Anti-theft door back locking knob and anti-theft door lock

Abstract

The utility model discloses a counter lock knob of an anti-theft door and an anti-theft door lock, and aims to solve the problem that in the prior art, a clamp spring clamp and a clamp spring need to be used when the counter lock knob is mounted, so that the counter lock knob is very inconvenient to mount. In order to achieve the purpose, the rotary knob comprises a rotary knob body, and the rotary knob body comprises a rotary knob part facilitating rotation of the rotary knob body and a transmission part connected with the rotary knob part; the transmission part is provided with an elastic limiting part which can stretch out and draw back in the direction of the outer side wall of the transmission part, and a gap is formed between the elastic limiting part and the knob body. According to the utility model, the knob body can be directly clamped on the shell through the matching of the elastic limiting part and the knob body, so that the knob body can be directly prevented from falling off from the back lock hole of the shell, parts and tools such as a clamp spring, a clamp spring plier and the like do not need to be used during installation, and compared with the prior art, the knob has the characteristic of convenience in installation.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-theft door locks, in particular to an anti-lock knob for anti-theft doors and an anti-theft door lock. Background Art

[0002] An anti-theft door is a door equipped with an anti-theft lock that can resist abnormal opening under certain conditions within a certain period of time, has a certain safety protection performance, and meets the corresponding anti-theft safety level.

[0003] When the anti-lock knob of the existing anti-theft door is installed on the housing, usually the anti-lock knob is first passed through the knob hole on the housing, and then a circlip is clamped on the anti-lock knob, so that the anti-lock knob is fixedly arranged on the housing. In the above installation process, a circlip pliers is usually required to install the circlip. After the circlip is opened by the circlip pliers, the circlip is then clamped on the anti-lock knob. This makes the installation of such an anti-lock knob very troublesome.

[0004] For example, a anti-mislock device for anti-theft doors disclosed in the patent publication number CN215565076U, with an application date of January 18, 2022, installs the anti-lock knob on the housing by means of cooperation between a circlip and a circlip pliers, and the installation is very inconvenient. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide an anti-lock knob for anti-theft doors, aiming to solve the problem that in the prior art, a circlip pliers and a circlip are required for installing the anti-lock knob, making the installation of the anti-lock knob very inconvenient.

[0006] To achieve the above purpose, the utility model provides an anti-lock knob for anti-theft doors, including: a knob body, the knob body includes a knob part facilitating the rotation of the knob body and a transmission part connected to the knob part; an elastic limiting part capable of stretching along the outer wall direction of the transmission part is arranged on the transmission part, and a gap is arranged between the elastic limiting part and the knob body.

[0007] Through the cooperation between the elastic limiting part and the knob body, the knob body can be directly clamped on the housing, thereby directly preventing the knob body from falling off from the anti-lock hole of the housing. When installing, parts and tools such as circlips and circlip pliers are not required. Compared with the prior art, it has the characteristic of convenient installation; in addition, since there is no need to use a circlip to limit the knob body, the overall cost of the anti-theft door lock can also be saved.

[0008] Further, an installation groove is arranged on the outer wall of the transmission part, and the elastic limiting part is arranged in the installation groove.

[0009] Further, the elastic limiting part is an elastic limiting block, which is arranged at one end of the installation groove away from the transmission part, and the elastic limiting block protrudes from the outer side wall of the transmission part.

[0010] Further, an inclined guiding surface is arranged at one end of the elastic limiting block away from the knob body, and one end of the inclined guiding surface away from the knob part is smoothly connected to the outer side wall of the transmission part.

[0011] Further, the transmission part is a cylindrical block.

[0012] Further, there are two elastic limiting parts, which are respectively arranged at both ends of the transmission part in the radial direction.

[0013] The utility model also provides an anti-theft door lock, which includes a shell and also includes the above-mentioned anti-theft door reverse lock knob. An anti-lock hole is arranged on the shell, the transmission part passes through the anti-lock hole, and the shell is limited in the gap between the elastic limiting part and the knob body.

[0014] The utility model has the following advantages: through the cooperation of the elastic limiting part and the knob body, the knob body can be directly clamped on the shell, so as to directly prevent the knob body from falling off from the anti-lock hole of the shell. When installing, there is no need to use parts and tools such as circlips and circlip pliers. Compared with the prior art, it has the characteristics of convenient installation; in addition, since there is no need to use a circlip to limit the knob body, the overall cost of the anti-theft door lock can also be saved. Brief Description of the Drawings

[0015] Figure 1 is the three-dimensional structure diagram of the utility model.

