Gear transmission lock box suitable for small cavity

Abstract

The utility model discloses a small cavity gear drive lock box, including lock box front panel, lock box back panel, transmission rod, decorative cover and drive gear, the drive gear is equipped with three first drive teeth, the transmission rod is equipped with three first tooth socket that engages with the first drive teeth, the first tooth socket is equipped with three second drive teeth, and the first tooth socket is equipped with three second tooth socket that engages with the second drive teeth. The outer sides of the first driving teeth on the two sides are each provided with a second tooth groove which is concave inwards, and the transmission rod is provided with two convex teeth meshed with the second tooth grooves. And the overall height of the lock box can be effectively reduced, so that the lock box is suitable for window profiles with common cavities and small cavities, and the application range is wider.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of door and window hardware fittings, and particularly relates to a gear transmission lock box suitable for small cavities. BACKGROUND

[0002] At present, the lock box, as an important transmission component of door and window hardware, is generally made of metal and can bear a certain force to play a transmission role. The lock box mainly comprises a lock box panel, a transmission rod and a driving gear. Five driving teeth are arranged on the driving gear, and five tooth grooves are arranged on the transmission rod in a matched mode. A certain angle of rotation of the driving teeth can be controlled by rotating a handle, so that the window can realize multiple opening modes such as flat opening, inward tilting and outward tilting. However, the distance from the center line of the gear to the bottom surface of the lock box on the market is large, so the window profile with a small cavity cannot use these lock boxes. Therefore, the existing transmission structure needs to be changed to reduce the overall height of the lock box. SUMMARY

[0003] In order to solve the technical problems existing in the prior art, the purpose of the present application is to provide a gear transmission lock box suitable for small cavities, which can effectively reduce the overall height of the lock box, so that it is suitable for window profiles with ordinary cavities and small cavities, and has a wider range of use.

[0004] To solve the above-mentioned technical problems, the present application adopts the following technical scheme:

[0005] A gear transmission lock box suitable for small cavities comprises a lock box front panel, a lock box back panel, a transmission rod, a decorative cover and a driving gear. Three first driving teeth are arranged on the driving gear. Three first tooth grooves meshing with the first driving teeth are arranged on the transmission rod. Two second tooth grooves recessed inward are arranged on the outer sides of the first driving teeth on both sides. Two convex teeth meshing with the second tooth grooves are arranged on the transmission rod.

[0006] Preferably, one side of the second tooth groove is provided with a third driving tooth protruding outward, and the protruding length of the third driving tooth is less than the protruding length of the first driving tooth.

[0007] Preferably, an initial state positioning mechanism is arranged between the first driving tooth and the lock box front panel or the lock box back panel.

[0008] Preferably, the initial state positioning mechanism comprises a positioning pin fixed at one end of the first driving tooth and a positioning hole arranged on the lock box front panel or the lock box back panel.

[0009] Preferably, a positioning groove is arranged on the first driving tooth, and one end of the positioning pin is located in the positioning groove.

[0010] Preferably, the positioning pin and the driving gear are integrally formed, and the diameter of the positioning slot is greater than the diameter of the positioning pin.

[0011] Preferably, the positioning pin is arranged on the central axis of the first driving tooth.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] When the transmission rod in the lock box needs to be moved to the inside-down or inside-tilt state through the driving gear, the two sides can be driven through the meshing of the corresponding protruding teeth and the second tooth groove, effectively shortening the distance from the center line of the driving gear to the bottom of the lock box, no longer needing a tooth height space between the driving gear and the bottom of the lock box, being lower in height under the same center distance, enabling the gear transmission lock box to be applicable to both ordinary cavity window profiles and small cavity window profiles, and being more widely used. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic view of the lock box reverse panel in the utility model in a disassembled state.

[0015] Figure 2 It is a meshing structure schematic view of the driving gear in the utility model in the lock box rotating to the inside-down or inside-tilt state.

[0016] In the figure: 1, decorative cover; 2, transmission rod; 3, lock box front panel; 4, first tooth groove; 5, second tooth groove; 6, third driving tooth; 7, driving gear; 8, first driving tooth; 9, protruding tooth; 10, lock box reverse panel; 11, positioning hole; 12, positioning slot; 13, positioning pin; 14, initial state positioning mechanism. DETAILED DESCRIPTION

[0017] In the following, the present application is further described in combination with the drawings and the specific embodiments, and it should be noted that, under the premise of not conflicting, the following described embodiments or technical features can be combined to form new embodiments.

[0018] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0019] The terms "first", "second", and the like in the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0020] As shown in Figure 1 and Figure 2 A kind of gear drive lock box suitable for small cavity, including lock box front panel 3, lock box back panel 10, transmission rod 2, decorative cover 1 and drive gear 7, the drive gear 7 is equipped with three first drive teeth 8, the transmission rod 2 is equipped with three first tooth groove 4 meshing with the first drive tooth 8, the outer side of the first drive tooth 8 on both sides is equipped with a second tooth groove 5 recessed inward, the transmission rod 2 is equipped with two convex teeth 9 meshing with the second tooth groove 5.

