Headrest lifting mechanism of child safety seat

Abstract

The utility model discloses a headrest lifting mechanism of a child safety seat. The headrest lifting mechanism comprises a blow-molded seat back, a headrest and a control assembly, the control assembly is arranged on the headrest; the chair back is provided with a longitudinal inner cavity extending from the top face in the height direction of the chair back, the top face is provided with an access, and a plurality of gear grooves formed in the two sides of the longitudinal inner cavity are formed in the chair back. The headrest comprises a pillow part and a telescopic part on the lower side of the pillow part; the section of the telescopic part is equivalent to that of the longitudinal inner cavity; the telescopic part extends into a longitudinal inner cavity of the chair back, and the headrest can move up and down above the top surface of the chair back; the control assembly comprises a manual operation piece capable of moving up and down and two locking blocks controlled by the manual operation piece. The ends of the locking blocks can protrude out of or retract into the two side faces of the telescopic part. Insertion connection without additional through grooves is achieved, so that the strength of the chair back is enhanced, the structure is simplified, parts are reduced, and the smoothness and safety of headrest adjustment are improved.

Description

Technical Field

[0001] The utility model relates to a child safety seat, in particular to a headrest lifting mechanism of the child safety seat, through which the height of the headrest on the seat back can be adjusted to adapt to the heights of different children. Background Art

[0002] The headrest adjustment mechanism of a child safety seat is an important part of the seat. Its main function is to adjust the height of the headrest to provide better protection and comfort as the child grows and changes in height.

[0003] CN108116279A discloses a headrest height adjustment mechanism for a safety seat, comprising an adjustment assembly disposed between the seatback and the headrest. The back of the seatback has a through slot extending in the direction of the seatback's height, and the backs of both sides of the through slot have multiple first-gear slots extending in the direction of the seatback's height. The adjustment assembly includes a handle assembly, a locking block, and a pressure block located on the seatback. In this adjustment mechanism, since the headrest is located on the inner side of the seatback and the pressure block is located on the rear side of the seatback, a through slot is required in the center of the seatback.

[0004] The aforementioned headrest installation method has the following issues: 1. The through-slot design reduces the overall strength of the seatback; 2. The headrest adjustment mechanism, including the headrest, handle assembly, and pressure block, is located on the inside and outside of the seatback, resulting in insufficient stability and the possibility of eccentricity, causing the headrest to become stuck and unsmooth during adjustment; 3. Additional components, such as the pressure block and cover, are required. Utility Model Content

[0005] The existing front and rear separated headrest structure on the seat back has problems. The technical problem to be solved by the present invention is to provide a headrest lifting mechanism for a child safety seat with better stability and reduced pressure blocks and cover plates.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a headrest lifting mechanism for a child safety seat,

[0007] It includes a blow-molded chair back, a headrest and a control assembly; the control assembly is arranged on the headrest;

[0008] The chair back has a longitudinal inner cavity extending from the top surface to the height direction of the chair back, the top surface has an entrance and exit, and the chair back is provided with a plurality of gear slots arranged on both sides of the longitudinal inner cavity;

[0009] The headrest includes a pillow portion and a telescopic portion on the lower side of the pillow portion; the cross-section of the telescopic portion is equivalent to the cross-section of the longitudinal inner cavity; the telescopic portion extends into the longitudinal inner cavity of the chair back, and the headrest can move up and down above the top surface of the chair back;

[0010] The control assembly includes a manual operating member that can move up and down and two locking blocks controlled by the manual operating member; the ends of the locking blocks can protrude or retract into the two side surfaces of the telescopic portion;

[0011] In the first state, the end of the locking block is retracted into the telescopic part, and the telescopic part of the headrest can move up and down in the longitudinal inner cavity; in the second state, the end of the locking block protrudes from the two sides of the telescopic part and enters the gear slot, and the telescopic part of the headrest is locked at a certain height in the longitudinal inner cavity.