[0016] Figure 2 is the cross-sectional view of the utility model.

[0017] Figure 3 is the installation structure diagram of the utility model after being combined with the shell.

[0018] Figure 4 is the cross-sectional view of the utility model after being combined with the shell.

[0019] Figure 5 is the cross-sectional view of another embodiment of the utility model after being combined with the shell.

[0020] Figure 6 is the installation structure diagram of another perspective of the utility model after being combined with the shell.

[0021] Among them, in the figure: 1. Knob part, 2. Transmission part, 21. Installation groove, 3. Cross groove, 4. Insurance strip, 5. Elastic limiting block, 51. Inclined guiding surface, 6. Telescopic block, 61. Guiding surface 61, 7. Ejecting spring, 8. Shell, 81. Anti-lock hole.

[0022] The realization, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0023] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] Embodiment 1: Refer to Figures 1 to 6 As shown, an anti-lock knob for a security door includes: a knob body, the knob body includes a knob portion 1 and a transmission portion 2, and the knob portion 1 can facilitate the rotation of the knob body; the transmission portion 2 is fixedly connected to the knob portion 1. An elastic limiting portion that can extend and contract along the outer sidewall direction of the transmission portion 2 is provided on the transmission portion 2, and a gap is provided between the elastic limiting portion and the knob body.

[0025] When this embodiment is used, first, the transmission portion 2 is passed through the anti-lock hole 81 of the housing 8. During the process that the transmission portion 2 passes through the anti-lock hole 81, the elastic limiting portion contracts towards the inside of the transmission portion 2 due to its own elasticity, so that the transmission portion 2 can smoothly pass through the anti-lock hole 81. When the elastic limiting portion completely passes through the anti-lock hole 81, the transmission limiting portion expands towards the outer sidewall direction of the transmission portion 2, so that the inner and outer sidewalls of the housing 8 are clamped in the gap between the elastic limiting portion and the knob body, that is, through the cooperation of the knob portion 1 and the elastic limiting portion, the knob body is fixedly clamped on the housing 8.

[0026] In this embodiment, through the cooperation of the elastic limiting portion and the knob body, the knob body can be directly clamped on the housing 8, thereby directly preventing the knob body from falling off from the anti-lock hole 81 of the housing 8. When installing, parts and tools such as snap rings and snap ring pliers do not need to be used. Compared with the prior art, it has the characteristic of convenient installation; in addition, since no snap ring is needed to limit the knob body, the overall cost of the anti-theft door lock can also be saved.

[0027] Embodiment 2: Refer to Figures 1 to 6 As shown, an anti-lock knob for a security door includes: a knob body, the knob body includes a knob portion 1 and a transmission portion 2, and the knob portion 1 can facilitate the rotation of the knob body; the transmission portion 2 is fixedly connected to the knob portion 1. An elastic limiting portion that can extend and contract along the outer sidewall direction of the transmission portion 2 is provided on the transmission portion 2, and a gap is provided between the elastic limiting portion and the knob body.

[0028] In this embodiment, the knob body and the transmission portion 2 are integrally formed, and the knob body and the transmission portion 2 are made of plastic.

[0029] The elastic limiting portion can be provided in several numbers, and several elastic limiting portions are evenly distributed along the circumferential direction of the outer sidewall of the transmission portion.

[0030] The transmission part 2 is a cylindrical block. A "cross" groove 3 is arranged on the end face of the cylindrical block away from the knob part 1. A safety strip 4 is installed in the cross groove 3.

[0031] An installation groove 21 is arranged on the outer side wall of the transmission part 2, and the installation groove 21 is arranged at one end of the transmission part 2 close to the knob part 1; an elastic limiting part is arranged in the installation groove 21.

[0032] The elastic limiting part is an elastic limiting block 5. In this embodiment, the elastic limiting block 5, the transmission part 2 and the knob part 1 are integrally formed and are all plastic products, having certain elasticity, so that the elastic limiting block 5 can expand and contract in the installation groove 21. The elastic limiting block 5 is fixedly arranged at one end of the installation groove 21 away from the transmission part 2, and the elastic limiting block 5 protrudes from the outer side wall of the transmission part 2.

