appropriate first clamping block to clamp it into the first clamping groove. It is always necessary to manually rotate the fixing nut and bend the first clamping block, which makes it difficult to achieve an automated installation operation of tightening the fixing nut. In the connection structure of the embodiment, no matter what installation position the fixing nut 2 is in after being tightened, at least one elastic arm 12 recovers its deformation and automatically engages in the first engaging groove 21 to limit the rotation of the fixing nut 2 in the loosening direction. There is no need to manually observe the specific installation position of the fixing nut 2 after tightening, and there is no need to manually intervene in the engagement between the elastic arm 12 and the first engaging groove 21, so there is no need to tighten the fixing nut 2 through manual operation. In this way, the tightening operation of the fixing nut 2 can be achieved by automated equipment, thereby realizing assembly automation. For example, the automated equipment can be a fully automated nut machine.

[0032] like Figure 3 、 Figure 4 and Figure 5 As shown, in one embodiment, a plurality of first slots 21 may be evenly distributed on the outer peripheral side wall of the fixing nut 2, and a plurality of elastic arms 12 may be evenly distributed on the outer peripheral side wall of the ring body 11 to further improve the assembly efficiency of the snap-in.

[0033] like Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, in one embodiment, a plurality of protrusions 22 are provided on the outer peripheral side wall of the fixing nut 2, so that the plurality of protrusions 22 can fully push the plurality of elastic arms 12, thereby realizing reliable rotation of the fixing nut 2 along the tightening direction.

[0034] In one embodiment, the ring body 11 and the elastic arm 12 can be integrally formed, such as by injection molding or integral bending molding.

[0035] In one embodiment, the ring body 11 and the elastic member can be connected by welding, but is not limited to welding. The connection can be selected according to actual needs and is not limited here.

[0036] like Figure 3 、 Figure 4 and Figure 5 As shown, in one embodiment, the number of the first engaging slots 21 is greater than the number of the elastic arms 12. Since it has been found in actual experiments that, in fact, as long as one elastic arm 12 is engaged in one first engaging slot 21, it is possible to effectively prevent the fixing nut 2 from loosening after being tightened, when the fixing nut 2 is screwed into place, it is not necessary to engage multiple elastic arms 12 with multiple first engaging slots 21 in a one-to-one correspondence. At the same time, in order to improve the assembly efficiency of the engagement, the number of the first engaging slots 21 needs to be greater than the number of the elastic arms 12 so that the elastic arms 12 can more quickly find the nearest first engaging slot 21 that can be engaged.

[0037] It is understandable that when tightening the fixing nut 2, if multiple elastic arms 12 are respectively engaged with multiple first slots, the simultaneous force exerted on multiple locations will generate greater friction and resistance, thereby affecting the rotation of the fixing nut 2. In order to solve the above problem, in one embodiment, please refer to Figure 4 When one elastic arm 12 is inserted into a first slot 21, the other elastic arms 12 and the other first slots 21 will be staggered. In this way, the superposition of resistance caused by multiple simultaneous engagements is avoided, thereby reducing the resistance encountered during the tightening of the fixing nut 2, allowing the operator to complete the tightening operation more easily. This advantage is more obvious, especially in some scenarios with small space or inconvenient operation. In addition, smaller resistance means that the friction between the elastic arm 12 and the first slot 21 is reduced, which reduces the wear of the components during the tightening process and extends the service life of the components.

[0038] like Figure 3 、 Figure 4 and Figure 5 As shown, in one embodiment, the number of the first card slots 21 is 12, and the number of the elastic arms 12 is 7. This arrangement can ensure the effect of card-in assembly while also ensuring structural strength.

[0039] It should be noted that, in some other embodiments, the elastic arm 12 may also be provided on a side of the ring body 11 facing the fixing nut 2 .

[0040] It should be noted that, in some other embodiments, the number of the first slots 21 may be less than or equal to the number of the elastic arms 12 , which can be selected according to actual needs and is not limited here.

