Back width adjusting device and backpack

Abstract

The utility model discloses a back width adjusting device and a knapsack, and the back width adjusting device comprises a fixed seat which is provided with a slide way, and two side walls of the fixed seat are provided with clamping grooves; the clamping groove is provided with a gear groove. The two ends of the sliding piece can clamp the walls of the clamping grooves to slide in the clamping grooves. An operation member; the telescopic piece assembly is composed of two telescopic pieces. The two ends of the telescopic piece clamp the groove wall of the clamping groove, and the extending-in end, extending into the clamping groove, of the telescopic piece is matched with the gear groove and stopped at the first position in the gear groove to be locked. When the stretching-in end of the telescopic piece is located at a second position away from the gear groove, the telescopic piece enters an unlocking state; a spring groove is formed in each telescopic piece; the elastic piece is arranged in the spring groove, one end of the elastic piece abuts against the sliding piece, the other end of the elastic piece abuts against the groove bottom of the spring groove, and elastic force is applied to the telescopic piece so that the telescopic piece can stop at the first position in the gear groove. According to the back width adjusting device and the backpack, the backpack is provided with the back width adjusting device, the position of the back width can be adjusted according to the individual requirement of a user, and the bearing pressure is relieved.

Description

Technical Field

[0001] The utility model relates to the field of backpack design, in particular to a back width adjusting device and a backpack. Background Art

[0002] With the increasing attention paid to children's health in modern society, children's backpacks, as an indispensable equipment for children's daily study and life, are gradually receiving attention for their design and functionality. Especially for growing children, their height changes frequently and their bodies develop rapidly, which makes it difficult for traditional fixed-size backpacks to meet their needs. Although traditional fixed-size backpacks are designed with the height range of most children in mind, children's heights vary greatly and their heights change significantly as they age. Therefore, fixed-size backpacks often cannot adapt to the personalized needs of each child, causing children to face discomfort, instability, and even physical health problems during the carrying process. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology and to provide a back width adjustment device and a backpack. The backpack is equipped with a back width adjustment device, which can adjust the back width position according to the personalized needs of the user, thereby effectively reducing the pressure when carrying.

[0004] To achieve the above objectives, each embodiment of the present invention adopts the following technical solutions but is not limited to the following solutions:

[0005] The first technical scheme relates to a back width adjustment device, which is used to adjust the position of the back width on a backpack, and includes: a fixed seat, which is provided with a slide extending in a first direction, and the two side walls of which are provided with a slot extending in the first direction; the slot is provided with a plurality of evenly spaced gear slots along its extension direction, and a partition wall is provided between adjacent gear slots; the gear slots are symmetrically distributed and one-to-one corresponding in the slots on both sides of the fixed seat; a sliding member, at both ends of which are provided with a clamping structure that can clamp the slot wall of the slot, so that the sliding member slides in the slot along the first direction; at the same time, the sliding member and the fixed seat slide in cooperation with each other along the slide in the first direction; an operating member, which is movably mounted on the outside of the sliding member and is suitable for pressing in a second direction perpendicular to the first direction; a telescopic member assembly, which is composed of two telescopic members, which are built into the sliding member, and the two telescopic members respectively abut against the two sides of the operating member; the telescopic member assembly is suitable for being slidably connected with the sliding member in a third direction perpendicular to both the first direction and the second direction or in its extension direction; the two ends of the telescopic member clamp the slot wall of the slot and extend into the slot The extending end in the telescopic member is adapted to the gear slot and stops at the first position in the gear slot for locking; when the extending end of the telescopic member is in the second position out of the gear slot, the telescopic member enters the unlocked state, and the telescopic member and the sliding member are suitable for sliding together in the card slot along the first direction; each of the telescopic members is provided with a spring slot; and an elastic member is installed in the spring slot, one end of which abuts against the sliding member and the other end abuts against the bottom of the spring slot to apply elastic force to the telescopic member, so that the telescopic member can stop at the first position in the gear slot when not subjected to external force. The first position is defined as follows: the first position is defined as follows: the first position is defined as follows: the first position is defined as follows: the first position is defined as follows: the second position is defined as follows: the first position is defined as follows: the second position is defined as follows: the first position is defined as follows: the second position is defined as follows: the first position is defined as follows: the second position is defined as follows: the first position is defined as follows: the second position is defined as follows:

[0006] The second technical solution is based on the first technical solution, wherein the operating member is provided with a first mating surface and a second mating surface facing each other, the first mating surface and the second mating surface are both inclined surfaces gradually approaching along the second direction, and the first mating surface and the second mating surface respectively cooperate with the contact surface inclined surfaces of the two telescopic members.

