A backpack buckle

Abstract

The application discloses a backpack belt buckle and belongs to the technical field of daily necessities. The backpack belt buckle comprises a buckle body, the buckle body comprises a second limiting block for limiting the length direction of a telescopic belt and a side fixing plate for limiting the width direction of the telescopic belt, a clamping groove is arranged below the second limiting block at intervals, a pushing piece is connected to the bottom of the clamping groove, and the pushing piece and the clamping groove are connected with the side fixing plate. An accommodation cavity with an opening facing the second limiting block is arranged in the clamping groove, a fixed clamping plate fixedly connected with the bottom of the second limiting block is arranged in the accommodation cavity, and a through hole through which the telescopic belt passes is arranged on the fixed clamping plate. The backpack belt buckle solves the problem that it is difficult to adjust the length of the telescopic belt to a proper range, is convenient to use, and is suitable for wide range promotion.

Description

Technical Field

[0001] This invention belongs to the field of daily necessities technology, specifically relating to a backpack strap buckle. Background Technology

[0002] The backpack strap buckle connects a backpack strap and an elastic strap. Both ends of the backpack strap are fixed to the backpack, while the elastic strap is only fixed to the backpack at one end. The backpack strap is not adjustable in length, while the elastic strap is adjustable. In practical applications, the existing backpack strap buckle not only makes it difficult to adjust the length of the elastic strap to a suitable range (especially after the backpack is carried on the shoulder), but also makes adjusting the length of the elastic strap laborious and inconvenient, as detailed below: 1. When it is necessary to adjust the length of the elastic strap, if the elastic strap is too short, the backpack will not be easy to carry on the shoulder; if the elastic strap is too long, it will not be easy to shorten the elastic strap after the backpack is carried on the shoulder, which will make the backpack easy to slip off the shoulder. Therefore, the existing backpack buckle is difficult to adjust the length of the elastic strap to a suitable range. 2. When adjusting the length of the elastic strap, existing backpack buckles generally use methods to increase the friction between the elastic strap and the buckle to prevent the elastic strap from slipping. For example, the surfaces of both the buckle and the elastic strap are made relatively rough, and the friction between the elastic strap and the second horizontal plate needs to be as large as possible (some even have a second vertical plate on the buckle to further increase the friction). In actual use, although the above solution can better secure the elastic strap to the buckle, it increases the difficulty of adjusting the length of the elastic strap, making it more strenuous and inconvenient. Summary of the Invention

[0003] The purpose of this invention is to provide a backpack strap buckle that solves the problems of existing backpack strap buckles having difficulty maintaining the length of the elastic strap within a suitable range, and the fact that adjusting the length of the elastic strap is laborious and inconvenient.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A backpack strap buckle, comprising: The buckle body includes two side fixing plates arranged at intervals, a second limiting block installed at the front end of the buckle body, and a second horizontal plate installed in the middle of the buckle body. The second limiting block and the second horizontal plate are both installed between the two side fixing plates. A belt clamping assembly includes a first limiting component disposed on a second limiting block, a belt guide component installed below the second limiting block and between the two side fixing plates, and a second limiting component connected to the belt guide component, wherein the second limiting component is located between the belt guide component and the first limiting component. The first limiting component is a limiting groove provided on the second limiting block, the belt guide component is a guide block provided below the second limiting block, the second limiting component is a clamping plate connected to the end of the guide block and able to pass through the limiting groove, the telescopic belt contacts the bottom of the guide block, the bottom of the second limiting block contacts the top of the guide block, the second limiting block presses down to fix the clamping plate, and the clamping plate is inserted into the limiting groove; The second horizontal plate is rotatably mounted between the two side fixing plates, and the top of the belt guide assembly is flush with the top of the second horizontal plate.

[0005] In a preferred embodiment of the present invention, the application further includes a guide plate, one end of which rests on the second horizontal plate and the other end is connected to the guide block.

