Pin tumbler lock cylinder

Abstract

The utility model belongs to the technical field of locks, and particularly discloses a pin tumbler lock cylinder which is mainly composed of an inner sleeve, a shell, a clamping ring, 16 pairs of marbles and the like, and the pair of marbles is composed of a long pin shaft, a short lifting pin and a first spring. And the short pin shaft, the long lifting pin and the second spring form a pair of marbles. According to the utility model, the 16 pairs of marbles are matched with the 16 corresponding grooves on the key, so that when the key is inserted, after the 16 corresponding grooves are correctly matched with the 16 pairs of marbles, the key can rotate, that is, the lock cylinder can rotate so as to open the lock.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and in particular to a pin tumbler lock cylinder. Background Technology

[0002] The lock cylinder is the main component that controls the opening of a lock and is considered the "heart" of the lock. It refers to the core part that works with the key and can rotate to move the bolt.

[0003] Because existing lock cylinders, when installed without a key, can be easily moved to the unlocking position by using objects such as paperclips, allowing the lock cylinder to rotate and thus open the lock, current lock cylinders have low security and can be easily opened without a key. Utility Model Content

[0004] The purpose of this utility model is to solve the technical problems existing in the background art. To this end, a pin tumbler lock cylinder is provided.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A pin tumbler lock cylinder includes an inner sleeve and an outer sleeve, wherein the inner sleeve is fitted inside the outer sleeve;

[0007] The inner sleeve is slidably connected to a long pin shaft along its radial direction, and the outer sleeve is slidably connected to a short top pin along its radial direction.

[0008] One end of the long pin extends into the key sleeve cavity of the inner sleeve and abuts against the key, the other end of the long pin abuts against one end of the short top pin, and the other end of the short top pin abuts against a first spring.

[0009] The following is a further defined technical solution of this utility model: the inner sleeve is slidably connected to a short pin shaft along its radial direction, the outer sleeve is slidably connected to a long top pin along its radial direction, one end of the short pin shaft extends into the key sleeve cavity of the inner sleeve and abuts against the key, the other end of the short pin shaft abuts against one end of the long top pin, and the other end of the long top pin abuts against a second spring.

[0010] The following is a further defined technical solution of this utility model: the long pin is configured as a T-shaped pin, the short pin is configured as a T-shaped pin, and the inner sleeve has multiple stepped sliding cavities along its radial direction for the long pin or the short pin to slide. The small outer diameter shaft of the long pin extends into the key sleeve cavity of the inner sleeve through the small inner diameter cavity of the stepped sliding cavity, and the small outer diameter shaft of the short pin extends into the key sleeve cavity of the inner sleeve through the small inner diameter cavity of the stepped sliding cavity.

[0011] The following is a further defined technical solution of this utility model: the outer shell has a plurality of linear sliding cavities along its radial direction, the first spring and the short top pin cooperate and are located in the same linear sliding cavity, and the second spring and the long top pin cooperate and are located in the same linear sliding cavity.

[0012] The following is a further defined technical solution of this utility model: the outer wall of the key is provided with a first groove, and the first groove abuts against the long pin shaft.

[0013] The following is a further defined technical solution of this utility model: a second groove is provided on the outer side wall of the key, and the second groove abuts against the short pin.

[0014] The following is a further defined technical solution of this utility model: the outer wall of the inner sleeve away from the key inlet is provided with a first rotating concave-convex platform, and the inner wall of the outer shell away from the key inlet is provided with a second rotating concave-convex platform. The concave part of the first rotating concave-convex platform cooperates with the convex part of the second rotating concave-convex platform, and the convex part of the first rotating concave-convex platform cooperates with the concave part of the second rotating concave-convex platform.

[0015] The following is a further defined technical solution of this utility model: the inner sleeve is fitted into the outer shell and one end of the inner sleeve away from the key inlet protrudes from the outer shell. The part of the inner sleeve protruding from the outer shell is provided with a retaining ring groove. The retaining ring groove holds a retaining ring, and the retaining ring abuts against the end of the outer shell.

[0016] Compared with the prior art, the present invention has the following technical effects:

[0017] This invention features 16 pairs of pins that engage with 16 corresponding slots on the key. When the key is inserted, the key can only turn after the 16 corresponding slots and 16 pairs of pins are correctly engaged, thus allowing the lock cylinder to rotate and open the lock.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a side view of the structure of this utility model;

[0022] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0023] Figure 4 This is a schematic diagram of the inner sleeve in this utility model;

[0024] Figure 5 This is a schematic diagram of the outer shell structure in this utility model;

[0025] Figure 6 This is a schematic diagram of the key structure used in conjunction with the product structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the product in which the key is inserted.