[0007] The third technical solution is based on the second technical solution, wherein the telescopic member is provided with a slide groove extending along a third direction, and the sliding member is provided with a slide rod that slides in the slide groove; a sliding space is provided between the slide rod and the bottom of the slide groove.

[0008] The fourth technical solution is based on the third technical solution, wherein the end face of the partition wall of the telescopic member close to the gear slot is provided with a first guide angle, and the partition wall is provided with a second guide angle matched with the first guide angle inclined surface.

[0009] The fifth technical solution is based on the first technical solution, wherein the sliding member is also provided with a cover plate, and the cover plate is provided with a clearance space matching the operating member so that the operating member can be pressed along the second direction; a gap is provided between the cover plate and the sliding member to allow the corresponding part of the back panel to pass through and be placed in the gap.

[0010] The sixth technical solution is based on the fifth technical solution, wherein a groove recessed toward the interior of the fixed seat is provided in the middle of the slideway of the fixed seat, and the groove is connected to the slideway; and the sliding member is provided with a sliding end slidably matched with the groove.

[0011] The seventh technical solution is based on any one of the first to sixth technical solutions, wherein a backpack comprises a backpack body, a back width, shoulder straps and an adjustment device, wherein the adjustment device adopts the above-mentioned back width adjustment device; the back width is movably connected to the backpack body, and the adjustment device is fixed to the backpack body for controlling the position of the back width on the backpack body; one end of the shoulder strap is fixed to the backpack body, and the other end is fixed to the back width.

[0012] The eighth technical solution is based on the seventh technical solution, which also includes a connecting belt, which is a U-shaped belt. The bottom and both ends of the U-shaped belt are fixedly connected to the back side of the backpack body close to the back panel. The back panel passes through both sides of the U-shaped belt and forms a movable connection with the backpack body through an adjustment device.

[0013] The ninth technical solution is based on the eighth technical solution, wherein the adjustment device is built between the backpack body and the back panel, and the operating member and the cover plate are exposed on a side of the back panel away from the backpack body, and the fixing seat is fixedly connected to the backpack body.

[0014] The tenth technical solution is based on the ninth technical solution, wherein a plurality of in-position marks are provided on a side of the backpack body close to the back panel, and the back panel moves along the first direction and exposes the in-position marks to prompt the release of the operating member, so that the telescopic member assembly stops at the first position for locking.

[0015] From the above description of the various embodiments of the present invention, it can be seen that, compared with the prior art, the various embodiments of the present invention have the following beneficial effects:

[0016] In the first technical solution and related embodiments, the telescopic member assembly in the device cooperates with the gear slot in the card slot to achieve the height adjustment of the backpack back width. The telescopic member is built into the sliding member, and the two ends clamp the slot wall of the card slot. When the inserted end rests in the gear slot, it is locked by the elastic force of the elastic member to ensure the stability of the backpack back width. The user can easily press the operating member to slide the telescopic member assembly to the second position, thereby releasing the locked state with the gear slot. This operation method is simple and intuitive, and is convenient for users to make quick adjustments. When the sliding member assembly slides along the first direction and crosses the partition wall to the top of the adjacent gear slot, the operating member is released, and the elastic force of the elastic member will cause the telescopic member to slide to the first position and re-enter the adjacent gear slot to dock and lock. Due to the uniform spacing of the gear slots in the card slot, the device can adapt to the body shape and needs of different users and provide personalized backpack back width adjustment.