[0006] In a preferred embodiment of the present invention, the guide block has a U-shaped cross-section, the clamping plate, the guide block, and the guide plate are an integral structure, and the clamping plate, the guide block, and the guide plate are all made of elastic material.

[0007] A backpack strap buckle, characterized in that it comprises: The buckle body includes two side fixing plates arranged at intervals, a second limiting block installed at the front end of the buckle body, and a second horizontal plate installed in the middle of the buckle body. The second limiting block and the second horizontal plate are both installed between the two side fixing plates. A belt clamping assembly includes a first limiting component disposed on a second limiting block, a belt guide component installed below the second limiting block and between the two side fixing plates, and a second limiting component connected to the belt guide component, wherein the second limiting component is located between the belt guide component and the first limiting component. The first limiting component is a fixed plate connected to the bottom, and the fixed plate is provided with a through hole for the telescopic belt to pass through; the belt guide component is a slot provided under the second limiting block, and a storage cavity with an opening facing the second limiting block is installed in the slot; the second limiting component is a pusher connected to the bottom of the slot, and both the pusher and the slot are connected to the side fixing plate; the telescopic belt contacts the bottom of the pusher, and when the second limiting block presses down on the fixed plate, the pusher will push the slot upward; The second horizontal plate is rotatably mounted between the two side fixing plates, and the top of the belt guide assembly is flush with the top of the second horizontal plate.

[0008] In a preferred embodiment of the present invention, the card slot, the fixing plate, the pusher and the buckle body are an integral structure, and the card slot is made of elastic plastic.

[0009] In a preferred embodiment of the invention, the pusher includes a first pusher block for providing a pushing force to the slot, the first pusher block being made of elastic plastic.

[0010] In a preferred embodiment of the present invention, the pusher further includes a second pusher block connected to the first pusher block, wherein the first pusher block has a U-shaped structure.

[0011] In a preferred embodiment of the present invention, the fixing plate is vertically connected to the second limiting block.

[0012] In a preferred embodiment of the present invention, the cross-sectional shape of the second limiting block is one of a circle, a rectangle, and a plum blossom shape.

[0013] The beneficial effects of this invention are as follows: Whether the backpack is worn on the shoulder or not, the length of the elastic strap is easier to adjust. This not only solves the problem that current backpack buckles are difficult to adjust the length of the elastic strap to a suitable range, but also makes it more convenient to use and suitable for widespread adoption. Furthermore, this invention does not require a second vertical plate to further increase the friction between the elastic strap and the backpack buckle, nor does it require only backpack buckles and elastic straps with high surface roughness. This invention only requires that the surface roughness of the backpack buckle and elastic strap be appropriate (e.g., the surface roughness inherent in the elastic material itself). Moreover, this invention allows the second horizontal plate to be rotatably mounted on the backpack buckle, thereby reducing the friction between the second horizontal plate and the elastic strap, making it easier and less strenuous to adjust the length of the elastic strap. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an existing backpack buckle; Figure 2 This is a schematic diagram of the backpack buckle structure described in this invention; Figure 3 This is a schematic diagram of the connection structure of the limiting groove, the guide block, the clamping plate, the second limiting block, and the side fixing plate in the first type of belt clamping assembly when the guide block is not subjected to the top thrust. Figure 4 This is a schematic diagram of the connection structure of the limiting groove, the guide block, the clamping plate, the second limiting block, and the side fixing plate in the first type of belt clamping assembly when the guide block is subjected to a pushing force. Figure 5 This is a schematic diagram of the connection structure of the pusher, the fixing plate, the slot, the second limiting block and the side fixing plate in the second type of belt clamping assembly when the pusher is not subjected to a pushing force. Figure 6 This is a schematic diagram of the connection structure of the pusher, the fixing plate, the slot, the second limiting block, and the side fixing plate when the pusher is subjected to a pushing force in the second type of belt clamping assembly.