[0012] A further preferred embodiment of the present invention is as follows: the manual operating member is a longitudinally extending pull plate member; the pull plate member comprises a grip portion at the upper end, a long strip portion, and a connecting portion at the lower end; the connecting portion is provided with two symmetrical oblique grooves;

[0013] The inner end of the locking block is provided with a connecting column inserted into the inclined slot;

[0014] The back of the headrest is provided with a longitudinal groove and a transverse groove, wherein the longitudinal groove extends downward from the pillow portion to the lower portion of the telescopic portion; the transverse groove is connected to the bottom of the longitudinal groove and extends to both sides of the telescopic portion;

[0015] The locking block is located in the transverse groove.

[0016] A further preferred solution of the present invention is that a pressing block is provided above the transverse groove, and the pressing block restricts the locking block from being separated from the transverse groove.

[0017] A further preferred solution of the present invention is that the manual operating member is equipped with a return spring, which can make the end of the locking block protrude from the end surface of the telescopic portion.

[0018] A further preferred solution of the present invention is: the handshake portion is a rectangular frame with a through hole in the middle; the connecting portion is trapezoidal; the long strip portion is spliced ​​with an upper long strip and a lower long strip, and the upper long strip and the lower long strip are combined by a snap-fit ​​structure.

[0019] A further preferred solution of the present invention is that the telescopic portion is a block structure, two first guide grooves are provided on the front side of the telescopic portion, two second guide grooves are provided on the back side of the telescopic portion, and the control component is located between the two second guide grooves.

[0020] A further preferred solution of the present invention is that the pillow portion includes a pillow middle portion and two wings, the telescopic portion is located at the lower side of the pillow middle portion, and the thickness of the telescopic portion is smaller than the thickness of the pillow middle portion.

[0021] Compared to existing technologies, the present invention offers the following advantages: the headrest is a separate component that plugs directly into the center of the seat back. This technical approach avoids creating a through-slot in the seat back, thus reducing material removal and structural weakening. This connection not only maintains the integrity of the seat back but also enhances its resistance, improving the seat's ability to withstand impact. Furthermore, the increased strength of the seat back also enhances the durability and reliability of the seat, allowing it to withstand longer use and more frequent adjustments without damage.

[0022] Furthermore, the integration of the control unit and headrest into a single component effectively reduces the number of required parts by integrating multiple functions. This design simplifies the seat assembly process, reduces manufacturing costs, and reduces potential failure points associated with excessive parts. The integrated design also results in a more compact seat structure, saving space and allowing for greater flexibility in vehicle installation, improving space utilization. Furthermore, fewer parts means less maintenance complexity and costs, making the seat more economical and efficient in the long term.

[0023] Furthermore, when adjusting the headrest, the unique control assembly and plug-in connection method can effectively avoid jamming and awkward movements. This ensures smooth movement of the headrest during adjustment, providing a better user experience. The smooth adjustment not only allows parents to quickly and accurately adjust the headrest position to meet their child's comfort needs, but also reduces the risk of seat damage caused by difficult adjustments. Furthermore, the smooth adjustment mechanism means that in emergency situations, such as when the headrest needs to be quickly adjusted to ensure the child's safety, parents can react quickly, improving the safety of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the depicted objects and may contain exaggerated representations. Furthermore, the drawings are not necessarily drawn to scale.

[0025] Figure 1 A schematic diagram of a safety seat with a headrest lifting mechanism;

[0026] Figure 2 This is a schematic diagram of the folding of the headrest lifting mechanism of the utility model;

[0027] Figure 3 This is a schematic diagram of the headrest lifting mechanism of the utility model;

[0028] Figure 4 The back structure of the headrest of this utility model is shown in FIG. Figure 1 ;

[0029] Figure 5 The back structure of the headrest of this utility model is shown in FIG. Figure 2 ;

[0030] Figure 6 This is a schematic diagram of the disassembly of the manual operating part and locking block. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0032] It should be noted that like reference numerals denote like items in the following drawings, and therefore, once an item is defined in one drawing, it will not be further defined or explained in the subsequent drawings.

