No-drill curtain track fixing structure

Abstract

The present invention provides a curtain track fixing structure that does not require drilling, comprising: a housing containing a rotating shaft, an internal threaded ring, a screw, and an arm. The active bevel gear of the rotating shaft can drive the passive bevel gear of the internal threaded ring to move the screw, so that a contact surface on the screw approaches a contact surface on the arm, thereby achieving the purpose of quick and clear operation.

Description

Technical Field

[0001] The present invention relates to a curtain track installation and fixing device, in particular to a punch-free curtain track fixing structure. Prior Art

[0002] Typically, when installing curtains, a track-mounted structure is first installed on the wall or window frame, and then the curtains are mounted on the track-mounted structure. The disadvantage of this installation method is that the track-mounted structure requires destructive fixing to the wall or window frame. For example, holes must be drilled or drilled in the wall or window frame before the nails or bolts can be fixed to the wall.

[0003] Therefore, some have proposed curtain rails that require no drilling. Examples include Mainland China Publication No. 218234690U, "A Drill-Free Installation Mechanism for Curtains," Mainland China Publication No. 220599677, "A Drill-Free Mounting Frame," and U.S. Publication No. 10597938, "CURTAIN MOUNTING UNIT." These applications utilize two screws or a screw plus a bolt to achieve the goal of drilling-free installation of curtain frames. However, these previous applications share the common problem of being difficult and time-consuming to operate.

[0004] Take the structure of the previous patent application, Publication No. 218234690U in mainland China, for example. Because the drive element requires multiple rotations for the worm gear in the linkage to rotate once, and each rotation of the worm gear also requires a single rotation of the screw, which in turn moves the locking block even slightly forward or backward, this operating method is extremely inefficient and unsatisfactory. Summary of the Invention

[0005] The main purpose of the present invention is to provide a curtain track fixing structure that is quick and easy to operate and does not require drilling.

[0006] To achieve the aforementioned primary objectives, the present invention provides a punch-free curtain track fixing structure comprising: a housing having a through hole on one side, an opening at one end of the housing communicating with a chamber, a polygonal seat with arc-shaped sides disposed between the opening and the chamber, a circular portion disposed on the other side of the chamber, a guide groove having a shape corresponding to that of the polygonal seat on one side of the circular portion, and an annular groove disposed on the other side of the circular portion. A rotating shaft disposed within the through hole of the housing, a driving bevel gear disposed at the other end of the rotating shaft, an internally threaded ring disposed within the circular portion of the housing, the internally threaded ring having an internally threaded hole, a passive bevel gear disposed on one side of the internally threaded ring, the passive bevel gear meshing with the active bevel gear of the rotating shaft, and an annular rib disposed on the rear side of the passive bevel gear. A screw, having a polygonal outer diameter corresponding to the shape of the polygonal seat, is mounted across the polygonal seat of the housing. The screw is disposed in a guide groove of the housing and penetrates the internally threaded hole of the internally threaded ring, where it is threadedly engaged with the internally threaded hole. One end of the screw is provided with an abutment surface, which is provided with a polygonal through-hole. The polygonal through-hole contains a support surface, which is provided with a through-hole having a diameter smaller than the polygonal through-hole. An arm has an elongated stem portion, which includes a polygonal section and a penetration section. The polygonal section has a shape corresponding to the polygonal through-hole and is provided with an abutment surface at one end and connected to the penetration section at the other end. One end of the penetration section is provided with a hook portion. The stem portion of the arm penetrates the polygonal through-hole of the screw, and the hook portion of the arm passes through the through-hole of the support surface and hooks onto the other side of the support surface. A spring is sleeved on the penetration section of the arm and positioned within the polygonal through-hole of the screw.

