Keyless key type mechanical coded lock

Abstract

The utility model discloses a keyless button type mechanical coded lock, which comprises a movable frame and a plurality of guide posts fixed in a shell, and guide holes in sliding fit with the guide posts are arranged on the movable frame. The existing structure guides the moving frame to move through cooperation of the guide columns and the guide holes, the structure is simple, and moving is smooth.

Description

Technical Field

[0001] This utility model relates to a mechanical combination lock, and more particularly to a keyless push-button mechanical combination lock. Background Technology

[0002] As a security device or lock control mechanism, the push-button mechanical combination lock is mainly used in anti-theft locks. Compared with ordinary locks, it is easy to operate, has a good anti-theft effect, and does not require a key. Because it utilizes the specific structural function between the components, it does not require electricity, so it is more resistant to high temperatures and less affected by the environment, thus achieving a good anti-theft effect.

[0003] Ordinary button-type mechanical combination locks on the market (application number 200920217226.1; patent name: button-type cabinet mechanical combination lock) can be easily changed by anyone inserting a key into the key-changing shaft after the password is entered and the door is opened, thus posing a security risk. Moreover, the moving frame moves parallel to the shell by riveting eight long and short pull plates, which is complex in structure and not smooth in movement. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a keyless button mechanical combination lock.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A keyless push-button mechanical combination lock is characterized in that it includes a movable frame and several guide posts fixed in the housing, wherein the movable frame is provided with guide holes that slide with the guide posts.

[0007] A linear bearing that mates with the guide post is fixed inside the guide hole.

[0008] It also includes a coding block lock plate, a clearing plate, and a coding frame. The coding frame is provided with a positioning rod, the clearing plate is provided with a positioning hole, and the coding block lock plate is provided with an avoidance through hole. The positioning rod is located in the avoidance through hole. When the correct password is entered and the coding frame is in the unlocked position, the positioning rod can be inserted into the positioning hole.

[0009] The encoder frame is provided with four positioning rods arranged in a square, and the clearing plate is provided with four positioning holes at corresponding positions.

[0010] The end face edges of the positioning rod are all chamfered.

[0011] The encoder frame is provided with a positioning protrusion, and the encoder block locking plate is provided with a locking plate hole, with the positioning protrusion located in the locking plate hole.

[0012] The beneficial effects of this utility model are as follows: This utility model includes a movable frame and several guide posts fixed inside the housing. The movable frame is provided with guide holes that slide in conjunction with the guide posts. The current structure guides the movement of the movable frame through the cooperation of the guide posts and guide holes, which not only simplifies the structure but also ensures smooth movement. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a three-dimensional view of the front structure of a mechanical combination lock;

[0015] Figure 2 This is a three-dimensional view of the rear structure of a mechanical combination lock;

[0016] Figure 3 This is an exploded structural view of a mechanical combination lock;

[0017] Figure 4 This is a structural view of the shell. Detailed Implementation

[0018] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following embodiments described with reference to the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0019] The shapes, dimensions, scales, angles, and numbers disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore this disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the focus of this disclosure. Where the terms “comprising,” “having,” and “including” are used in this specification, additional components may be added unless “only” is used. Unless otherwise indicated, singular terms may include plural forms.

[0020] When interpreting components, even if not explicitly described, the components are understood to include a range of tolerances.

[0021] When describing positional relationships, such as when the positional relationship is described as "on," "above," "below," and "adjacent to," one or more parts may be arranged between two other parts unless "immediately following" or "directly" is used.

[0022] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases may be included unless “exactly” or “directly” is used.

[0023] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this disclosure.

[0024] As will be fully understood by those skilled in the art, the features of the different embodiments of this disclosure may be coupled or combined with each other in part or in whole, and may cooperate with each other and be technically driven in various ways. The embodiments of this disclosure may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0025] Reference Figures 1 to 4 This utility model discloses a keyless button-type mechanical combination lock, including a coding block lock plate 1, a clearing plate 2, and a coding frame 3. The coding frame 3 is provided with a positioning rod 4, the clearing plate 2 is provided with a positioning hole 5, and the coding block lock plate 1 is provided with a clearance through hole 6. The positioning rod 4 is located in the clearance through hole 6. After the correct password is entered and the coding frame 3 is in the unlocked position, the positioning rod 4 can be inserted into the positioning hole 5. In the above structure, because the coding block lock plate 1 is located between the clearing plate 2 and the coding frame 3, the coding block lock plate 1 is provided with a clearance through hole 6 to avoid the positioning rod 4. Since the coding block lock plate 1 needs to move, the clearance through hole 6 is an elongated hole, thus ensuring that the positioning rod 4 has lateral movement space after passing through the clearance through hole 6.

[0026] The principle of this structure is briefly described as follows: When the door is closed, the keypad of this combination lock is outside the door while the code-changing shaft 15 is inside the door. Therefore, the door needs to be opened to operate when changing the code. First, the correct password is entered to move the code holder 3 to the unlock position. In this position, the unlocking plate on the code holder 3 pushes the lock pin plate, releasing the restriction on the lock pin, and the door can be opened. However, after the door is opened, the code holder 3 is reset and is no longer in the unlock position. But the old structure can still change the code. Anyone can change the code by inserting the code-changing key into the code-changing shaft 15. The structure and principle of opening the door and changing the code have been disclosed in previous patents and will not be described in detail here.