[0017] In the second technical solution and related embodiments, the design of the operating member introduces a first mating surface and a second mating surface, both of which are inclined surfaces that gradually approach each other along the second direction. When the user presses the operating member along the second direction, the first mating surface and the second mating surface of the operating member will act on the contact surface inclined surfaces of the two telescopic members respectively, thereby converting the original pressing force along the second direction into a thrust along the third direction or its extension direction, so that the telescopic member can smoothly disengage from the gear slot and unlock the current position.

[0018] In the third technical solution and related embodiments, the slide groove extending along the third direction on the telescopic member cooperates with the slide rod on the sliding member to form a stable sliding mechanism, which not only ensures that the telescopic member slides smoothly and stably in the slide groove along the third direction or its extension direction, but also improves the stability and smoothness of the telescopic member during movement, effectively avoiding unnecessary resistance caused by friction or jamming. The appropriate sliding space left between the slide rod and the bottom of the slide groove ensures that the telescopic member has sufficient range of motion during the adjustment process, so that it can easily switch between the locked and unlocked states.

[0019] In the fourth technical solution and related embodiments, the design of the guide angle of the inclined plane between the telescopic member and the partition wall improves the operational flexibility of the adjustment device. Even if the operating member is not fully pressed down, the inclined plane cooperation of the first guide angle and the second guide angle can effectively guide the telescopic member so that it can smoothly escape the locked state of the gear slot. Once out of the locked state, the telescopic member can slide freely in the slot along the first direction to enter the position adjustment state.

[0020] In the fifth technical solution and related embodiments, the gap between the cover plate and the sliding member not only provides ample space for the corresponding part of the back panel to smoothly pass through and be firmly placed in the gap, but also realizes the close fit between the back panel and the adjustment device. At the same time, the cover plate and the operating member are installed on the outside of the back panel, which is convenient for the user's operation. The clearance space on the cover plate ensures that the operating member can smoothly press along the second direction without obstacles. In addition, since the cover plate and the sliding member are fixedly connected, the user only needs to simply operate the back panel along the first direction to easily drive the cover plate and the sliding member to slide along the first direction to achieve position adjustment.

[0021] In the sixth technical solution and related embodiments, a groove that is recessed into the interior of the fixed seat is provided in the middle of the slide of the fixed seat and is connected to the slide, allowing the operating member to sink to a deeper depth during the pressing process, ensuring that the telescopic member can smoothly reach the second position.

[0022] In the seventh technical solution and related embodiments, the backpack design improves the flexibility and adaptability of the backpack by introducing a back width adjustment device. The back width and the backpack body are connected in a removable manner, and the position of the back width on the backpack body is controlled by an adjustment device, so that the backpack can be personalized according to different usage scenarios and individual needs. One end of the shoulder strap is firmly connected to the backpack body, and the other end is connected to the back width. By adjusting the position of the back width, the effective length and angle of the shoulder strap can also be adjusted accordingly. This design is based on ergonomic principles, so that the backpack can fit the user's back and shoulders closely, providing the best carrying experience for children. In particular, for children of different heights, the backpack can be easily adjusted to ensure that the weight of the backpack can be evenly distributed on the child's back and shoulders, effectively reducing the carrying pressure and preventing the physical burden caused by improper backpacking.

[0023] In the eighth technical solution and related embodiments, a U-shaped belt is used as the connecting belt, and its bottom and both ends are firmly connected to the back of the backpack body near the back panel, ensuring a stable connection between the connecting belt and the backpack body. This design not only provides stable support for the back panel, but also enables the back panel to flexibly pass through both sides of the U-shaped belt, and can be adjusted on the backpack body, thereby enhancing the adaptability of the backpack to users of different heights.

[0024] In the ninth technical solution and related embodiments, by embedding the adjustment device between the backpack body and the back panel, the protruding parts on the outside of the backpack are effectively reduced, making the backpack more concise and beautiful. At the same time, the operating member and the cover are located on the outside of the back panel, which is convenient for users to operate and adjust.