[0007] Due to the above-described structure, in the present invention, the number of teeth on the active bevel gear 22 on the rotating shaft is at least 0.7 times the number of teeth on the passive bevel gear 32 on the internally threaded ring 30. Therefore, in the present invention, the active bevel gear on the rotating shaft can quickly and clearly drive the passive bevel gear on the internally threaded ring to rotate, thereby driving the movement of the screw. The movement of the screw can cause the abutment surface to move toward the rear side of the abutment surface of the support arm, thereby locking the support arm and achieving the purpose of the present invention. Simple diagram description

[0008] FIG1 is a perspective schematic diagram of the present invention.

[0009] FIG2 is an exploded schematic diagram of the present invention.

[0010] FIG3 is a cross-sectional view taken along line 3-3 in FIG1 .

[0011] FIG4 is similar to FIG3 and is a cross-sectional view after the screw has moved.

[0012] FIG5 is similar to FIG3 , showing the state where the abutment surface of the screw rod abuts against the rear side of the abutment surface of the support arm. Implementation Method

[0013] The applicant first explains that throughout this specification, including the embodiments described below and the claims in the patent application, directional terms are based on the directions in the drawings. Furthermore, in the embodiments and drawings described below, identical component numbers represent identical or similar components or structural features. Directions in this specification are based on the directions in the drawings for ease of description and are not intended to be limiting.

[0014] Referring to Figures 1 to 5 , the punch-free curtain track fixing structure of the present invention comprises: a housing 10, which is formed by joining two shell members 11. A through hole 12 is defined on one side of the housing, and an opening 13 is defined at one end of the housing. A swivel bearing 14 is located at the through hole 12. The opening 13 communicates with a chamber 15. A polygonal seat 16 with arc-shaped sides is located between the opening 13 and the chamber 15. A circular portion 17 is defined on the other side of the chamber 15. A guide groove 18 corresponding in shape to the polygonal seat 16 is defined on one side of the circular portion 17, and an annular groove 19 is defined on the other side of the circular portion 17. In this embodiment, the other side of the circular portion is an annular groove, but this is not limiting and may also be an annular rib.

[0015] A rotating shaft 20 is mounted on the rotating bearing portion 14 at the housing through-hole 12 and is located on one side of the housing chamber 15. One end of the rotating shaft is provided with an inner polygonal hole 21, which is exposed at the housing through-hole 12. A driving bevel gear 22 is mounted on the other end of the rotating shaft 20. In this embodiment, the inner polygonal hole is a hexagonal hole, but this is not limiting. Alternatively, it may be a triangular hole, a square hole, a cross hole, or a straight hole.

[0016] An internally threaded ring 30 is disposed within the circular portion 17 of the housing. The ring 30 has an internally threaded hole 31. A passive bevel gear 32 is disposed on one side of the ring 30. This passive bevel gear 32 meshes with the active bevel gear 22 of the rotating shaft. An annular rib 33 is disposed on the rear side of the passive bevel gear 32 and engages with the annular groove 19, allowing the rotating shaft 20 to drive the ring 30 to rotate without moving. In this embodiment, the annular rib 33 is disposed on the rear side of the passive bevel gear of the ring 30, but this is not limiting. Alternatively, an annular groove symmetrically aligned with the circular container may be employed.

[0017] A screw 40, having a polygonal outer diameter with two circular arcs, is mounted astride the polygonal seat 16 of the housing. The outer surface of the screw 40 is threaded. The screw 40 is mounted in the housing's guide groove 18 and passes through the internally threaded hole 31 of the internally threaded ring 30, where it is threadedly engaged. Rotation of the internally threaded ring 30 causes the screw 40 to move without rotating. One end of the screw 40 is provided with an abutment surface 41, which is defined by a polygonal through-hole 42. The polygonal through-hole 42 is disposed along the longitudinal axis of the screw 40. A support surface 43 is disposed within the polygonal through-hole 42, which has a through-hole 44 having a diameter smaller than that of the polygonal through-hole 42.