[0015] Reference numerals in the attached drawings: 1. Buckle body; 11. First horizontal plate; 12. First limiting block; 13. Second horizontal plate; 14. Second limiting block; 15. Side fixing plate; 16. First vertical plate; 17. Second vertical plate; 2. Fixing plate; 21. Through hole; 3. Slot; 31. Storage cavity; 4. Pushing component; 41. First pushing block; 42. Second pushing block; 5. Telescopic belt; 6. Belt clamping assembly; 61. First limiting assembly; 62. Belt guide assembly; 63. Second limiting assembly; 71. Limiting groove; 72. Guide block; 73. Clamping plate; 74. Guide plate. Detailed Implementation

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0017] like Figure 1 As shown in the structural diagram, the existing backpack strap buckle includes a first horizontal plate 11 for connecting the backpack strap, a first limiting block 12 for limiting the backpack strap, a second horizontal plate 13 for connecting the telescopic strap 5, a second limiting block 14 for limiting the telescopic strap 5, and two spaced side fixing plates 15. The first horizontal plate 11, the first limiting block 12, the second horizontal plate 13, and the second limiting block 14 are all installed between the two side fixing plates 15. The lower end of the first limiting block 12 is connected to a first vertical plate 16 for limiting the backpack strap, and the lower end of the second limiting block 14 is connected to a second vertical plate 17 for limiting the telescopic strap 5.

[0018] In actual operation, the first limiting block 12, the first horizontal plate 11, the second horizontal plate 13 and the side fixing plate 15 are arranged sequentially from front to back (from left to right in the figure) on the backpack strap buckle. The gap between the first horizontal plate 11 and the first limiting block 12 is the first gap, the gap between the first horizontal plate 11 and the second horizontal plate 13 is the second gap, and the gap between the second horizontal plate 13 and the second limiting block 14 is the third gap.

[0019] When the backpack strap buckle is installed on the backpack, one end of the backpack strap is connected to the backpack, and the other end passes through the first gap and the second gap in sequence before being connected to the backpack again. At this time, when the backpack strap passes through the first vertical plate 16, the backpack strap is located below the first vertical plate 16. One end of the telescopic strap 5 is connected to the backpack, and the other end passes through the second gap and the third gap in sequence. At this time, the other end (unreserved end) of the telescopic strap 5 is in a free and unreserved state, and when the telescopic strap 5 passes through the second vertical plate 17, the telescopic strap 5 is located below the second vertical plate 17.

[0020] Therefore, since both ends of the backpack straps are fixed to the backpack, their length is not adjustable. However, since only one end of the elastic strap 5 is fixed to the backpack, and the other end is unattached, its length is adjustable. In practical application, if the elastic strap 5 is shortened, the backpack is difficult to carry on the shoulder; if it is lengthened, it is difficult to shorten again after the backpack is carried, making the backpack inconvenient to use and prone to slipping off the shoulder.

[0021] Therefore, the existing backpack strap buckles are not very good at adjusting the length of the elastic strap 5 to a suitable range (especially after the backpack is carried on people's shoulders), and it is necessary to improve this.

[0022] To address the aforementioned problems, this application provides a backpack buckle designed to solve the issues of existing backpack buckles. The buckle includes: a buckle body 1, comprising two spaced-apart side fixing plates 15, a second limiting block 14 mounted at the front end of the buckle body 1, and a second horizontal plate 13 mounted in the middle of the buckle body 1, wherein the second limiting block 14 and the second horizontal plate 13 are both mounted between the two side fixing plates 15; and a strap clamping assembly 6, comprising a first limiting component 61 disposed on the second limiting block 14, a strap guide component 62 mounted below the second limiting block 14 and between the two side fixing plates 15, and a second limiting component 63 connected to the strap guide component 62, wherein the second limiting component 63 is located between the strap guide component 62 and the first limiting component 61; the second horizontal plate 13 is rotatably mounted between the two side fixing plates 15, and the top of the strap guide component 62 is flush with the top of the second horizontal plate 13.