[0041] 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, the first elastic arm 121 and the second elastic arm 122 are both located in front of the ring body 11, and the first elastic arm 121 and the second elastic arm 122 are arranged in sequence along the circumference of the ring body 11, and the elastic arm 12 is inclined in the direction away from the shaft hole 111, and the second elastic arm 122 is bent relative to the first elastic arm 121 in the direction close to the shaft hole 111; when the fixing nut 2 is rotated in the tightening direction, the protrusion 22 can push the second elastic arm 122 so that the second elastic arm 122 is deformed in the direction away from the shaft hole 111. After the protrusion 22 passes over the second elastic arm 122, the second elastic arm 122 recovers its deformation and automatically engages in the first slot 21 to limit the rotation of the fixing nut 2 in the loosening direction. With such arrangement, on the one hand, the first elastic arm 121 and the second elastic arm 122 are both inclined in the direction away from the shaft hole 111, and the second elastic arm 122 is bent relative to the first elastic arm 121 in the direction close to the shaft hole 111. This inclination and bending design plays an important role when the fixing nut 2 rotates in the tightening direction. When the protrusion 22 pushes the second elastic arm 122, the inclined elastic arm 12 structure provides a guide for the tightening of the fixing nut 2. The inclined surface enables the fixing nut 2 to push the second elastic arm 122 more smoothly, causing it to deform in the direction away from the shaft hole 111, reducing the resistance during the tightening process, reducing the force required by the operator, avoiding wear of parts caused by sudden collisions or jams, and improving the convenience and efficiency of assembly. After the protrusion 22 passes over 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; secondly, when the fixing nut 2 is tightened, the second elastic arm 122 recovers its deformation to automatically engage in the first slot 21, and the existence 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 enables the second elastic arm 122 to obtain more stable support when engaged, thereby enhancing the firmness of the engagement. Even if subjected to a large external force, the second elastic arm 122 is not easy to disengage from the first slot 21, thereby effectively limiting the rotation of the fixing nut 2 in the loosening direction, thereby ensuring the long-term stability of the connection structure.

[0042] like Figure 3 、 Figure 4 and Figure 5As shown, in one embodiment, the second elastic arm 122 includes an arcuate transition section 1221 and a free end 1222, the arcuate transition section 1221 is connected between the first elastic arm 121 and the free end 1222, the free end 1222 is arranged away from the first elastic arm 121, the first elastic arm 121, the arcuate transition section 1221 and the free end 1222 are arranged around the shaft hole 111 in sequence, and after the fixing nut 2 is tightened, the free end 1222 is snapped into the first slot 21. In this way, on the first aspect, the design of the arc-shaped transition section 1221 enables the second elastic arm 122 to deform more smoothly when subjected to force. Compared with a straight line segment or a transition of other shapes, the arc-shaped transition section 1221 can better adapt to stress changes during the deformation process, and reduce the risk of damage to the elastic arm 12 due to stress concentration. When the fixing nut 2 is tightened and pushes 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. The second aspect is that the free end 1222 is set away from the first elastic arm 121, so that the second elastic arm 122 can be more accurately clamped into the first clamping groove 21 after recovering the 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 first clamping groove 21 position and fit tightly with the inner wall of the first clamping groove 21. This precise clamping method improves the reliability of the clamping and prevents the fixing nut 2 from loosening during use. Moreover, once the free end 1222 of the second elastic arm 122 is clamped into the first clamping groove 21, the structure of the arc-shaped transition section 1221 and the free end 1222 can provide a stable clamping force. The elastic characteristics of the arc-shaped transition section 1221 enable the clamping part to maintain a certain elastic buffer when subjected to external force, reducing the risk of clamping failure caused by vibration or impact. At the same time, the close fit between the free end 1222 and the first clamping groove 21 also enhances the stability of the clamping, ensuring that the connection structure can work reliably under various working conditions.