[0027] Reference numerals: 1. Inner sleeve; 101. Stepped slide cavity; 102. First rotating concave-convex platform; 103. Key sleeve cavity; 104. Snap ring groove; 2. Outer shell; 201. Linear slide cavity; 202. Second rotating concave-convex platform; 3. Long pin; 4. Short top pin; 5. First spring; 6. Short pin; 7. Long top pin; 8. Second spring; 9. Key; 901. First groove; 902. Second groove; 10. Snap ring. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] like Figure 1 and 2 As shown, this embodiment provides a pin tumbler lock cylinder, which mainly consists of an inner sleeve 1, an outer shell 2, a retaining ring 10, and 16 pairs of pins (of which, a pair of pins consists of a long pin 3, a short top pin 4, and a first spring 5; and a pair of pins consists of a short pin 6, a long top pin 7, and a second spring 8).

[0030] The inner sleeve 1 is fitted into the outer shell 2, with the end of the inner sleeve 1 extending out of the outer shell 2 away from the key 9 inlet. The portion of the inner sleeve 1 extending out of the outer shell 2 (its end being a latch for engaging or disengaging with the lock) has a retaining ring groove 104. A retaining ring 10 is engaged in the retaining ring groove 104, and the retaining ring 10 abuts against the end of the outer shell 2. Figure 4As shown. Therefore, the inner sleeve 1 and the outer shell 2 are axially positioned by a retaining ring 10 to prevent the inner sleeve 1 from detaching outward, so that the lock cylinder structure can be installed inside the lock. The latch at the end of the inner sleeve 1 can be fastened or separated from the lock.

[0031] like Figure 1 and 3 As shown, the inner sleeve 1 has 4 (circumferentially distributed) * 4 (axially distributed) stepped sliding cavities 101 radially distributed on its sidewall, and the outer sleeve 2 has 4 (circumferentially distributed) * 4 (axially distributed) straight sliding cavities 201 radially distributed on its sidewall. The stepped sliding cavities 101 and the straight sliding cavities 201 correspond one-to-one.

[0032] Four stepped sliding cavities 101 (circumferentially distributed) * two (axially distributed) are selected as a group, along with four linear sliding cavities 201 (circumferentially distributed) * two (axially distributed). A T-shaped long pin 3 is placed in each stepped sliding cavity 101, and a short top pin 4 and a first spring 5 are placed in each linear sliding cavity 201. The small outer diameter of the long pin 3 extends into the key sleeve cavity 103 of the inner sleeve 1 through the small inner diameter cavity of the stepped sliding cavity 101 and abuts against the key 9. The other end of the long pin 3 abuts against one end of the short top pin 4, and the other end of the short top pin 4 abuts against the first spring 5. When the key 9 is inserted into the key sleeve cavity 103 of the inner sleeve 1, the long pin 3 slides stably within the stepped sliding cavity 101 under the elastic action of the first spring 5.

[0033] Another set of four (circumferentially distributed) * two (axially distributed) stepped sliding cavities 101 and four (circumferentially distributed) * two (axially distributed) linear sliding cavities 201 are selected. A T-shaped short pin 6 is placed in each stepped sliding cavity 101, and a long top pin 7 and a second spring 8 are placed in each linear sliding cavity 201. The small outer diameter of the short pin 6 extends into the key sleeve cavity 103 of the inner sleeve 1 through the small inner diameter cavity of the stepped sliding cavity 101 and abuts against the key 9. The other end of the short pin 6 abuts against one end of the long top pin 7, and the other end of the long top pin 7 abuts against the second spring 8. When the key 9 is inserted into the key sleeve cavity 103 of the inner sleeve 1, the short pin 6 slides stably within the stepped sliding cavity 101 under the elastic action of the second spring 8.