[0025] In the tenth technical solution and related embodiments, the in-position mark provides an intuitive visual prompt for the user, making it easy for the user to know when to release the operating member, and helping the user understand the current position of the back panel and whether further adjustment is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a side schematic diagram of the back width adjustment device of the embodiment;

[0028] Figure 2 for Figure 1 AA section view;

[0029] Figure 3 This is a front schematic diagram of the back width adjustment device of the embodiment;

[0030] Figure 4 This is a schematic diagram of the back side of the back width adjustment device of the embodiment;

[0031] Figure 5 It is a schematic diagram of a sliding member, a telescopic member assembly and an operating member in an embodiment;

[0032] Figure 6 It is a side view of the fixing seat of the embodiment;

[0033] Figure 7 Schematic diagram of the operating member and cover plate of the embodiment;

[0034] Figure 8 is a schematic diagram of an embodiment backpack;

[0035] Fig. 9 This is a schematic diagram of the first arrival mark of the backpack in the embodiment;

[0036] Fig.10 Schematic diagram of the second arrival mark of the backpack in the embodiment.

[0037] Description of main reference numerals:

[0038] Backpack body 1; back panel 2; shoulder strap 3; fixed seat 4; sliding member 5; operating member 6; telescopic member 7; cover plate 8; back plate 9; first in-position mark 10; second in-position mark 11; slideway 12; groove 13; sliding end 14; slot 15; gear slot 16; partition wall 17; spring slot 18; insertion end 19; gap 20; first guide angle 21; second guide angle 22; slide slot 23; slide rod 24; screw 25; first mounting hole 26; second mounting hole 27; third mounting hole 28; first mating surface 29; second mating surface 30. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0040] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0041] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0042] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0043] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0044] See also Figures 1 to 10 ,like Figures 1 to 7 As shown, a back width adjustment device is used to adjust the position of the back width 2 on a backpack, and comprises a fixing seat 4, a sliding member 5, an operating member 6, a telescopic member assembly and an elastic member.

[0045] Fixed seat 4, such as Figure 3 As shown, it is provided with a slideway 12 extending along the first direction, and a groove 13 is provided in the middle of the slideway 12 and is recessed toward the inside of the fixing seat 4, and the groove 13 is connected to the slideway 12. Figure 5 As shown, the two side walls of the fixing seat 4 are provided with a slot 15 extending in a first direction; the slot 15 is provided with a plurality of evenly spaced shift slots 16 along its extending direction, and a partition wall 17 is provided between adjacent shift slots 16; the shift slots 16 are symmetrically distributed and one-to-one corresponding in the slots 15 on both sides of the fixing seat 4. In this embodiment, the number of the shift slots 16 is two. Figure 4 As shown, the back of the fixing seat 4 is provided with a back plate 9 , and the back plate 9 is provided with three first mounting holes 26 for fixedly connecting with the backpack body 1 .

[0046] Sliding member 5, such as Figure 1 and Figure 2 As shown, a clamping structure capable of clamping the slot wall 15 is provided at both ends thereof, so that the sliding member 5 slides in the slot 15 along the first direction; at the same time, the sliding member 5 and the fixing seat 4 slide in cooperation with each other along the slideway 12 in the first direction. Figure 1 As shown, the sliding member 5 is provided with a sliding end 14 that slides with the groove 13. Figure 1 , Figure 3 and Figure 7 As shown, the slide 5 comprises a cover plate 8 .

[0047] Operating element 6, such as Figure 5 and Figure 7 As shown, it is movably mounted on the outside of the sliding member 5 and is suitable for pressing along a second direction perpendicular to the first direction. Figure 7 As shown, the operating member 6 is provided with a first mating surface 29 and a second mating surface 30 facing each other, and the first mating surface 29 and the second mating surface 30 are both inclined surfaces gradually approaching each other along the second direction. In this embodiment, the bottom of the operating member 6 is a trapezoidal structure, and the first mating surface 29 and the second mating surface 30 are two inclined surfaces in contact with the telescopic member assembly.