[0043] like Figure 3 、 Figure 4 and Figure 5As shown, in one embodiment, the elastic arm 12 further includes a cantilever 123, which is protruding from the outer peripheral side wall of the ring body 11, and the first elastic arm 121 is connected to the cantilever 123. With such a configuration, on the one hand, the presence of the cantilever 123 increases the overall length and deformable space of the elastic arm 12, so that the first elastic arm 121 can undergo elastic deformation within a larger range, which means that during the tightening process of the fixing nut 2, the elastic arm 12 can more flexibly adapt to the position change of the fixing nut 2 and the magnitude of the tightening force, ensuring that the second elastic arm 122 can be smoothly inserted into the first slot 21. At the same time, during the use of the connection structure, the larger elastic deformation range can also better cope with various complex stress conditions, thereby improving the adaptability and stability of the connection structure. Secondly, the cantilever 123 is protruded from the outer peripheral side wall of the ring body 11, which is equivalent to adding an additional elastic structure to the first elastic arm 121. When the fixing nut 2 is tightened to push the second elastic arm 122 or the connecting structure is subjected to external force, the cantilever 123 can undergo elastic deformation, absorb part of the energy, and play a buffering role. This elastic buffering can reduce the damage to the elastic arm 12 and the fixing nut 2 caused by sudden external force impact, thereby extending the service life of the components.

[0044] See also Figure 4 and Figure 5 The second elastic arm 122 has a yielding portion and a pressure-bearing portion. In the axial direction of the shaft hole 111, the ring body 11, the pressure-bearing portion and the yielding portion are arranged in sequence. The yielding portion is outside the outermost rotation trajectory of the protrusion 22, and the pressure-bearing portion is inside the outermost rotation trajectory of the protrusion 22. In this way, when the fixing nut 2 rotates along the tightening direction, the existence of the yielding portion allows the fixing nut 2 to gradually move axially toward the ring body 11 during the rotation process, so that the fixing nut 2 can be smoothly screwed in to achieve tightening, ensuring the feasibility and smoothness of the installation operation of the fixing nut 2. The existence of the pressure-bearing portion is to receive the thrust of the protrusion 22, thereby causing the second elastic arm 122 to elastically deform in the 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 referred to Figure 4 The dotted line in .

[0045] See also Figure 4 and Figure 5, define the projection of the first elastic arm 121 toward the axial direction of the shaft hole 111 as the first projection, and define the projection of the fixing nut 2 toward the axial direction of the shaft hole 111 as the second projection; it is understandable 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 very likely to have spatial conflicts during the rotation process, resulting in mutual interference between the two. In order to avoid the above problems, 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 hinder the movement trajectory of the fixing nut 2, avoiding the jamming and stuck phenomena caused by interference, so that the fixing nut 2 can be tightened smoothly, improving the efficiency and quality of assembly. Furthermore, during the tightening process of the fixing nut 2, the pushing action of the protrusion 22 will cause the second elastic arm 122 to deform in a direction 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 the deformation and accurately snap into the first slot 21. If there is insufficient space, the second elastic arm 122 may not deform normally, resulting in a failed snap connection or a loose snap connection. 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 angle deviation. The larger projection range of the first elastic arm 121 provides a fault tolerance space for this angle deviation. Even if the fixing nut 2 is slightly deflected during tightening, the first elastic arm 121 will not interfere with it, ensuring the flexibility and reliability of the tightening operation. See also Figure 4 In one embodiment, the angle between the first elastic arm 121 and the second elastic arm 122 is an obtuse angle. The obtuse angle design allows the first elastic arm 121 and the second elastic arm 122 to deform more smoothly when subjected to force. Furthermore, the obtuse angle design between the first elastic arm 121 and the second elastic arm 122 allows the second elastic arm 122 to generate a greater clamping force after deformation. When the second elastic arm 122 is inserted into the first clamping slot 21, the obtuse angle structure allows the clamping portion to better fit the inner wall of the clamping slot, increasing the friction force and contact area of ​​the clamping, thereby improving the reliability of the clamping and preventing the fixing nut 2 from loosening during use.

[0046] like Figure 3 and Figure 5 As shown, in one embodiment, in the height direction of the fixing nut 2, the top end of the first clamping groove 21 extends to the top end of the fixing nut 2 and the bottom end extends to the bottom end of the fixing nut 2. This arrangement is equivalent to providing a vertically penetrating clamping groove structure on the outer peripheral side wall of the fixing nut 2. Firstly, the manufacturing cost is low, and secondly, it can facilitate the insertion of the elastic arm 12 into the first clamping groove 21, and the structure is simple and easy to implement.

[0047] In one embodiment, the snap ring 1 is made of a spring sheet in one piece. In a specific embodiment, the snap ring 1 is made of a spring sheet in one piece.