[0023] In practical applications, compared to existing backpack strap buckles, this application eliminates the need for a second vertical plate 17, further reducing manufacturing costs; simultaneously, as Figure 2 and Figure 3As shown, this application mainly adds a first limiting component 61, a strap guide component 62, and a second limiting component 63 to the existing second limiting block 14, so that people can adjust the length of the elastic strap 5 on the backpack strap buckle to a suitable range. At the same time, since the aforementioned first limiting component 61, strap guide component 62, and second limiting component 63 do not affect the aesthetics of the backpack strap buckle, this application still has strong market value.

[0024] This application provides various structural arrangements of belt clamping components 6, wherein the first type of belt clamping component 6 includes: a first limiting component 61 which is a limiting groove 71 disposed on a second limiting block 14, a belt guiding component 62 which is a guide block 72 disposed below the second limiting block 14, and a second limiting component 63 which is a clamping plate 73 connected to the end of the guide block 72 and passable through the limiting groove 71.

[0025] Preferably, the guide block 72 has a U-shaped cross-section, and the clamping plate 73, guide block 72, and guide plate 74 are an integral structure, all made of elastic material. Furthermore, this application also includes a guide plate 74, one end of which rests on the second horizontal plate 13, and the other end is connected to the guide block 72, and the guide plate 74 is an integral structure with the guide block.

[0026] Thus, this application realizes the structural design of the first type of belt clamping assembly 6. In actual operation, the working principle of the first type of belt clamping assembly 6 is as follows: When the backpack strap buckle is installed on the backpack, one end of the backpack strap is connected to the backpack, and the other end passes through the first gap and the second gap in sequence and is connected to the backpack. At this time, when the backpack strap passes through the first vertical plate 16, the backpack strap is located below the first vertical plate 16. This part of the structure is the same as the existing technical solution, and will not be described in detail here. When the backpack strap buckle needs to be installed on the backpack, one end of the telescopic strap 5 is connected to the backpack, and the other end passes through the second gap and the third gap in sequence and enters below the second limiting block 14. Then, the other end (empty end) of the telescopic strap 5 covers the clamping plate 73 and passes through the front end of the second limiting block 14 until it is in a free and unoccupied state.

[0027] At this time, the limiting groove 71, the guide block 72 and the clamping plate 73 are all in a natural resting state (without any force between them), and people can easily and quickly let the other end of the telescopic belt 5 pass through the gap formed by the second limiting block 14 and the guide block 72, thereby completing the installation of the telescopic belt 5.

[0028] At this time, if a backpack with the backpack buckle described in this application is carried on a person's shoulder and the length of the telescopic strap 5 needs to be adjusted, the person can directly adjust the length of the telescopic strap 5 like an existing backpack buckle. Specifically, since the clamping plate 73 is located below the second limiting block 14 and the top of the clamping plate 73 is parallel to the guide block 72, the guide block 72 does not exert force on the clamping plate 73, and the telescopic strap 5 is not inserted into the limiting groove 71. Therefore, the limiting groove 71, the guide block 72, and the clamping plate 73 will not exert a large force on the telescopic strap 5 at this time, nor will they affect the free extension and retraction of the telescopic strap 5. Therefore, the person can directly adjust the length of the telescopic strap 5 like an existing backpack buckle.

[0029] When a backpack with the buckle described in this application is worn on the shoulder, and if the telescopic strap 5 is in a naturally resting state, the telescopic strap 5 will contact the bottom of the guide block 72, the bottom of the second limiting block 14 will contact the top of the guide block 72, and the second limiting block 14 will press down (from the limiting groove 71 towards the guide block 72) against the fixing plate 2, and the clamping plate 73 will be inserted into the limiting groove 71 (e.g., Figure 3 As shown), a portion of the telescopic belt 5 will be clamped in an inverted U-shape within the limiting groove 71, thus making the length of the telescopic belt 5 more difficult to adjust.