[0027] To avoid the aforementioned problems, this application provides a positioning rod 4 on the encoding frame 3 and a positioning hole 5 on the clearing plate 2. Therefore, when the encoding frame 3 is reset, the positions of the positioning rod 4 and the positioning hole 5 are misaligned. Thus, when the code-changing key is inserted into the code-changing shaft 15, the positioning rod 4 will push against the clearing plate 2, preventing the clearing plate 2 from moving towards the encoding frame 3 and pushing the encoding block back to its original zero position. At this point, the code cannot be changed. Only when the correct password is entered again can the encoding frame 3 move to the unlocking position, where the positioning rod 4 and the positioning hole 5 overlap. When the code-changing key is then inserted into the code-changing shaft 15, the clearing plate 2 can move towards the encoding frame 3, and the positioning rod 4 will not push against the clearing plate 2 but will instead be inserted into the positioning hole 5. This allows the clearing plate 2 to push the encoding block back to its original zero position before code changing, thus enabling the code to be changed and a new password to be entered.

[0028] Therefore, only those who know the password can perform the code change, which prevents anyone with the key from changing the code after the door is opened, thus avoiding some security risks.

[0029] In summary, this structure has a positioning rod on the coding frame and a positioning hole on the clearing plate. Therefore, after the door is opened, the key cannot be inserted into the key-changing shaft to change the code because the positioning rod and the positioning hole are misaligned at this time. When the clearing plate moves, it will abut against the positioning rod, thus preventing code changing. Only when the correct password is entered again to move the coding frame to the unlocking position, where the positioning rod and the positioning hole overlap, can the key be inserted into the key-changing shaft to change the code and enter a new password.

[0030] As shown in the figure, the encoder frame 3 has four positioning rods 4 arranged in a square, and the cleaning plate 2 has four positioning holes 5 at corresponding positions. This makes the force more even when the positioning rods 4 are against the cleaning plate 2. The positioning rods 4 are square rods, and the positioning holes 5 are square holes. Moreover, the positioning holes 5 are elongated holes, so the positioning rods 4 have room to move left and right in the positioning holes 5.

[0031] As a further structural feature, the end face edges of the positioning rod 4 are all chamfered to prevent the positioning rod 4 from being unable to be inserted into the positioning hole 5 due to dimensional errors.

[0032] As shown in the figure, the system also includes a movable frame 7 and several guide posts 8 fixed within the housing. The movable frame 7 has guide holes 9 that slide with the guide posts 8. The current structure guides the movable frame 7 to move by the cooperation of the guide posts 8 and the guide holes 9, resulting in a simple structure and smooth movement. As a further structural feature, a linear bearing (not shown in the figure) that cooperates with the guide post 8 is fixed inside the guide hole 9, further reducing friction and making the movement even smoother. The housing of this application includes a front shell 12 and a bottom plate 13. Both the front shell 12 and the bottom plate 13 are provided with connecting holes 14, and the ends of the guide posts 8 are fastened to the corresponding connecting holes 14.

[0033] As shown in the figure, the coding frame 3 is provided with a positioning protrusion 10, and the coding block locking plate 1 is provided with a locking plate hole 11. The positioning protrusion 10 is located in the locking plate hole 11. In the old structure, the coding block locking plate 1 was guided by the guide post of the coding block locking plate 1. Now, the positioning protrusion 10 is used in conjunction with the locking plate hole 11 to guide the coding block locking plate 1. The positioning protrusion 10 is a square protrusion, and the locking plate hole 11 is a square elongated hole. Therefore, the positioning protrusion 10 can move relative to the locking plate hole 11.

[0034] The foregoing has provided a detailed description of a keyless button-type mechanical combination lock provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A keyless push button mechanical combination lock characterized by: The device includes a movable frame and several guide posts fixed inside the housing. The movable frame has guide holes that slide with the guide posts. It also includes a coding block locking plate, a clearing plate, and a coding frame. The coding frame has a positioning rod, the clearing plate has a positioning hole, and the coding block locking plate has an avoidance through hole. The positioning rod is located in the avoidance through hole. When the correct password is entered and the coding frame is in the unlocked position, the positioning rod can be inserted into the positioning hole.

2. A keyless push button mechanical combination lock according to claim 1, wherein: A linear bearing that mates with the guide post is fixed inside the guide hole.

3. A keyless push button mechanical combination lock according to claim 1, wherein: The encoder frame is provided with four positioning rods arranged in a square, and the clearing plate is provided with four positioning holes at corresponding positions.

4. A keyless push button mechanical combination lock according to claim 1, wherein: The end face edges of the positioning rod are all chamfered.

5. A keyless push button mechanical combination lock according to claim 1, wherein: The encoder frame is provided with a positioning protrusion, and the encoder block locking plate is provided with a locking plate hole, with the positioning protrusion located in the locking plate hole.

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