[0018] An arm 50 comprises an elongated stem 51 with a polygonal section 52 and a penetration section 53. In this embodiment, the cross-section of the polygonal section 52 is hexagonal, but this is not limiting. It can also be triangular or square. Its shape corresponds to the polygonal through-hole 42 of the screw 40. The diameter of the virtual circumcircle formed by the polygonal section 52 must be greater than the outer diameter of the spring 60. One end of the polygonal section 52 is provided with an abutment surface 54, and the other end is connected to the penetration section 53. One end of the penetration section 53 is provided with a hook portion 55. The outer diameter of the penetration section 53 is smaller than that of the polygonal section 52, forming a shoulder surface 56 at the junction of the polygonal section 52 and the penetration section 53. The arm 50 has its stem 51 inserted into the polygonal through-hole 42 of the screw, and the hook portion 55 of the arm passes through the through-hole 44 of the support surface and hooks onto the support surface 43.

[0019] A spring 60 is sleeved on the penetrating section 53 of the support arm and located in the polygonal through hole 42 of the screw rod. One end of the spring 60 abuts against the shoulder surface 56 of the support arm rod portion 51, and the other end abuts against the support surface 43 in the polygonal hole.

[0020] With the above-described structure, the punch-free curtain track fixing structure of the present invention is installed at both ends of a conventional curtain track, similar to conventional products. Under normal conditions, the support arm 50 protrudes outward from the opening 13 of the housing due to the elastic force of the spring 60, as shown in Figures 1 and 3. When installing the curtain track, the user first presses the contact surface 54 against one side of the window frame, compressing the spring 60 to retract the support arm 50 toward the screw 40. Then, the user aligns the other end of the curtain track with the other side of the window frame. The spring force causes the support arm 50 to pop out, allowing the support arm's contact surface 54 to contact the window frame. It is important to emphasize that the elastic force of the spring 60 must be sufficient to support the weight of the curtain track, so that the curtain track can be temporarily fixed to the window frame using the spring's elastic force.

[0021] To lock the curtain rail, the user rotates the rotating shaft 20 through the inner polygonal hole. The active bevel gear 22 of the rotating shaft drives the passive bevel gear 32 of the internally threaded ring 30, causing the internally threaded ring 30 to rotate. The internally threaded hole 31 of the internally threaded ring 30 then drives the screw 40, causing it to move. Because the abutment surface 54 of the support arm 50 has already abutted the window frame or wall, the abutment surface 41 of the screw 40 gradually approaches and abuts against the rear of the abutment surface 54 of the support arm. This allows the user to lock the support arm 50, allowing the curtain rail to abut against both sides of the window frame without drilling holes, thus achieving the invention's goal of drilling-free curtain rail installation.

[0022] It should be specifically noted that in the present invention, the number of teeth on the active bevel gear 22 on the rotating shaft is at least 0.7 times the number of teeth on the passive bevel gear 32 on the internally threaded ring 30, and preferably is between 0.7 and 1.5 times. That is, if the number of teeth on the passive bevel gear 32 on the internally threaded ring 30 is 10, the number of teeth on the active bevel gear 22 on the rotating shaft 20 is 7 to 15. This ensures that the rotation of the rotating shaft is clearly and efficiently transmitted to the screw, allowing the screw 40 and the abutment surface 41 to move efficiently.