[0030] When a backpack with the backpack buckle described in this application is carried on a person's shoulder, and if the telescopic strap 5 is in an upward pulling state, (the person operates) the telescopic strap 5 to pull the backpack buckle upward. At this time, as shown in the figure, the clamping plate 73 is not inserted into the limiting groove 71, and the person can freely adjust the length of the telescopic strap 5.

[0031] The second type of belt clamping assembly 6 can be arranged as follows: the first limiting assembly 61 is a fixed clamping plate 2 connected to the bottom, and the fixed clamping plate 2 is provided with a through hole 21 for the telescopic belt 5 to pass through; the belt guiding assembly 62 is a groove 3 provided under the second limiting block 14, and a receiving cavity 31 with an opening facing the second limiting block 14 is installed in the groove 3; the second limiting assembly 63 is a pusher 4 connected to the bottom of the groove 3, and both the pusher 4 and the groove 3 are connected to the side fixing plate 15.

[0032] In actual operation, the working principle of the second type of belt clamping component 6 is as follows: When the backpack strap buckle is installed on the backpack, one end of the backpack strap is connected to the backpack, and the other end passes through the first gap and the second gap in sequence and is connected to the backpack. At this time, when the backpack strap passes through the first vertical plate 16, the backpack strap is located below the first vertical plate 16. This part of the structure is the same as the existing technical solution, and will not be described in detail here. When the backpack strap buckle needs to be installed on the backpack, one end of the telescopic strap 5 is connected to the backpack, and the other end first passes through the second gap and the third gap in sequence and enters below the second limiting block 14. Then, the other end (empty end) of the telescopic strap 5 enters from one end of the upper part of the slot 3, passes through the through hole 21 inside the fixing plate 2, and exits from the other end of the upper part of the slot 3 until it finally passes through the second limiting block 14 and is in a free and empty state.

[0033] At this time, the pusher 4, the slot 3 and the fixing plate 2 are all in a natural resting state (without any force between them). The through hole 21 inside the fixing plate 2 and the top (top surface) of the slot 3 are parallel (as shown in the figure). People can easily and quickly let the other end of the telescopic belt 5 pass through the through hole 21 inside the fixing plate 2, thereby completing the installation of the telescopic belt 5.

[0034] At this time, if a backpack with the backpack buckle described in this application is carried on a person's shoulder and the length of the telescopic strap 5 needs to be adjusted, the person can adjust the length of the telescopic strap 5 directly like an existing backpack buckle. Specifically, since the through hole 21 inside the fixing plate 2 and the top (top surface) of the slot 3 are parallel, the pushing member 4 does not exert force on the slot 3, and the telescopic strap 5 is not inserted into the slot 3. Therefore, the slot 3, the fixing plate 2, and the pushing member 4 will not exert a large force on the telescopic strap 5 at this time, nor will they affect the free extension and retraction of the telescopic strap 5. Therefore, the person can adjust the length of the telescopic strap 5 directly like an existing backpack buckle.

[0035] When a backpack with the backpack buckle described in this application is carried on a person's shoulder, and if the telescopic strap 5 is in a natural resting state, the telescopic strap 5 will contact the bottom of the pusher 4. The second limiting block 14 will press down (from the slot 3 to the pusher 4) to fix the locking plate 2, and the pusher 4 will push the slot 3 upward. In this way, a part of the telescopic strap 5 will be locked in the slot 3 in a U-shape, so that the telescopic strap 5 is locked, making it even more difficult to adjust the length of the telescopic strap 5.

[0036] When a backpack with the backpack buckle described in this application is carried on a person's shoulder, and if the telescopic strap 5 is in an upward pulling state, (the person operates) the telescopic strap 5 to pull the backpack buckle upward. At this time, as shown in the figure, the pusher 4 does not exert force on the slot 3, and the telescopic strap 5 does not engage with the slot 3. Therefore, the person can freely adjust the length of the telescopic strap 5.