[0021] The inside of the existing gear drive lock box is improved, the existing drive teeth on both sides are replaced by second tooth groove 5, and two convex teeth 9 that can mesh with second tooth groove 5 are formed on transmission rod 2. The distance from the center line of drive gear 7 to the bottom of the lock box is effectively shortened, and the height is lower under the same center distance, which can be suitable for some narrow cavity window profiles. When the transmission rod 2 in the lock box needs to be moved to the window by the drive gear 7, the two sides can be driven by the corresponding convex teeth 9 and second tooth groove 5, and during rotation, the center distance from the drive gear 7 to the bottom of the lock box inside the lock box can be effectively reduced without drive tooth structure on both sides. No longer need a tooth height space between the drive gear 7 and the bottom of the lock box, so that the gear drive lock box can be suitable for both ordinary cavity window profiles and small cavity window profiles, and has a wider range of use.

[0022] Further improvement is that one side of the second tooth groove 5 is provided with a third drive tooth 6 protruding outward, and the protruding length of the third drive tooth 6 is less than the protruding length of the first drive tooth 8.

[0023] In order to ensure that the second tooth groove 5 and the convex tooth 9 can be stably reset when rotating to the window inside or outside, the contact depth on both sides of the convex tooth 9 is increased, a third drive tooth 6 is formed on one side of the second tooth groove 5 by protruding outward, the protruding length of the third drive tooth 6 is less than the protruding length of the first drive tooth 8, the overall structure is simple, the control of the drive gear 7 and the transmission rod 2 is convenient, and it also will not affect the assembly of small cavity profiles.

[0024] Further, the first driving tooth 8 is provided with an initial state positioning mechanism 14 between the lock box front panel 3 or the lock box back panel 10.

[0025] The initial state positioning mechanism 14 can make the gear transmission lock box and the internal transmission rod 2 and the driving gear 7 accurately in the flat open position after assembly, avoiding the misalignment of the transmission rod 2 after assembly due to assembly error, and ensuring the assembly stability of the entire linkage mechanism.

[0026] Further, the initial state positioning mechanism 14 includes a positioning pin 13 fixed at one end of the first driving tooth 8 and a positioning hole 11 provided on the lock box front panel 3 or the lock box back panel 10.

[0027] The initial state positioning mechanism 14 is composed of the positioning pin 13 installed on the first driving tooth 8 and the positioning hole 11 located on the lock box front panel 3 or the lock box back panel 10, as shown in Figure 1 The positioning hole 11 is located on the lock box back panel 10, and when the lock box back panel 10 is buckled, one end of the positioning pin 13 is inserted into the positioning hole 11, thereby ensuring the accuracy of the initial position. In use, only the driving gear 7 needs to be rotated, and the positioning pin 13 can be broken due to the cutting force. After installation, no additional removal operation is required.

[0028] Further, the first driving tooth 8 is provided with a positioning groove 12, and one end of the positioning pin 13 is located in the positioning groove 12; the positioning pin 13 is integrally formed with the driving gear 7, and the diameter of the positioning groove 12 is greater than the diameter of the positioning pin 13.

[0029] A positioning groove 12 is formed on the driving tooth, and one end of the positioning pin 13 is located in the positioning groove 12, which can make the length of the broken positioning pin 13 shorter and improve the length of the positioning pin 13, reduce the rigidity, and make it more convenient to break. The positioning pin 13 is integrally formed with the driving gear 7, and the diameter of the positioning groove 12 is greater than the diameter of the positioning pin 13; the manufacturing is more convenient, the operation difficulty is lower than separate assembly, and the process is more simple.

[0030] Further, the positioning pin 13 is located on the central axis of the first driving tooth 8, which is more in line with the operation habit and more convenient for production.

[0031] The above embodiments are only preferred embodiments of the present application, and cannot limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present application are within the scope of protection of the present application.

Claims

1. A lock box suitable for small-cavity gear transmission, characterized in that: The lock box includes a front panel (3), a back panel (10), a transmission rod (2), a decorative cover (1), and a drive gear (7) with three first drive teeth (8), the transmission rod (2) has three first tooth grooves (4) engaging with the first drive teeth (8), and the outer sides of the first drive teeth (8) are provided with a second tooth groove (5) inwardly recessed.

2. A small cavity gear drive lock box according to claim 1, wherein: The second tooth groove (5) is provided with a third drive tooth (6) outwardly protruded on one side, and the protruding length of the third drive tooth (6) is less than that of the first drive teeth (8).

3. A small cavity gear drive lock box according to claim 1, wherein: The first drive teeth (8) are provided with an initial state positioning mechanism (14) between the lock box front panel (3) or the lock box back panel (10).

4. A small cavity gear drive lock box according to claim 3, wherein: The initial state positioning mechanism (14) includes a positioning pin (13) fixed at one end of the first drive teeth (8) and a positioning hole (11) provided on the lock box front panel (3) or the lock box back panel (10).

5. A small cavity gear drive lock box according to claim 4, wherein: The first drive teeth (8) are provided with a positioning groove (12), and one end of the positioning pin (13) is located in the positioning groove (12).

6. A small cavity gear drive lock box according to claim 5, wherein: The positioning pin (13) and the drive gear (7) are integrally formed, and the diameter of the positioning groove (12) is greater than that of the positioning pin (13).

7. A small cavity gear drive lock box according to claim 6, wherein: The positioning pin (13) is provided on the central axis of the middle first drive teeth (8).

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