[0048] It should be noted that the elastic arm 12 can also be connected to the ring body 11 by, but not limited to, welding, pinning, or crimping, etc., which can be set according to actual needs and is not limited here.

[0049] Example 2 See also Figure 1 、 Figure 2 and Figure 3 In addition, the embodiment of the present application also provides a handle, which includes the connection structure described in any one of the embodiments of Example 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 body 32. The shaft body 32 is connected to the seat body 31, and the functional structure 4 is arranged on the shaft body 32. The ring body 11 is sleeved on the shaft body 32 through the shaft hole 111, and the fixing nut 2 is screwed on the shaft body 32. After the fixing nut 2 is tightened, the control seat 3 and the functional structure 4 are positioned in the axial upper limit of the shaft body 32. Specifically, when the fixing nut 2 is rotated in the tightening direction, the protrusion 22 will gradually push 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 the direction away from the shaft hole 111 to allow fixation. The nut 2 is gradually screwed in, and as the fixing nut 2 continues to rotate, the protrusion 22 will pass over the elastic arm 12, and the elastic arm 12 is no longer subjected to the thrust of the protrusion 22. At the same time, the first slot 21 is in a position opposite to 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 is rotated to the tightening position, the fixing nut 2 can achieve the purpose of axially limiting the control seat 3 and the functional structure 4 on the shaft 32, and 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 the normal use of the handle, no manual bending operation is required, which avoids assembly problems caused by human operational errors, reduces the precision required for assembly, improves assembly efficiency, and improves the assembly quality and stability of door and window accessories.

[0050] 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 clamping arm 13 , which is clamped in the second slot 321 to form a stable connection between the shaft 32 and the ring body 11 .

[0051] In one embodiment, a second retaining groove 321 is recessed into the outer peripheral sidewall of the shaft body 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 body 32 away from the seat body 31 is defined as the outer end face, and the second retaining groove 321 extends to the outer end face of the shaft body 32. During assembly, the operator can directly sleeve the ring body 11 onto the shaft body 32 along the axial direction of the shaft body 32. During the sleeve installation of the ring body 11, the retaining arm 13 thereon will naturally engage with the second retaining groove 321 of the shaft body 32 to limit relative rotation between the ring body 11 and the shaft body 32, thereby achieving a quick engagement of the ring body 11 and the shaft body 32. This quick engagement mechanism further improves assembly efficiency, making the handle assembly faster and more convenient, without the need for complex alignment or rotation operations. This direct sleeve installation method greatly simplifies the assembly process, reducing assembly time and labor costs.

[0052] In one embodiment, two second engaging slots 321 are provided, and two corresponding engaging arms 13 are also provided. Each engaging arm 13 engages within each second engaging slot 321, distributing the forces acting on the engaging structure and preventing damage to the engaging structure. In another specific embodiment, the two second engaging slots 321 are symmetrically arranged relative to the axis of the shaft body 32, and the two engaging arms 13 are symmetrically arranged on the ring body 11. This simplifies the structure and facilitates manufacturing; it also effectively distributes the forces acting on the engaging structure.

[0053] In some other embodiments, the second slot 321 can be provided on the ring body 11 , and the clamping arm 13 can be correspondingly provided on the outer peripheral side wall of the shaft body 32 . The selection can be made according to actual needs and is not limited here.

[0054] In one embodiment, the handle further includes a handle base 5 , and the base body 31 of the control base 3 is disposed on the handle base 5 .

[0055] In one embodiment, a connecting sleeve 51 for the shaft 32 to pass through is provided in the cavity of the handle base 5 .

[0056] In one embodiment, the functional structure 4 includes an elastic ring 41 , which is sleeved on the shaft 32 .

[0057] In one embodiment, the functional structure 4 includes a connecting plate 42 , which is sleeved on the shaft body 32 . The connecting plate 42 is provided with a hole 421 for the lock rod of the lock core to pass through.

[0058] In one embodiment, a slot 422 is provided on the connecting plate 42 , and the peripheral side wall of the shaft body 32 is inserted into the slot 422 .

[0059] In one embodiment, the slot 422 is arc-shaped to fit the peripheral side wall of the shaft body 32 .

[0060] 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 configured according to actual needs.