[0048] like Figure 1 , Figure 3 and Figure 7 As shown, the cover plate 8 is provided with a clearance space matching the operating member 6 so that the operating member 6 can be pressed along the second direction; Figure 1 and Figure 8 As shown, a gap 20 is provided between the cover plate 8 and the sliding member 5, so that the corresponding part of the back panel 2 can pass through and be placed in the gap 20. Specifically, as Figure 7 As shown, the cover plate 8 is provided with four screws 25 along the peripheral wall. Figure 2 As shown, the sliding member 5 is provided with four second mounting holes 27 for the connection of the cover plate 8. The gap 20 provided between the cover plate 8 and the sliding member 5 not only provides ample space for the corresponding part of the back frame 2 so that it can smoothly pass through and be firmly placed in the gap 20, but also realizes the close fit between the back frame 2 and the adjusting device. At the same time, the cover plate 8 and the operating member 6 are installed on the outside of the back frame 2, which is convenient for the user's operation. The clearance space on the cover plate 8 ensures that the operating member 6 can be smoothly pressed along the second direction without obstacles. In addition, since the cover plate 8 and the sliding member 5 are fixedly connected, the user only needs to simply operate the back frame 2 along the first direction to easily drive the cover plate 8 and the sliding member 5 to slide along the first direction to achieve position adjustment.

[0049] Telescopic components, such as Figure 2 and Figure 5 As shown, it is composed of two telescopic members 7, which are built into the sliding member 5, and the two telescopic members 7 are respectively against the two sides of the operating member 6; the telescopic member assembly is suitable for being slidably connected with the sliding member 5 in a third direction perpendicular to both the first direction and the second direction or in its extending direction; the two ends of the telescopic member 7 clamp the groove wall of the card slot 15, and the insertion end 19 inserted into the card slot 15 is adapted to the gear slot 16 and docked in the first position in the gear slot 16 for locking; when the insertion end 19 of the telescopic member 7 is in the second position away from the gear slot 16, the telescopic member 7 enters the unlocked state, and the telescopic member 7 and the sliding member 5 are suitable for sliding together in the card slot 15 along the first direction; a spring groove 18 is provided in each telescopic member 7. Specifically, the telescopic member assembly is installed inside the sliding member 5, as shown in FIG. Figure 2 and Figure 5 As shown, four third mounting holes 28 are provided around the outer frame of the sliding member 5 to prevent the telescopic member assembly from falling off.

[0050] like Figure 2 and Figure 5 As shown, the telescopic member 7 is provided with a slide groove 23 extending along the third direction, and the sliding member 5 is provided with a slide rod 24 that slides in the slide groove 23; a sliding space is provided between the slide rod 24 and the bottom of the slide groove 23. The slide groove 23 extending along the third direction on the telescopic member 7 cooperates with the slide rod 24 on the sliding member 5 to form a stable sliding mechanism, which not only ensures that the telescopic member 7 slides smoothly and stably in the slide groove 23 along the third direction or its extension direction, but also improves the stability and smoothness of the telescopic member 7 during movement, and effectively avoids unnecessary resistance caused by friction or jamming. The appropriate sliding space left between the slide rod 24 and the bottom of the slide groove 23 ensures that the telescopic member 7 has sufficient range of motion during the adjustment process, so that it can easily switch between the locked and unlocked states.

[0051] like Figure 5As shown, the first mating surface 29 and the second mating surface 30 of the operating member 6 respectively mate with the contact surface slopes of the two telescopic members 7. The design of the operating member 6 introduces the first mating surface 29 and the second mating surface 30, both of which are slopes that gradually approach each other along the second direction. When the user presses the operating member 6 along the second direction, the first mating surface 29 and the second mating surface 30 of the operating member 6 will act on the contact surface slopes of the two telescopic members 7 respectively, thereby converting the pressing force originally along the second direction into a thrust along the third direction or its extension direction, so that the telescopic member 7 can smoothly disengage from the gear slot 16 and unlock the current position.

[0052] In this embodiment, Figure 3 As shown, by providing a groove 13 sunken into the interior of the fixing seat 4 in the middle of the slideway 12 of the fixing seat 4 and connected to the slideway 12, the operating member 6 is allowed to sink to a deeper depth during the pressing process, ensuring that the telescopic member 7 can smoothly reach the second position.