[0023] 10: Shell

[0024] 11: Shell

[0025] 12:Through hole

[0026] 13: Opening

[0027] 14: Rotating bearing

[0028] 15: Room

[0029] 16: Polygonal seat

[0030] 17: Round belly

[0031] 18:Guide ditch

[0032] 19: Annular groove

[0033] 20: Rotation axis

[0034] 21: Inner polygonal hole

[0035] 22: Active bevel gear

[0036] 30: Internal thread ring

[0037] 31: Internal thread hole

[0038] 32: Passive bevel gear

[0039] 33: Annular rib

[0040] 40: Screw

[0041] 41: Face to face

[0042] 42: Polygonal through hole

[0043] 43: Support surface

[0044] 44:Piercing

[0045] 50: Arm

[0046] 51: Rod

[0047] 52: Polygonal segment

[0048] 53: Wearing section

[0049] 54: contact surface

[0050] 55: Hook

[0051] 56: Shoulder

[0052] 60: Spring

Claims

1. A punch-free curtain track fixing structure, comprising: a shell having a through hole on one side, an opening at one end of the shell, the opening communicating with a receiving chamber, a polygonal seat with arc-shaped sides provided between the opening and the receiving chamber, a circular portion provided on the other side of the receiving chamber, a guide groove having a shape corresponding to the shape of the polygonal seat provided on one side of the circular portion; a rotating shaft provided at the through hole of the shell and located on one side of the receiving chamber, the rotating shaft having an inner polygonal hole at one end, the inner polygonal hole exposed at the through hole of the shell, a driving bevel gear provided at the other end of the rotating shaft; an internally threaded ring provided at the circular portion in the shell, the internally threaded ring having an internally threaded hole, a passive bevel gear provided on one side of the internally threaded ring, the passive bevel gear meshing with the active bevel gear of the rotating shaft, and the internally threaded ring can be driven to rotate by the rotating shaft without moving; A screw rod having a polygonal outer diameter with arc-shaped two sides, which can be arranged across the polygonal bearing seat of the shell, the screw rod is arranged in the guide groove of the shell and is passed through the internal threaded hole of the internal threaded ring, and is screwed with the internal threaded hole, and the rotation of the internal threaded ring can drive the screw rod to move without rotating, one end of the screw rod is provided with a butt surface, the butt surface is provided with a polygonal through hole, a support surface is provided in the polygonal through hole, and the support surface is provided with a through hole with a diameter smaller than the polygonal through hole; an arm having an elongated rod portion, the rod portion having a polygonal section and a through-hole, one end of the polygonal section is provided with a butt surface, and the other end is connected to the through-hole, one end of the through-hole is provided with a hook portion, the outer diameter of the through-hole section is smaller than the polygonal section, so that a shoulder surface is formed at the junction of the polygonal section and the through-hole, the arm is passed through the polygonal through hole of the screw rod with its rod portion, and the hook portion of the arm passes through the through hole of the support surface and hooks on the support surface; A spring is sleeved on the penetrating section of the support arm and is located in the polygonal through hole of the screw rod. One end of the spring abuts against the shoulder surface of the support arm rod portion, and the other end abuts against the supporting surface in the polygonal hole.

2. The punch-free curtain track fixing structure as described in claim 1, wherein the number of teeth of the active bevel gear on the rotating shaft is between 0.7 and 1.5 times the number of teeth of the passive bevel gear on the internally threaded ring.

3. The punch-free curtain rail fixing structure as described in claim 1, wherein a rotating bearing portion is provided at the through hole, and the rotating shaft is provided at the rotating bearing portion at the through hole of the housing.

4. The punch-free curtain track fixing structure as described in claim 3, wherein the number of teeth of the active bevel gear on the rotating shaft is between 0.7 and 1.5 times the number of teeth of the passive bevel gear on the internal thread ring.

5. The punch-free curtain track fixing structure as described in claim 4, wherein the shell is formed by covering two shell parts.

6. The punch-free curtain track fixing structure as described in claim 1, wherein the diameter of the virtual circumscribed circle formed by the polygonal segment of the support arm must be larger than the outer diameter of the spring.

7. The punch-free curtain track fixing structure as described in claim 1, wherein the elastic force of the spring is greater than the weight of the curtain.

8. The punch-free curtain rail fixing structure as described in claim 5, wherein the circular portion is provided with an annular groove, and the rear side of the passive bevel gear of the internally threaded ring is provided with an annular rib that is clamped in the annular groove.

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