[0037] In summary, this application makes it easier to adjust the length of the elastic strap 5 both before and after the backpack is put on the shoulder. It not only solves the problem that current backpack strap buckles are difficult to adjust the length of the elastic strap 5 to a suitable range, but is also more convenient to use and suitable for widespread promotion.

[0038] In actual work, this application provides two implementations of the card slot 3. The first implementation of the card slot 3 is as follows: the card slot 3, the fixing plate 2, the pusher 4 and the buckle body 1 are an integral structure, and the card slot 3 is made of elastic plastic.

[0039] Preferably, the fixing plate 2, the pushing member 4, and the buckle body 1 are also made of elastic material. Thus, this application can directly utilize the elasticity and automatic return function of the card slot 3, simply, conveniently, and quickly enabling the card slot 3 to achieve the following two functions: When the slot 3 is not subjected to the force from the second limiting block 14 or the pushing member 4, the slot 3 is in a natural resting state. At this time, people can conveniently and quickly adjust the length of the telescopic strap 5. At this time, the backpack strap buckle can be placed on the table (the backpack is not carried on the shoulder), or the telescopic strap 5 can be pulled upward (the backpack is carried on the shoulder). When the slot 3 is subjected to pressure from the second limiting block 14 or the pushing force of the pushing member 4 (such as pressing down on the second limiting block 14 or pushing up on the pushing member 4), the lower end of the fixed plate 2 enters the slot 3, and the telescopic belt 5 is installed in the slot 3 in a U-shape. At this time, people can conveniently and quickly adjust the length of the telescopic belt 5. The pusher 4 includes a first pusher block 41 for providing a pushing force to the slot 3. The first pusher block 41 is made of elastic plastic. In actual operation, the first pusher block 41 can be a block structure or a U-shaped bayonet structure.

[0040] The pusher 4 also includes a second pusher 42 connected to the first pusher 41, the first pusher 41 having a U-shaped structure. In this way, the application realizes the arrangement of the pusher 4. The cross-sectional shape of the pusher 4 can be S-shaped or hook-shaped (preferably hook-shaped, as shown in the figure). The pusher 4 not only makes it easier for people to apply force to the slot 3, but also makes the application more aesthetically pleasing.

[0041] In actual operation, the second type of slot 3 is implemented as follows: the slot 3 can be slidably installed on the side fixing plate 15. The side fixing plate 15 and the slot 3 are made of rigid materials (such as rigid plastic or steel). A sliding limiting component is connected between the slot 3 and the side fixing plate 15.

[0042] In this way, under the action of the pusher 4 and the sliding limit component mentioned above, the pusher 4 can realize the upward push function of the slot 3. At this time, the pusher 4 and the buckle body 1 can be formed by assembly structure. The pusher 4 can be made of elastic material or hard material. For example, when the pusher 4 is made of steel, the middle part of the pusher 4 is rotatably installed on the side fixing plate 15, and the two ends of the pusher 4 can rotate automatically.

[0043] The sliding limiting assembly (not shown in the figure) includes a sliding limiting plate (not shown in the figure) connected to the outer wall of the slot 3, and a limiting slide rail (not shown in the figure) disposed on the side fixing plate 15. The sliding limiting plate is slidably disposed within the limiting slide rail. Under the combined action of the sliding limiting plate and the limiting slide rail, this application realizes the arrangement of the sliding limiting assembly, thereby allowing the pushing member 4 to perform the upward pushing function on the slot 3. The above-mentioned sliding limiting assembly is a conventional technical solution in this field and will not be described in detail here.

[0044] Furthermore, the fixing plate 2 is vertically connected to the second limiting block 14 to make the installation of this application more convenient and quick.