[0053] like Figure 2 and Figure 5 As shown, the end surface of the partition wall 17 of the telescopic member 7 close to the gear slot 16 is provided with a first guide angle 21, as shown in FIG. Figure 6 As shown, the partition wall 17 is provided with a second guide angle 22 that matches the first guide angle 21 on an inclined surface. The design of the guide angle of the inclined surface between the telescopic member 7 and the partition wall 17 improves the operational flexibility of the adjustment device. Even if the operating member 6 is not fully pressed down, the inclined surface matching of the first guide angle 21 and the second guide angle 22 can effectively guide the telescopic member 7 so that it can smoothly escape from the locked state of the gear slot 16. Once out of the locked state, the telescopic member 7 can slide freely in the first direction in the card slot 15 and enter the position adjustment state.

[0054] The elastic member (marked in the figure) is installed in the spring groove 18, one end of which abuts the sliding member 5, and the other end abuts the bottom of the spring groove 18 to apply elastic force to the telescopic member 7, so that the telescopic member 7 can be parked in the first position in the gear groove 16 when not affected by external force.

[0055] The operating principle of the back width adjustment device of this embodiment is as follows:

[0056] The operating member 6 is pressed along the second direction, and the telescopic member assembly is acted upon by the thrust of the operating member 6 and overcomes the elastic force of the elastic member to slide to the second position along the third direction or its extension direction; the sliding member 5 assembly slides along the first direction and crosses the partition wall 17 to the top of the adjacent gear slot 16 for position adjustment, and the operating member 6 is released. The elastic force of the elastic member causes the telescopic member 7 to slide to the first position perpendicular to the third direction or its extension direction so that the insertion end 19 of the telescopic member 7 enters the adjacent gear slot 16 for docking and re-locking, and pushes the operating member 6 to reset.

[0057] In this embodiment, the telescopic component assembly in the device cooperates with the gear slot 16 in the card slot 15 to achieve the height adjustment of the backpack back width 2. The telescopic component 7 is built into the sliding component 5, and the two ends clamp the groove wall of the card slot 15. When the insertion end 19 is docked in the gear slot 16, it is locked by the elastic force of the elastic member to ensure the stability of the backpack back width 2. The user can easily press the operating member 6 to slide the telescopic component assembly to the second position, thereby releasing the locked state with the gear slot 16. This operation method is simple and intuitive, and is convenient for users to make quick adjustments. When the sliding component 5 assembly slides along the first direction and crosses the partition wall 17 to the top of the adjacent gear slot 16, the operating member 6 is released, and the elastic force of the elastic member will cause the telescopic component 7 to slide to the first position and re-enter the adjacent gear slot 16 to dock and lock. Due to the uniform spacing of the gear slots 16 in the card slot 15, the device can adapt to the body shape and needs of different users and provide personalized backpack back width 2 adjustment.

[0058] A backpack, such as Figure 8 As shown, the backpack includes a backpack body 1, a back sheet 2, shoulder straps 3, a connecting strap and an adjusting device, and the adjusting device adopts the above-mentioned back sheet adjusting device. The back sheet 2 is movably connected to the backpack body 1, and the adjusting device is fixed to the backpack body 1 for controlling the position of the back sheet 2 on the backpack body 1; one end of the shoulder strap 3 is fixed to the backpack body 1, and the other end is fixed to the back sheet 2. Specifically, the adjusting device is built between the backpack body 1 and the back sheet 2, and the operating member 6 and the cover plate 8 expose the side of the back sheet 2 away from the backpack body 1, and the fixing seat 4 is fixed to the backpack body 1. By building the adjusting device between the backpack body 1 and the back sheet 2, the protruding part of the backpack is effectively reduced, making the appearance of the backpack more concise and beautiful. At the same time, the operating member 6 and the cover plate 8 are located on the outside of the back sheet 2, which is convenient for users to operate and adjust.

[0059] The connecting belt (not marked in the figure) is a U-shaped belt, the bottom and both ends of the U-shaped belt are fixedly connected to the back of the backpack body 1 near the back panel 2, the back panel 2 passes through both sides of the U-shaped belt, and forms a removable connection with the backpack body 1 through the adjustment device. A U-shaped belt is used as the connecting belt, and its bottom and both ends are firmly connected to the back of the backpack body 1 near the back panel 2, ensuring a stable connection between the connecting belt and the backpack body 1. This design not only provides stable support for the back panel 2, but also enables the back panel 2 to flexibly pass through both sides of the U-shaped belt, and can be adjusted in position on the backpack body 1, thereby enhancing the adaptability of the backpack to users of different heights. In this embodiment, the connecting belt is made of aluminum strips, which have sufficient hardness and toughness and are not easily deformed.