[0033] like Figures 1 to 3 As shown, the headrest lifting mechanism 100 of a child safety seat 200 comprises a blow-molded seatback 10, a headrest 20, and a control assembly 30, which is mounted on the headrest 20. This technical approach not only simplifies the overall structure and reduces the number of components, but also improves the seat's aesthetics and practicality. The seatback 10 is blow-molded from a high-strength material, ensuring durability and stability. This design avoids traditional through-slot structures, significantly enhancing the seatback's overall strength and reducing safety risks associated with insufficient backrest strength.

[0034] like Figure 4 and Figure 5 As shown, the seat back 10 has a longitudinal cavity 11 extending from its top surface along its height. This cavity 11, extending from the top surface along the height of the seat back 10, forms an internal passageway that provides space for the seat's adjustment mechanism. A portal 12 is located at the top of the longitudinal cavity 11. This portal 12 is a key component of the adjustment mechanism, allowing the telescopic portion 22 of the headrest 20 to move up and down within the cavity 11, thereby adjusting the headrest's height.

[0035] Furthermore, the seatback 10 is designed with multiple positioning slots 13, located on either side of the longitudinal inner cavity 11. These slots 13 provide multiple fixed positions for the telescopic portion 22 of the headrest 20, allowing the headrest to be locked at different heights to accommodate children of varying heights. Each positioning slot 13 is precisely manufactured to ensure that the locking block 32 smoothly enters and locks into its corresponding position, preventing the headrest from accidentally sliding or moving during travel and ensuring the safety of children.

[0036] The longitudinal inner cavity 11 of the seat back 10 and the gear slot 13 cooperate with each other and are important components of the headrest lifting mechanism 100 of the child safety seat 200. They work together to provide a safe and convenient headrest height adjustment system, ensuring that the seat can be precisely adjusted according to the child's height and comfort requirements.

[0037] The headrest 20 comprises a pillow portion 21 and a retractable portion 22 located below the pillow portion 21. The pillow portion 21 is the main component of the headrest 20 and is designed to provide comfortable support for a child's head. The shape and material of the pillow portion 21 are designed with children's physiological characteristics and comfort in mind, ensuring comfort and safety during long vehicle rides.

[0038] The telescopic portion 22 is another important part of the headrest 20, which allows the headrest to be adjusted vertically to accommodate children of different heights. The cooperation between the telescopic portion 22 and the inner cavity can provide flexible adjustment without taking up additional space.

[0039] The cross-section of the telescopic portion 22 is comparable to that of the longitudinal inner cavity 11. This precise match ensures that the telescopic portion 22 can slide smoothly and tightly within the longitudinal inner cavity 11, reducing friction and wear and improving the smoothness and durability of adjustment. During actual operation, the telescopic portion 22 extends into the longitudinal inner cavity 11 of the seat back 10, and the headrest 20 can move up and down above the top surface of the seat back 10; and the telescopic portion 22 can precisely position the headrest 20 within the longitudinal inner cavity 11, ensuring that the headrest can be securely locked after being adjusted to the desired height, avoiding accidental sliding during driving. The use of the telescopic portion 22 in conjunction with the longitudinal inner cavity 11 provides a safe adjustment mechanism, ensuring that the headrest will not suddenly drop when impacted, protecting the child's head from injury.

[0040] The control assembly 30 includes a manually movable member 31 and two locking blocks 32 controlled by the manual member 31. The manual member 31 allows the user to adjust the height of the headrest 20 through simple manual operation. This design ensures intuitive and convenient operation, allowing parents to quickly adjust the headrest height to suit their child's needs. The ends of the locking blocks 32 can protrude or retract from the two sides of the telescopic portion 22.

[0041] The two locking blocks 32 are key actuators of the control assembly 30. They are responsible for locking the telescopic portion 22 of the headrest 20 at a specific height within the longitudinal inner cavity 11 of the seat back 10. The end design of the locking blocks 32 allows them to protrude or retract from the sides of the telescopic portion 22. This flexible mechanical action is key to achieving precise adjustment of the headrest height.

