Anti-loosening door handle
By incorporating a grooved structure and an anti-misinstallation protrusion on the door handle, combined with the hexagonal operating lever and anti-slip groove on the key, the problem of the door handle coming loose is solved, achieving a stable and convenient fastening effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-31
AI Technical Summary
Door handles are prone to loosening after prolonged use, resulting in a poor user experience or inability to open the door. Current technology cannot effectively prevent this loosening phenomenon.
A door handle designed to prevent loosening is provided by setting a groove structure and an anti-misinstallation protrusion structure on the square core to ensure the correct installation direction; at the same time, the hexagonal operating rod is fixed to the key, and the anti-slip groove on the surface of the square core cooperates with the anti-slip strip on the inner wall of the handle hole, generating friction only when the fastening bolt is tightened to prevent loosening.
It effectively avoids the risk of loosening caused by human error, ensures the door handle is secure, and can tighten bolts even in the absence of a special wrench, thus improving the stability and convenience of use.
Smart Images
Figure CN224064088U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a door lock, and more particularly to an anti-loosening door handle. Background Technology
[0002] Door handles are an important component of door lock products, and people use them to open and close doors.
[0003] Currently, door handles frequently become loose after prolonged use. Research has found two main reasons for this: First, installers may assemble the door handle and the core incorrectly, causing the core to be misaligned and the bolts not properly tightened. This results in the handle loosening quickly. Second, frequent use over a long period causes the bolts to loosen, reducing the tightening pressure on the core. Since installers typically don't keep a wrench after installation, users cannot perform maintenance themselves, leading to further loosening over time. Slight loosening affects the user experience and may cause unusual noises. Severe loosening can cause the handle to detach completely from the core, rendering the door impossible to open. Utility Model Content
[0004] To solve the above problems, a special anti-loosening door handle has been developed, which can improve the phenomenon of door handles becoming loose.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a door handle with anti-loosening features a handle body, a square core, and a key. The handle body includes a handle head and a handle portion. The handle head has a handle hole, into which the square core is inserted. The handle head has a square core locking hole on its side, and an internal hexagonal fastening bolt is fitted into the square core locking hole. The key is externally mounted separately. The square core is composed of two symmetrical square bars, each with an arc-shaped recessed structure for engaging the internal hexagonal fastening bolt. The handle hole is a square hole, with anti-misinstallation protrusions on two opposite inner walls. The square core has a groove structure corresponding to the anti-misinstallation protrusions.
[0006] Furthermore, the key includes a key body and a hexagonal operating lever, with the hexagonal operating lever located on top of the key body, and the two are integrated into one piece.
[0007] Furthermore, the groove structure on the square core is composed of two square strips, with the two adjacent long sides of the strips having a chamfered structure. The chamfered structures of the two square strips are joined together to form the groove structure.
[0008] Furthermore, the length of the hexagonal operating lever extends at least 4mm beyond the edge of the key body.
[0009] Furthermore, the inner wall surface of the handle hole is also provided with several anti-slip strips arranged at equal intervals.
[0010] Furthermore, the surface of the square strip is provided with anti-slip grooves corresponding to the anti-slip strips.
[0011] The advantages of this utility model are:
[0012] 1. By setting a groove structure on the square core and setting an anti-misinstallation protrusion structure in the handle hole, installers cannot assemble the door handle in the wrong direction. They can only adjust the direction and assemble it correctly, which completely avoids the potential risk of the door handle coming loose due to human error.
[0013] 2. The hexagonal operating lever is directly fixed to the key body, so that the fastening bolt can be tightened by the key even without a special hexagonal wrench.
[0014] 3. The anti-slip grooves on the surface of the square core can cooperate with the anti-slip strips on the inner wall of the handle hole, and the two will not come into contact during installation. They will only come into contact when the fastening bolts are tightened, generating resistance and preventing them from sliding and loosening. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the explosion state of an anti-loosening door handle according to the present invention.
[0016] Figure 2 This is a schematic diagram of the handle head in an anti-loosening door handle according to the present invention.
[0017] Figure 3 This is a schematic diagram of the handle head in an anti-loosening door handle according to the present invention.
[0018] Figure 4 This is a schematic diagram of the key body in an anti-loosening door handle according to the present invention.