[0033] An inclined guiding surface 51 is arranged at one end of the elastic limiting block 5 away from the knob body, and the end of the inclined guiding surface 51 away from the knob part 1 is smoothly connected with the outer side wall of the transmission part 2. When installing the knob body, the inclined guiding surface 51 can slide along the anti-lock hole 81. When sliding, the anti-lock hole 81 and the inclined guiding surface 51 interact, so that the elastic limiting block 5 contracts towards the inside of the installation groove 21, so that the transmission part 2 can smoothly pass through the anti-lock hole 81.

[0034] In one embodiment, two elastic limiting blocks 5 are arranged, and the two elastic limiting blocks 5 are respectively arranged at both ends in the radial direction of the transmission part 2. Through the action of the two elastic limiting blocks 5, the knob body can be more stably clamped at both ends of the anti-lock hole 81.

[0035] The working principle of this embodiment is as follows: First, the transmission part 2 is passed through the anti-lock hole 81 of the housing 8. When the transmission part 2 passes through the anti-lock hole 81, the inclined guiding surface 51 can slide along the anti-lock hole 81. When sliding, the anti-lock hole 81 and the inclined guiding surface 51 interact, so that the elastic limiting block 5 contracts towards the inside of the installation groove 21, so that the transmission part 2 can smoothly pass through the anti-lock hole 81. When the elastic limiting block 5 completely passes through the anti-lock hole 81, the elastic limiting block 5 expands towards the outer side wall of the transmission part 2, so that the inner and outer side walls of the housing 8 are clamped in the gap between the elastic limiting block 5 and the knob body, that is, through the cooperation of the knob part 1 and the elastic limiting block 5, the knob body is fixedly clamped on the housing 8.

[0036] Embodiment 3: Refer to Figures 1 to 6As shown in the figure, an anti-lock knob for a security door includes: a knob body, the knob body includes a knob portion 1 and a transmission portion 2, and the knob portion 1 facilitates the rotation of the knob body; the transmission portion 2 is fixedly connected to the knob portion 1. An elastic limiting portion capable of expanding and contracting along the outer wall direction of the transmission portion 2 is provided on the transmission portion 2, and a gap is provided between the elastic limiting portion and the knob body.

[0037] In this embodiment, the knob body and the transmission portion 2 are integrally formed, and the knob body and the transmission portion 2 are made of plastic or metal materials.

[0038] The elastic limiting portion can be provided in several numbers, and several elastic limiting portions are evenly distributed along the circumferential direction of the outer wall of the transmission portion.

[0039] The transmission portion 2 is a cylindrical block. A "cross" groove is provided on the end face of the cylindrical block away from the knob portion 1. A safety bar 4 is installed in the cross groove 3.

[0040] An installation groove 21 is provided on the outer wall of the transmission portion 2, and the installation groove 21 is provided at one end of the transmission portion 2 close to the knob portion 1; the elastic limiting portion is provided in the installation groove 21.

[0041] The elastic limiting portion is a telescopic block 6 and an ejecting spring 7. The installation groove 21 is arranged along the radial direction of the transmission portion 2, the telescopic block 6 is slidably arranged in the installation groove 21, and the ejecting spring 7 abuts between the telescopic block 6 and the installation groove 21.

[0042] A guiding surface 61 is provided at one end of the telescopic block 6 away from the knob body, and one end of the guiding surface 61 away from the knob portion 1 is smoothly connected to the outer wall of the transmission portion 2. So that when installing the knob body, the guiding surface 61 can slide along the anti-lock hole 81. When sliding, the anti-lock hole 81 and the guiding surface 61 interact, so that the telescopic block 6 can overcome the elastic force of the ejecting spring 7 and contract towards the inside of the installation groove 21, so that the transmission portion 2 can smoothly pass through the anti-lock hole 81.

[0043] In one embodiment, two telescopic blocks 6 are provided, and the two telescopic blocks 6 are respectively arranged at both ends of the transmission portion 2 in the radial direction. Through the action of the two telescopic blocks 6, the knob body can be more stably clamped at both ends of the anti-lock hole 81.

