Cam lock
By introducing protective rings and spring structures into the tongue lock, the poor anti-theft and structural complexity problems caused by the exposed password are solved, and the waterproof, dustproof and anti-theft effects are achieved, and the parts are simplified, which extends the service life and reduces the connection of the components. production costs.
Patent Information
- Application Number
- CN202421073000.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-16
AI Technical Summary
The exposed password of the existing tongue locks leads to poor anti-theft, is susceptible to dust and moisture, has high structural complexity, which increases the production cost and low assembly efficiency.
A lock core structure including a protective ring and a spring is designed. The protective ring is located inside the lock body and a polygonal shape is provided outside the lock core. It provides waterproof, dustproof and anti-theft functions through the first and second springs, and simplifies the components. Structure, reducing the number of parts.
Effectively prevent dust and moisture from entering, enhance theft resistance, extend service life, simplify the structure, reduce production costs and assembly complexity.
Smart Images
Figure CN222295966U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of locks, in particular to a cam lock. Background Art
[0002] On vehicles or equipment in industries such as rail transit, a tongue lock is used to lock doors or windows. The utility model patent with patent number CN218029600U discloses a compression tongue lock, including a lock body (1) having a rotating shaft (2) inside; an unlocking mechanism, which includes a lock core sleeved on one end of the rotating shaft (2) for rotating the rotating shaft (2); a lock tongue (3), which is installed on the rotating shaft (2) away from the lock core end; the unlocking mechanism includes: a pin shaft (4), which is inserted in the middle of the rotating shaft (2); a transmission member, which rotates with the lock core and cooperates with the pin shaft (4) to drive the rotating shaft (2) to move axially; an unlocking member, which is fixedly connected to the lock body (1) for guiding the rotating shaft (2) to rotate around its own axis, an inner sleeve (5), which is sleeved on the outer side of the rotating shaft (2) and is connected to the lock core in transmission; a spiral groove (6), which has a pair of arc-shaped and surrounds the outer wall of the inner sleeve (5); wherein the spiral groove (6) and the inner sleeve (5) are connected to each other. The end of the pin shaft (4) is movably engaged, and the transmission member further comprises: a slot, which is arranged on the inner wall of the rotating shaft (2); an insert block (7), which is integrally formed on the end surface of the inner sleeve (5) and inserted in the slot; an outer sleeve (8), which is sleeved on the outside of the transmission member; a pair of guide grooves (9), which are arranged on the opposite side of the outer sleeve (8) and are parallel to the axis of the rotating shaft (2); a pair of rotation grooves (10), which are arranged on the opposite side of the outer sleeve (8) and connected to the ends of the guide grooves (9) and extend along the circumference of the outer sleeve (8); wherein the guide grooves (9) and the rotation grooves (10) are movably engaged with the end of the pin shaft (4), and the lock core comprises a lock core rotary cover (12), which is rotatably installed in the lock body (1); and a code block (13), which is irregularly arranged on the outer end of the lock core rotary cover (12).
[0003] The above-mentioned cam lock has the following disadvantages during actual production and use: 1. The combination block is exposed to the outside, and thieves can easily know its size and make a key suitable for it, which has weak anti-theft performance; 2. The combination block is exposed to the outside, and dust, moisture, etc. can easily enter, affecting the overall service life of the cam lock; 3. An additional inner sleeve is provided, and the spiral groove is provided on the inner sleeve. The inner sleeve and the rotating shaft are linked by means of insert blocks and slots, which increases the complexity of the structure, increases the number of parts, increases the production cost, and reduces the assembly efficiency. Summary of the invention
[0004] The technical problem to be solved by the utility model is to provide a cam lock with waterproof, dustproof and anti-theft functions in view of the deficiencies of the above-mentioned prior art.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cam lock, comprising a lock body, wherein a rotating shaft, an unlocking mechanism, and a lock tongue connected to the end of the rotating shaft are arranged in the lock body, wherein the unlocking mechanism comprises a lock core sleeved on one end of the rotating shaft, a pin shaft and an unlocking member, wherein the lock core is used to rotate the rotating shaft, the pin shaft is inserted on the rotating shaft, and the unlocking member is fixedly connected to the lock body to guide the rotating shaft to rotate around its own axial direction, and is characterized in that: a lock core linked to the rotating shaft is also arranged in the lock body, wherein the lock core comprises a linkage part sleeved on the rotating shaft, a locking member located at one end of the linkage part The lock core part is provided with a protective ring on the outer sleeve of the lock core part, and the protective ring is located in the lock body. The lower end face of the protective ring is connected to a limiting rod, and the axis of the limiting rod is parallel to the end face of the protective ring. The lock core part is provided with a strip limiting groove for the limiting rod to pass through. The lock core part is provided with a first spring on the outer sleeve of the lock core part, and an annular connecting surface is formed at the connection between the linkage part and the lock core part, one end of the first spring is against the lower end face of the protective ring, and the other end is against the annular connecting surface. The end face of the lock core part, the upper end face of the protective ring and the lock body panel are all kept flush when not subject to external force.