[0019] Attached reference numerals: 1. Anti-slip groove; 2. Groove structure; 3. Square core; 4. Groove structure; 5. Square core fastening hole; 6. Hexagonal internal fastening bolt; 7. Handle head; 8. Key body; 9. Hexagonal operating lever; 10. Handle hole; 11. Anti-misinstallation protrusion structure. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0021] A door handle with anti-loosening features a handle body, a square core, and a key. The handle body includes a handle head and a handle portion. The handle head has a handle hole into which the square core is inserted. A locking hole for the square core is located on the side of the handle head, and an internal hexagonal bolt is fitted into the locking hole. The key is externally mounted separately. The square core consists of two symmetrical square bars, each with an arc-shaped recessed structure for engaging the internal hexagonal bolt. The handle hole is square, with anti-misinstallation protrusions on two opposite inner walls. The square core has corresponding grooves on the anti-misinstallation protrusions. The key includes a key body and a hexagonal operating lever, which is located at the top of the key body, forming a single unit. The groove on the square core consists of two square bars, with adjacent long sides of each bar having chamfered edges. The chamfered edges of the two bars are joined to form the groove. The length of the hexagonal operating lever extends at least 4mm beyond the edge of the key body. Several equidistant anti-slip strips are also provided on the inner surface of the handle hole. The surface of the square strip has anti-slip grooves corresponding to the anti-slip strips.
[0022] The actual usage method is as follows:
[0023] To avoid incorrect installation:
[0024] The square core is typically a square cross-section structure with grooves on its two opposite sides. These slightly curved grooves allow the hexagonal socket head cap screws to slide continuously towards the lowest point of the grooves during installation, until the door handles on both the inner and outer sides are fully tightened. However, if the installation direction is incorrect, the hexagonal socket head cap screws will directly abut against the smooth surface of the square core, failing to generate tightening force. An anti-misinstallation protrusion is incorporated into the handle hole to prevent the square core from being inserted at an incorrect angle, thus hindering the assembly of the square core with the door handle body.
[0025] Because of the small size of the hexagonal socket of door handle bolts, it is difficult to find a matching hex wrench even in households that regularly keep hardware tools on hand. Therefore, by directly fixing the hexagonal lever to the key, it is possible to tighten them at any time. Moreover, the size of the hexagonal socket bolts for door handles is generally the same, so even if the key for a door cannot be found, the tightening operation can be achieved using a key for another door.
[0026] The anti-slip strips and anti-slip grooves do not interact during assembly and do not affect each other. Only when the internal hex bolts are tightened will the internal hex bolts push the two symmetrical square strips apart, and only then will they come into contact, generating friction and resistance.
[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this invention is defined by the appended claims rather than the foregoing description, and it is therefore intended to include all variations falling within the meaning and scope of the equivalents of the claims within this invention.
Claims
1. A shiggle door handle, characterized in that The door handle body includes a handle head and a handle part, the handle head is internally provided with a handle hole, a square core is inserted into the handle hole, the handle head is externally provided with a square core locking hole, an internal hexagonal fastening bolt is assembled in the square core locking hole, a key is externally provided separately, the square core is composed of two symmetrical square strips, the square strips are both externally provided with arc concave structures for matching the internal hexagonal fastening bolt, the handle hole is a square hole, two opposite inner walls of the handle hole are externally provided with anti-misassembly convex structures, the square core is externally provided with groove structures corresponding to the anti-misassembly convex structures.
2. A child-resistant door handle according to claim 1, wherein The key includes a key body and a hexagonal operating rod, the hexagonal operating rod is arranged at the top of the key body, and the two are in an integrated structure.
3. A shiggle-free door handle according to claim 2, wherein The groove structure on the square core is composed of two square strips, two adjacent long edges of the square strips are externally provided with chamfer structures, and the chamfer structures of the two square strips are spliced to form the groove structure.
4. A tamper-proof door handle according to claim 3, characterised in that The length of the hexagonal operating rod exceeds the edge of the key body by at least 4 mm.
5. A shig door handle according to claim 4, wherein the handle is formed from a single piece of material. The inner wall surface of the handle hole is also externally provided with a plurality of anti-skid strips arranged at equal intervals.
6. A shig door handle according to claim 5, wherein The surface of the square strip is externally provided with anti-skid grooves corresponding to the anti-skid strips.