[0060] A plurality of in-place marks are provided on one side of the backpack body 1 close to the back panel 2. The back panel 2 moves along the first direction and exposes the in-place marks to prompt the user to release the operating member 6, so that the telescopic member assembly stops at the first position and is locked. The in-place marks provide an intuitive visual prompt for the user, which is convenient for the user to know when to release the operating member 6, and helps the user understand the current position of the back panel 2 and whether it needs to be adjusted further. Specifically, the present embodiment adopts two in-place marks, a first in-place mark 10 and a second in-place mark 11, wherein the first in-place mark 10 is located at the upper position of the backpack body 1 close to the back panel 2, the first in-place mark 10 is in the shape of a fish head, and S is written on it; the second in-place mark 11 is located at the lower position of the backpack body 1 close to the back panel 2, the second in-place mark 11 is in the shape of a fish tail, and M is written on it. When the user moves the back panel 2 downward along the first direction until the fish head is fully exposed, the user is reminded that the adjustment has been completed and the operating member 6 can be released; when the user moves the back panel 2 upward along the first direction until the fish tail is fully exposed, the user is reminded that the adjustment has been completed and the operating member 6 can be released.

[0061] In this embodiment, the backpack design improves the flexibility and adaptability of the backpack by introducing a back width adjustment device. The back width 2 and the backpack body 1 are connected in a removable manner, and the position of the back width 2 on the backpack body 1 is controlled by the adjustment device, so that the backpack can be personalized according to different usage scenarios and individual needs. One end of the shoulder strap 3 is firmly connected to the backpack body 1, and the other end is connected to the back width 2. By adjusting the position of the back width 2, the effective length and angle of the shoulder strap 3 can also be adjusted accordingly. This design is based on ergonomic principles, so that the backpack can fit the user's back and shoulders tightly, providing the child with the best carrying experience. In particular, for children of different heights, the backpack can be easily adjusted to ensure that the weight of the backpack can be evenly distributed on the child's back and shoulders, effectively reducing the carrying pressure and preventing the physical burden caused by improper backpacking.

[0062] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A back width adjustment device for adjusting the position of a back width (2) on a backpack, characterized in that: include: A fixed seat (4) is provided with a slideway (12) extending in a first direction, and two side walls thereof are provided with a clamping groove (15) extending in the first direction; the clamping groove (15) is provided with a plurality of evenly spaced gear slots (16) along its extending direction, and a partition wall (17) is provided between adjacent gear slots (16); the gear slots (16) are symmetrically distributed and correspond one to one in the clamping grooves (15) on both sides of the fixed seat (4); The sliding member (5) has clamping structures at both ends thereof that can clamp the groove wall of the clamping groove (15), so that the sliding member (5) slides in the clamping groove (15) along the first direction; at the same time, the sliding member (5) and the fixing seat (4) slide in cooperation with each other along the slideway (12) in the first direction; An operating member (6) which is movably mounted on the outside of the sliding member (5) and is suitable for pressing along a second direction perpendicular to the first direction; A telescopic member assembly, comprising two telescopic members (7) which are built into the sliding member (5), the two telescopic members (7) respectively abutting against two sides of the operating member (6); the telescopic member assembly is adapted to be slidably connected to the sliding member (5) in a third direction perpendicular to both the first direction and the second direction or in an extension direction thereof; the two ends of the telescopic member (7) clamp the groove wall of the card slot (15), and the insertion end (19) inserted into the card slot (15) is adapted to stop at a first position in the gear slot (16) for locking; when the insertion end (19) of the telescopic member (7) is in a second position away from the gear slot (16), the telescopic member (7) enters an unlocked state, and the telescopic member (7) and the sliding member (5) are adapted to slide together in the card slot (15) along the first direction; each of the telescopic members (7) is provided with a spring groove (18); and an elastic member, which is installed in the spring groove (18), one end of which abuts against the sliding member (5) and the other end of which abuts against the bottom of the spring groove (18) to apply elastic force to the telescopic member (7), so that the telescopic member (7) can be parked at the first position in the gear groove (16) when not affected by external force; The operating member (6) is pressed in the second direction, and the telescopic member assembly is acted upon by the thrust of the operating member (6) and overcomes the elastic force of the elastic member to slide in the third direction or its extension direction to the second position; the sliding member (5) assembly slides in the first direction and passes over the partition wall (17) to the top of the adjacent gear slot (16) for position adjustment, and the operating member (6) is released, and the elastic force of the elastic member causes the telescopic member (7) to slide in a direction perpendicular to the third direction or its extension direction to the first position so that the insertion end (19) of the telescopic member (7) enters the adjacent gear slot (16) to stop and be re-locked, and pushes the operating member (6) to reset.