[0006] The utility model with the above characteristics: the protective ring has waterproof and dustproof functions, and its end face is kept flush with the end face of the lock core and the lock body panel, which can prevent dust, impurities, moisture, etc. from entering the interior of the lock body and extend the service life of the tongue lock; the end face of the protective ring is kept flush with the end face of the lock core, so that people cannot directly see the entire structure of the lock core from the outside, and thus cannot prepare a key compatible with the lock core, which has a certain anti-theft effect; by setting the first spring, when the protective ring presses down the first spring, the first spring will generate a huge elastic force to prevent the protective ring from continuing to press down. When using the compatible key, the lock core can only be rotated to unlock the lock by pressing down the protective ring until the key is fully connected to the lock core. When the key is lost and picked up by criminals, who attempt to use the key to unlock the lock, because the criminals are panic-stricken, nervous, and guilty during the period of committing illegal acts, when they find that the protective ring is difficult to press down and they cannot unlock the lock smoothly, they give up in order to protect themselves, which has a certain anti-theft effect.
[0007] A further arrangement of the utility model is that the linkage part is tubular, and a pair of spiral grooves are provided on its outer wall, the spiral grooves are arc-shaped and surround the outer wall of the linkage part, the pin shaft passes through the two spiral grooves at the same time, and the linkage part rotates with the lock core and cooperates with the pin shaft to drive the rotating shaft to move axially.
[0008] The utility model with the above-mentioned features: the lock core is arranged into two integrally formed parts, wherein the linkage part is equivalent to the inner sleeve in the background technology, which reduces the number of parts and simplifies the connection structure between the parts and simplifies the overall structure of the cam lock.
[0009] A further arrangement of the utility model is: the unlocking piece is sleeved on the outside of the rotating shaft, and is provided with a pair of guide grooves, the guide grooves include a large rectangular groove and a small rectangular groove arranged in parallel, the two are connected, the inner wall of the lock body is provided with a rectangular block adapted to the large rectangular groove, the end face of the rectangular block is connected to the bottom of the large rectangular groove, and a track groove for the movement of the pin shaft end is formed between the side face of the rectangular block, the small rectangular groove, the end of the unlocking body and the end of the lock body.
[0010] The utility model with the above characteristics: the unlocking sleeve is fixed on the lock body by plugging with the lock body, and the track groove formed between the unlocking sleeve and the lock body has a guiding effect on the pin shaft.
[0011] A further arrangement of the utility model is: the lock tongue sleeve is arranged outside the rotating shaft, the rotating shaft is provided with a limiting step which abuts against one end face of the lock tongue, the rotating shaft is connected with a locking member which limits the axial movement of the lock tongue, a cavity is formed between the inner cavity of the linkage part and the end of the rotating shaft, a second spring is arranged in the cavity, one end of the second spring abuts against the top wall of the inner cavity of the linkage part, and the other end abuts against the end of the rotating shaft.
[0012] The utility model with the above-mentioned characteristics: the two end faces of the lock tongue are respectively against the limit step and the locking piece, so as to fix the lock tongue. However, the use environment of the lock tongue lock is usually a turbulent carriage, so the locking piece may be loose. By arranging a second spring at the end of the rotating shaft, the second spring is always in a compressed state, and its own elastic force gives the rotating shaft a downward force, so that the limit step is always kept against the end face of the lock tongue, which has an anti-loosening effect.
[0013] The utility model is further configured as follows: an inner hole is provided in the rotating shaft, an inner thread which is threadedly connected to a locking member is provided on the hole wall of the inner hole, the locking member is a locking screw, and the head of the locking screw abuts against a locking tongue.
[0014] The utility model with the above characteristics: the locking piece adopts an anti-loosening nut, which further ensures the anti-loosening effect of the lock tongue; a threaded inner hole is arranged in the rotating shaft, which is convenient for assembly between the rotating shaft and the locking piece.
[0015] A further configuration of the utility model is that the inner wall of the protection ring is a polygon, and the outer periphery of the lock core is a polygon that matches the protection ring.