[0044] The working principle of this embodiment is as follows: First, the transmission part 2 is passed through the anti-lock hole 81 of the housing 8. When the transmission part 2 passes through the anti-lock hole 81, the guiding surface 61 can slide along the anti-lock hole 81. During the sliding process, the anti-lock hole 81 and the guiding surface 61 interact, enabling the guiding surface 61 to contract towards the inside of the installation groove 21 against the force of the ejecting spring 7, so that the transmission part 2 can smoothly pass through the anti-lock hole 81. When the guiding surface 61 completely passes through the anti-lock hole 81, the telescopic block 6 expands towards the outer sidewall of the transmission part 2 under the action of the ejecting spring 7, causing the inner and outer sidewalls of the housing 8 to be clamped in the gap between the telescopic block 6 and the knob body. That is, through the cooperation of the knob part 1 and the telescopic block 6, the knob body is fixedly clamped on the housing 8.

[0045] Embodiment 4: Refer to Figures 1 to 6 As shown, an anti-theft door lock includes a housing 8, and also includes the anti-lock knob for the anti-theft door described in any one of Embodiments 1 to 3. An anti-lock hole 81 is provided on the housing 8, the transmission part 2 passes through the anti-lock hole 81, and the housing 8 is limited in the gap between the elastic limiting part and the knob body.

[0046] When this embodiment is in use, first, the transmission part 2 is passed through the anti-lock hole 81 of the housing 8. During the process of the transmission part 2 passing through the anti-lock hole 81, the elastic limiting part contracts towards the inside of the transmission part 2 due to its own elasticity, enabling the transmission part 2 to smoothly pass through the anti-lock hole 81. When the elastic limiting part completely passes through the anti-lock hole 81, the transmission limiting part expands towards the outer sidewall of the transmission part 2, causing the inner and outer sidewalls of the housing 8 to be clamped in the gap between the elastic limiting part and the knob body. That is, through the cooperation of the knob part 1 and the elastic limiting part, the knob body is fixedly clamped on the housing 8.

[0047] In this embodiment, through the cooperation of the elastic limiting part and the knob body, the knob body can be directly clamped on the housing 8, thereby directly preventing the knob body from falling off from the anti-lock hole 81 of the housing 8. When installing, there is no need to use parts and tools such as circlips and circlip pliers. Compared with the prior art, it has the characteristic of convenient installation; in addition, since there is no need to use a circlip to limit the knob body, the overall cost of the anti-theft door lock can also be saved.

[0048] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An anti-lock knob for a security door, characterized in that, Comprising: A knob body, which includes a knob portion facilitating the rotation of the knob body and a transmission portion connected to the knob portion; An elastic limiting portion capable of expanding and contracting along the outer sidewall direction of the transmission portion is provided on the transmission portion, and there is a gap between the elastic limiting portion and the knob body; during use, the transmission portion is passed through the anti-lock hole of the housing. During the process of the transmission portion passing through the anti-lock hole, the elastic limiting portion contracts towards the inside of the transmission portion due to its own elasticity, enabling the transmission portion to smoothly pass through the anti-lock hole. When the elastic limiting portion completely passes through the anti-lock hole, the transmission limiting portion expands towards the outer sidewall direction of the transmission portion, causing the inner and outer sidewalls of the housing to be clamped in the gap between the elastic limiting portion and the knob body.

2. The anti-lock knob for the security door according to claim 1, wherein An installation groove is provided on the outer sidewall of the transmission portion, and the elastic limiting portion is arranged in the installation groove.

3. The anti-lock knob for the security door according to claim 2, wherein The elastic limiting portion is an elastic limiting block, and the elastic limiting block is arranged at one end of the installation groove away from the transmission portion, protruding from the outer sidewall of the transmission portion.

4. The anti-lock knob for the security door according to claim 3, wherein, An inclined guiding surface is provided at one end of the elastic limiting block away from the knob body, and the end of the inclined guiding surface away from the knob portion is smoothly connected to the outer sidewall of the transmission portion.

5. The anti-lock knob for the security door according to any one of claims 1 to 4, characterized in that, The transmission portion is a cylindrical block.

6. The anti-lock knob for the security door according to any one of claims 1 to 4, characterized in that There are two elastic limiting portions, and the two elastic limiting portions are respectively arranged at both ends in the radial direction of the transmission portion.

7. An anti-theft door lock, comprising a housing, characterized in that, It further includes an anti-lock knob for a security door according to any one of claims 1 to 6, wherein an anti-lock hole is provided on the housing, the transmission portion passes through the anti-lock hole, and the housing is limited in the gap between the elastic limiting portion and the knob body.

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