2. A back width adjustment device as claimed in claim 1, characterized in that: The operating member (6) is provided with a first mating surface (29) and a second mating surface (30) facing each other, the first mating surface (29) and the second mating surface (30) are both inclined surfaces gradually approaching each other along the second direction, and the first mating surface (29) and the second mating surface (30) respectively mate with the contact surface inclined surfaces of the two telescopic members (7).

3. A back width adjustment device as claimed in claim 2, characterized in that: The telescopic member (7) is provided with a slide groove (23) extending along a third direction, and the sliding member (5) is provided with a slide rod (24) slidably matched with the slide groove (23); a sliding space is provided between the slide rod (24) and the bottom of the slide groove (23).

4. A back width adjustment device as claimed in claim 3, characterized in that: The end surface of the partition wall (17) of the telescopic member (7) close to the gear slot (16) is provided with a first guide angle (21), and the partition wall (17) is provided with a second guide angle (22) which matches the inclined surface of the first guide angle (21).

5. The back width adjustment device according to claim 1, characterized in that: The sliding member (5) is further provided with a cover plate (8), and the cover plate (8) is provided with a clearance space matching the operating member (6) so that the operating member (6) can be pressed along the second direction; a gap (20) is provided between the cover plate (8) and the sliding member (5) so that a corresponding part of the back panel (2) can pass through and be placed in the gap (20).

6. A back width adjustment device as claimed in claim 5, characterized in that: A groove (13) recessed toward the interior of the fixed seat (4) is provided in the middle of the slideway (12) of the fixed seat (4), and the groove (13) is communicated with the slideway (12); and the sliding member (5) is provided with a sliding end (14) slidably matched with the groove (13).

7. A backpack, characterized in that: The backpack comprises a backpack body (1), a back panel (2), shoulder straps (3) and an adjusting device, wherein the adjusting device is a back panel adjusting device as claimed in any one of claims 1 to 6; the back panel (2) is movably connected to the backpack body (1), and the adjusting device is fixedly connected to the backpack body (1) for controlling the position of the back panel (2) on the backpack body (1); one end of the shoulder strap (3) is fixedly connected to the backpack body (1), and the other end is fixedly connected to the back panel (2).

8. A backpack as claimed in claim 7, characterized in that: The backpack also includes a connecting belt, which is a U-shaped belt. The bottom and both ends of the U-shaped belt are fixedly connected to the back of the backpack body (1) close to the back panel (2). The back panel (2) passes through both sides of the U-shaped belt and forms a movably connected relationship with the backpack body (1) through an adjustment device.

9. A backpack as claimed in claim 8, characterized in that: The adjustment device is built between the backpack body (1) and the back panel (2), and the operating member (6) and the cover plate (8) expose the side of the back panel (2) away from the backpack body (1), and the fixing seat (4) is fixedly connected to the backpack body (1).

10. A backpack as claimed in claim 9, characterized in that: A plurality of in-position marks are provided on one side of the backpack body (1) close to the back panel (2); the back panel (2) moves along a first direction and exposes the in-position marks to prompt the operator to release the operating member (6), so that the telescopic member assembly stops at the first position and is locked.

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