[0016] The utility model with the above characteristics: the protection ring and the outer part of the lock core are arranged in a polygonal shape, which is different from the common triangle and rectangle on the market, thereby enhancing the anti-theft effect.
[0017] The utility model is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.
[0019] Figure 2 It is a cross-sectional view of an embodiment of the utility model.
[0020] Figure 3 It is an exploded view of an embodiment of the utility model.
[0021] Figure 4 This is a schematic diagram of the structure of the embodiment of the utility model after the lock body is removed.
[0022] Figure 5 It is a structural schematic diagram of the lock body of an embodiment of the utility model.
[0023] Figure 6 It is a cross-sectional view of the lock body and the unlocking member according to an embodiment of the utility model.
[0024] Figure 7 It is a schematic structural diagram of a key according to an embodiment of the utility model. DETAILED DESCRIPTION
[0025] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.
[0026] like Figure 1-6 The illustrated embodiment of a tongue lock comprises a lock body 1, in which a rotating shaft 2, an unlocking mechanism, and a lock tongue 3 connected to the end of the rotating shaft 2 are arranged. The unlocking mechanism comprises a lock core 4 and a pin 5 unlocking member 7 sleeved on one end of the rotating shaft 2. The lock core 4 is used to rotate the rotating shaft 2, and the pin 5 is inserted on the rotating shaft 2. The unlocking member 7 is fixedly connected to the lock body 1 and is used to guide the rotating shaft 2 to rotate around its own axis. The unlocking member 7 is sleeved on the outer side of the rotating shaft 2 and is provided with a pair of guide grooves 71. The guide grooves 71 include a large rectangular groove 711 and a small rectangular groove 712 arranged in parallel, and the two are connected. A rectangular block 11 adapted to the large rectangular groove 711 is provided on the inner wall of the lock body 1, and the end face of the rectangular block 11 is connected to the bottom of the large rectangular groove 711. A track groove 12 for the end of the pin 5 to move is formed between the side face of the rectangular block 11, the small rectangular groove 712, the end of the unlocking member 7 and the end of the lock body 1.
[0027] The lock core 4 includes a linkage part 41 sleeved with the rotating shaft 2, a lock core part 42 located at one end of the linkage part 41, a protective ring 8 is provided on the outer sleeve of the lock core part 42, the inner wall of the protective ring 8 is a polygon, the outer periphery of the lock core part 42 is a polygon adapted to the protective ring 8, the protective ring 8 is located in the lock body 1, the lower end face of the protective ring 8 is connected to a limiting rod 9, the axis of the limiting rod 9 is parallel to the end face of the protective ring 8, the lock core part 42 is provided with a strip limiting groove 421 for the limiting rod 9 to pass through, and the outer sleeve of the lock core part 42 is provided with a first elastic The spring 10, the connection between the linkage part 41 and the lock core part 42 forms an annular connection surface 43, one end of the first spring 10 is against the lower end surface of the protective ring 8, and the other end is against the annular connection surface 43. The end surface of the lock core part 42, the upper end surface of the protective ring 8 and the lock body 1 panel are all kept flush when not subjected to external force. The linkage part 41 is tubular, and its outer wall is provided with a pair of spiral grooves 411. The spiral grooves 411 are arc-shaped and surround the outer wall of the linkage part 41, and the pin 5 passes through the two spiral grooves 411 at the same time.
[0028] A sealing ring groove 412 for installing the sealing ring 17 is provided outside the linkage portion 41 . The sealing ring groove 412 is arranged below the annular connecting surface 43 facing the linkage portion 41 .
[0029] The lock tongue 3 is sleeved on the outside of the rotating shaft 2. The rotating shaft 2 is provided with a limiting step 21 that abuts against one end face of the lock tongue 3. The rotating shaft 2 is connected with a locking piece 13 that limits the axial movement of the lock tongue 3. The locking piece 13 is an anti-loosening screw. An inner hole 21 is provided in the rotating shaft 2. The hole wall of the inner hole 21 is provided with an internal thread that is threadedly connected to the locking piece 13. The head of the anti-loosening screw abuts against the lock tongue 3. A cavity 14 is formed between the inner cavity of the linkage part 41 and the end of the rotating shaft 2. A second spring 15 is provided in the cavity 14. One end of the second spring 15 abuts against the top wall of the inner cavity of the linkage part 41, and the other end abuts against the end of the rotating shaft 2.