[0045] Furthermore, the cross-sectional shape of the second limiting block 14 is one of a circle, a rectangle, or a quincunx shape. In actual operation, the cross-sectional shape of the second limiting block 14 can be freely chosen from one of the above three shapes. However, in order to reduce the friction between the telescopic belt 5 and the second limiting block 14, the cross-sectional shape of the second limiting block 14 is a circle or a quincunx shape, preferably a circle.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A backpack strap buckle, characterized in that, It includes: The buckle body includes two side fixing plates arranged at intervals, a second limiting block installed at the front end of the buckle body, and a second horizontal plate installed in the middle of the buckle body. The second limiting block and the second horizontal plate are both installed between the two side fixing plates. A belt clamping assembly includes a first limiting component disposed on a second limiting block, a belt guide component installed below the second limiting block and between the two side fixing plates, and a second limiting component connected to the belt guide component, wherein the second limiting component is located between the belt guide component and the first limiting component. The first limiting component is a limiting groove set on the second limiting block, the belt guide component is a guide block set below the second limiting block, the second limiting component is a clamping plate connected to the end of the guide block and able to pass through the limiting groove, the telescopic belt contacts the bottom of the guide block, the bottom of the second limiting block contacts the top of the guide block, the second limiting block is pressed down, the clamping plate is inserted into the limiting groove, a part of the telescopic belt will be clamped in the limiting groove in an inverted U-shape, so that the telescopic belt is clamped, the telescopic belt is pulled up to pull the backpack buckle, at this time, the clamping plate is not inserted into the limiting groove; The second horizontal plate is rotatably mounted between the two side fixing plates, and the top of the belt guide assembly is flush with the top of the second horizontal plate.

2. The backpack strap buckle according to claim 1, characterized in that: It also includes a guide plate, one end of which rests on the second horizontal plate and the other end is connected to the guide block.

3. A backpack strap buckle according to claim 2, characterized in that: The guide block has a U-shaped cross-section, and the clamping plate, the guide block, and the guide plate are an integral structure, all of which are made of elastic material.

4. A backpack strap buckle, characterized in that, It includes: The buckle body includes two side fixing plates arranged at intervals, a second limiting block installed at the front end of the buckle body, and a second horizontal plate installed in the middle of the buckle body. The second limiting block and the second horizontal plate are both installed between the two side fixing plates. A belt clamping assembly includes a first limiting component disposed on a second limiting block, a belt guide component installed below the second limiting block and between the two side fixing plates, and a second limiting component connected to the belt guide component, wherein the second limiting component is located between the belt guide component and the first limiting component. The first limiting component is a fixed plate connected to the bottom, and the fixed plate is provided with a through hole for the telescopic belt to pass through; the belt guide component is a slot provided under the second limiting block, and a storage cavity with its opening facing the second limiting block is installed in the slot; the second limiting component is a pusher connected to the bottom of the slot, and both the pusher and the slot are connected to the side fixing plate; when the telescopic belt contacts the bottom of the pusher, the second limiting block presses down on the fixed plate, and the pusher pushes the slot upward, a portion of the telescopic belt is U-shaped and clamped in the slot, so that the telescopic belt is clamped; when the telescopic belt is pulled upward to pull up the backpack strap buckle, at this time, the pusher does not exert force on the slot, and the telescopic belt is not clamped into the slot; The second horizontal plate is rotatably mounted between the two side fixing plates, and the top of the belt guide assembly is flush with the top of the second horizontal plate.

5. A backpack strap buckle according to claim 4, characterized in that: The slot, fixing plate, pusher and buckle body are an integral structure, and the slot is made of elastic plastic.

6. A backpack strap buckle according to claim 5, characterized in that: The pusher includes a first pusher block for providing a pushing force to the slot, the first pusher block being made of elastic plastic.

7. A backpack strap buckle according to claim 6, characterized in that: The jacking component also includes a second jacking block connected to the first jacking block, the first jacking block having a U-shaped structure.

8. A backpack strap buckle according to claim 7, characterized in that: The fixing plate is perpendicularly connected to the second limiting block.

9. A backpack strap buckle according to claim 8, characterized in that: The cross-sectional shape of the second limiting block is one of a circle, a rectangle, or a plum blossom shape.

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