[0061] It should be noted that the connection structure of embodiment 1 of the present application can be specifically applied to the handle in the above-mentioned embodiment 2, but can also be specifically applied to other application scenarios, as long as there is an application scenario where the fixing nut 2 is used, for example, doors and windows that are locked and fixed by the fixing nut 2, or sliding guide rails and guide wheels on the doors and windows.

[0062] In summary, the connection structure and handle including the same disclosed in the present invention can at least bring the following beneficial technical effects: (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 subject to the thrust of the protrusion 22. At the same time, the first clamping groove 21 is in a position opposite to the elastic arm 12. The elastic arm 12 recovers its deformation and automatically engages in the first clamping groove 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 operational errors. (2) The inclined elastic arm 12 structure provides a guide for tightening the fixing nut 2. The inclined surface enables the fixing nut 2 to push the second elastic arm 122 more smoothly, causing it to deform in a direction away from the shaft hole 111, thereby reducing the resistance during the tightening process; (3) After the protrusion 22 passes over 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; (4) The design of the arc-shaped transition section 1221 enables the second elastic arm 122 to deform more smoothly when subjected to force. The arc-shaped transition section 1221 can better adapt to stress changes during the deformation process and reduce the risk of damage to the elastic arm 12 due to stress concentration; (5) The existence of the cantilever 123 increases the overall length and deformable space of the elastic arm 12, so that the first elastic arm 121 can be elastically deformed in a larger range. This means that during the tightening process of the fixing nut 2, the elastic arm 12 can more flexibly adapt to the position change of the fixing nut 2 and the size of the tightening force, ensuring that the second elastic arm 122 can be smoothly inserted into the first slot 21.

[0063] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A connecting structure for a shaft body (32) of a door and window accessory, characterized in that: The connection structure includes: A snap ring (1), comprising a ring body (11) and an elastic arm (12); the ring body (11) is used to be sleeved on a shaft body (32); the ring body (11) is provided with an axial hole (111); the elastic arm (12) is connected to the ring body (11); in the axial direction of the axial hole (111), the elastic arm (12) is located in front of the ring body (11); A fixing nut (2) is used for being screwed to a shaft (32), and a first clamping groove (21) and a protrusion (22) are provided on the outer peripheral side wall of the fixing nut (2); when the fixing nut (2) is rotated in the tightening direction, the protrusion (22) can push the elastic arm (12) so that the elastic arm (12) is deformed in a direction away from the shaft hole (111); after the protrusion (22) passes over the elastic arm (12), the elastic arm (12) recovers its deformation and is clamped in the first clamping groove (21) to limit 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 side wall of the ring body (11) is provided with a plurality of elastic arms (12), and the outer peripheral side wall of the fixing nut (2) is provided with a plurality of first clamping grooves (21).

3. The connection structure according to claim 2, characterized in that: The number of the first card 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), the first elastic arm (121) and the second elastic arm (122) are both located in front of the ring body (11), and the first elastic arm (121) and the second elastic arm (122) are arranged in sequence 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 close to the shaft hole (111); When the fixing nut (2) is rotated in the tightening direction, the protrusion (22) can push the second elastic arm (122) so that the second elastic arm (122) is deformed 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) recovers its deformation and is engaged in the first slot (21) to limit 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), the cantilever (123) being protruding from the outer peripheral side wall of the ring body (11), and the first elastic arm (121) being connected to the cantilever (123).

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

7. The connection structure according to claim 4, characterized in that: The 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 made of an integral elastic piece.

9. The handle is characterized by: The handle includes a connection structure as described in any one of claims 1 to 8, 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 core, the control seat (3) includes a seat body and a shaft body (32), the shaft body (32) is connected to the seat body, the functional structure (4) is arranged on the shaft body (32), the ring body (11) is sleeved on the shaft body (32) through the shaft hole (111), the fixing nut (2) is screwed to the shaft body (32), and after the fixing nut (2) is tightened, the control seat (3) and the functional structure (4) are positioned at the axial upper limit of the shaft body (32).

10. The handle according to claim 9, characterized in that: One of the shaft body (32) and the ring body (11) is provided with a second clamping groove (321), and the other is provided with a clamping arm (13), and the clamping arm (13) is clamped in the second clamping groove (321).

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