[0030] The key 16 that this cam lock is adapted to is as follows Figure 7 As shown, the end of the key has a slot 161 adapted to the lock core, the inner wall of the slot near the bottom of the slot is in a shape adapted to the lock core, and the inner wall of the slot at the notch is circular.
[0031] In actual use, after pairing the key with the lock core, the tongue lock can be opened or closed; use the key to press the protective ring downward, the first spring is compressed, and at the same time, a restoring elastic force is generated to prevent the protective ring from continuing to press down. The operator needs to use more force to press the key downward to make the slot fit with the lock core part, and then the key can be used to rotate the lock core, and the spiral groove set on the lock core rotates accordingly, and the pin shaft located in the lock core moves along the path of the spiral groove. The spiral groove 411 includes a first side 4111 and a second side 4112. When the lock core rotates to the point where the pin shaft is located at the first side of the spiral groove, When the two sides 4112 are engaged, the space in which the second spring is located becomes larger, and the second spring has an outward thrust on the rotating shaft, causing the lock tongue and the rotating shaft to move a certain distance toward the side away from the lock body. When the key continues to be turned, since the pin shaft is already in abutment with the second side 4112, the lock core is rotated to make the rotating shaft and the lock core rotate synchronously. Since the lock tongue is fixedly connected to the rotating shaft, the rotating shaft will drive the lock tongue to rotate synchronously until the lock tongue rotates to a preset angle (90°) to complete unlocking. At this time, the key has turned 180°, and when it needs to be locked, just rotate the lock core in the opposite direction. Its operating principle is the same as above.
Claims
1. A cam lock, comprising a lock body, wherein the lock body is provided with a rotating shaft, an unlocking mechanism, and a lock tongue connected to the end of the rotating shaft, wherein the unlocking mechanism comprises a lock core sleeved on one end of the rotating shaft, a pin shaft, and an unlocking member, wherein the lock core is used to rotate the rotating shaft, the pin shaft is inserted on the rotating shaft, and the unlocking member is fixedly connected to the lock body to guide the rotating shaft to rotate around its own axial direction, characterized in that: The lock core includes a linkage part sleeved with the rotating shaft and a lock core part located at one end of the linkage part, a protective ring is arranged on the outer sleeve of the lock core part, the protective ring is located in the lock body, the lower end face of the protective ring is connected to a limiting rod, the axis of the limiting rod is parallel to the end face of the protective ring, the lock core part is provided with a strip limiting groove for the limiting rod to pass through, a first spring is arranged on the outer sleeve of the lock core part, an annular connecting surface is formed at the connection between the linkage part and the lock core part, one end of the first spring is abutted against the lower end face of the protective ring, and the other end is abutted against the annular connecting surface, the end face of the lock core part, the upper end face of the protective ring and the lock body panel are all kept flush when not subject to external force.
2. A cam lock according to claim 1, characterized in that: The linkage part is tubular, and a pair of spiral grooves are arranged on its outer wall. The spiral grooves are arc-shaped and surround the outer wall of the linkage part. The pin passes through the two spiral grooves at the same time. The linkage part rotates with the lock core and cooperates with the pin to drive the shaft to move axially.
3. A cam lock according to claim 1, characterized in that: The unlocking piece is sleeved on the outside of the rotating shaft and is provided with a pair of guide grooves. The guide grooves include a large rectangular groove and a small rectangular groove arranged in parallel, and the two are connected. The inner wall of the lock body is provided with a rectangular block adapted to the large rectangular groove, and the end face of the rectangular block is connected to the bottom of the large rectangular groove. A track groove for the movement of the pin shaft end is formed between the side face of the rectangular block, the small rectangular groove, the end of the unlocking body and the end of the lock body.
4. A cam lock according to claim 1, characterized in that: The lock tongue sleeve is arranged outside the rotating shaft, and the rotating shaft is provided with a limiting step that abuts against one end face of the lock tongue. The rotating shaft is connected with a locking member that limits the axial movement of the lock tongue. A cavity is formed between the inner cavity of the linkage part and the end of the rotating shaft. A second spring is arranged in the cavity, and one end of the second spring abuts against the top wall of the inner cavity of the linkage part, and the other end abuts against the end of the rotating shaft.
5. A cam lock according to claim 4, characterized in that: An inner hole is arranged in the rotating shaft, and an inner thread which is threadably connected with a locking member is arranged on the hole wall of the inner hole. The locking member is a locking screw, and the head of the locking screw abuts against a locking tongue.
6. A cam lock according to any one of claims 1 to 5, characterized in that: The inner wall of the protection ring is a polygon, and the outer periphery of the lock core is a polygon that matches the protection ring.