[0034] like Figure 6 As shown, the outer wall of key 9 has 4 (circumferentially distributed) * 2 (axially distributed) first grooves 901. The first grooves 901 are deep grooves, meaning they have a relatively large depth, and they abut against the end of the long pin 3. The outer wall of key 9 also has 4 (circumferentially distributed) * 2 (axially distributed) second grooves 902. The second grooves 902 are shallow grooves, meaning they have a smaller depth, and they abut against the end of the short pin 6. Therefore, key 9 has a total of 16 corresponding grooves. Figure 7 and3 As shown, when the key 9 is inserted into the key sleeve cavity 103 of the inner sleeve 1, each deep groove (first groove 901) abuts against the end of the long pin 3, and each shallow groove (second groove 902) abuts against the end of the short pin 6. At this time, the connection position between the long pin 3 and the short top pin 4 coincides with the connection position between the inner sleeve 1 and the outer shell 2, and the connection position between the short pin 6 and the long top pin 7 coincides with the connection position between the inner sleeve 1 and the outer shell 2. This allows the inner sleeve 1 and the outer shell 2 to rotate relative to each other. Rotating the inner sleeve 1 causes the latch at the end of the inner sleeve 1 to rotate, thereby opening the lock. It should be noted that in this embodiment, the depth of each of the 16 corresponding grooves on the key 9 can be set to be different, so the length between the pin and the top pin is different. This can better ensure the security of the key 9 unlocking. This technical solution also falls within the protection scope of this utility model.

[0035] like Figure 4 and 5 As shown, the inner sleeve 1 has a first rotating boss 102 on its outer wall away from the key 9 inlet, and the outer shell 2 has a second rotating boss 202 on its inner wall away from the key 9 inlet. The recess of the first rotating boss 102 engages with the protrusion of the second rotating boss 202, and the protrusion of the first rotating boss 102 engages with the recess of the second rotating boss 202. Therefore, the rotational position of the inner sleeve 1 can be restricted by the engagement between the first rotating boss 102 and the second rotating boss 202.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the disclosed methods and techniques, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, all equivalent changes made based on the shape, structure, and principle of this utility model without departing from its technical solution should be covered within the protection scope of this utility model.

Claims

1. A pin tumbler lock cylinder, characterized by, It comprises an inner sleeve (1) and an outer shell (2), the inner sleeve (1) is sleeved into the outer shell (2); The inner sleeve (1) is radially slidably connected with a long pin shaft (3), and the outer shell (2) is radially slidably connected with a short pin (4); One end of the long pin shaft (3) extends into the key sleeve cavity (103) of the inner sleeve (1) and abuts against the key (9), and the other end of the long pin shaft (3) abuts against one end of the short pin (4), and the other end of the short pin (4) abuts against the first spring (5); The inner sleeve (1) is radially slidably connected with a short pin shaft (6), and the outer shell (2) is radially slidably connected with a long pin (7), one end of the short pin shaft (6) extends into the key sleeve cavity (103) of the inner sleeve (1) and abuts against the key (9), and the other end of the short pin shaft (6) abuts against one end of the long pin (7), and the other end of the long pin (7) abuts against the second spring (8); The long pin shaft (3) is provided as a T-shaped pin shaft, the short pin shaft (6) is provided as a T-shaped pin shaft, a plurality of stepped sliding cavities (101) are formed in the inner sleeve (1) in the radial direction for the long pin shaft (3) or the short pin shaft (6) to slide, and the small outer diameter shaft of the long pin shaft (3) extends into the key sleeve cavity (103) of the inner sleeve (1) through the small inner diameter cavity of the stepped sliding cavity (101), and the small outer diameter shaft of the short pin shaft (6) extends into the key sleeve cavity (103) of the inner sleeve (1) through the small inner diameter cavity of the stepped sliding cavity (101); The outer shell (2) is provided with a plurality of straight sliding cavities (201) in the radial direction, the first spring (5) and the short pin (4) are matched and located in the same straight sliding cavity (201), and the second spring (8) and the long pin (7) are matched and located in the same straight sliding cavity (201); A first groove (901) is formed in the outer side wall of the key (9), and the first groove (901) abuts against the long pin shaft (3); A second groove (902) is formed in the outer side wall of the key (9), and the second groove (902) abuts against the short pin shaft (6).

2. A lock cylinder as defined in claim 1, wherein A first rotating concave-convex platform (102) is formed in the outer wall of the inner sleeve (1) away from the key (9) inlet, a second rotating concave-convex platform (202) is formed in the inner wall of the outer shell (2) away from the key (9) inlet, the concave part of the first rotating concave-convex platform (102) is matched with the convex part of the second rotating concave-convex platform (202), and the convex part of the first rotating concave-convex platform (102) is matched with the concave part of the second rotating concave-convex platform (202).

3. A lock cylinder as defined in claim 1, wherein The inner sleeve (1) is sleeved into the outer shell (2), and one end of the inner sleeve (1) away from the key (9) inlet extends out of the outer shell (2), a clasp clamping groove (104) is formed in the part of the inner sleeve (1) extending out of the outer shell (2), a clasp (10) is clamped in the clasp clamping groove (104), and the clasp (10) abuts against the end of the outer shell (2).

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