[0042] In the first state, the end of the locking block 32 is retracted into the telescopic portion 22, so that the telescopic portion 22 of the headrest 20 can move freely up and down in the longitudinal inner cavity 11. This state allows the user to easily adjust the height of the headrest according to the child's height and sitting posture requirements.

[0043] In the second position, the ends of the locking block 32 protrude from both sides of the telescopic portion 22 and enter the shift slot 13, locking the telescopic portion 22 of the headrest 20 at a certain height in the longitudinal inner cavity 11. This locking mechanism ensures the stability of the headrest during driving, preventing it from shifting due to road bumps or sudden braking, thereby protecting children's safety.

[0044] The linkage mechanism between the manual operating member 31 and the locking block 32 is designed to be smooth and provide clear feedback, allowing the user to feel the confirmation of each adjustment step during operation, thereby increasing the accuracy and confidence of the operation.

[0045] More specifically, if Figures 4 to 6 As shown, the manual operating member 31 is a longitudinally extending pull plate b. The pull plate b includes a grip portion b1 at the upper end, a strip portion b2, and a connecting portion b3 at the lower end. This segmented design not only enhances the structural strength of the pull plate b, but also provides a better operating feel and visual effect.

[0046] Preferably, the grip portion b1 is designed to be easily gripped, typically curved or arcuate to accommodate the natural gripping posture of the human hand. The strip portion b2 forms the main body of the pull plate b, connecting the grip portion b1 and the connecting portion b3 and providing the majority of the length of the manual operating member 31. The strip portion b2 is typically designed to be simple and sturdy to ensure stability and durability during frequent use.

[0047] Two symmetrical beveled slots h are defined on the connecting portion b3. During installation, the inner end of the locking block 32 is provided with connecting posts a that insert into the beveled slots h. These posts a precisely fit into the beveled slots h. This coordination ensures that the movement of the locking block 32 is synchronized with the movement of the manual operating member 31, providing a precise and reliable adjustment mechanism. Furthermore, the beveled slots h are key to the mechanical linkage between the locking block 32 and the manual operating member 31, allowing the connecting posts a to smoothly insert and slide, thereby enabling the locking block 32 to extend and retract.

[0048] Furthermore, the back of the headrest 20 is integrated with a longitudinal slot v1 and a transverse slot v2, which are crucial to the headrest's adjustment mechanism. The longitudinal slot v1 extends downward from the occipital portion 21 to the lower portion of the telescopic portion 22, providing a vertical sliding path for the manual operating member 31, allowing it to move smoothly within the back of the headrest, thereby controlling the headrest's height.

[0049] The transverse groove v2 connects to the bottom of the longitudinal groove v1 and extends to both sides of the telescopic portion 22. This allows the locking block 32 to slide left and right within the groove, providing fine-tuning of the headrest in the horizontal direction and enhancing its adaptability and stability. This design not only allows for precise adjustment of the headrest's height, but also ensures stability and durability under various usage conditions.

[0050] Furthermore, a pressure block v3 is positioned above the transverse groove v2, providing a crucial fixation feature. The pressure block v3's primary function is to prevent the locking block 32 from disengaging from the transverse groove v2, ensuring it remains in the correct position during operation. This enhances the stability and safety of the entire headrest 20 adjustment mechanism.

[0051] Of course, in the present invention, the manual operating member 31 is equipped with a return spring s. Its function is to quickly and automatically return the end of the locking block 32 to its initial position, protruding from the end surface of the telescopic portion 22, when the operating member is released, ready for the next adjustment. One end of the return spring s is fixed to the elongated portion b2 of the manual operating member 31, and the other end is connected to the connector within the longitudinal groove v1, ensuring stable transmission of the spring force and precise movement of the locking block 32. A connecting plate is installed within the specially designed connecting hole in the elongated portion b2, further stabilizing the spring's fixation, reducing vibration and displacement during use, and improving the ease of adjustment and the responsiveness of the seat.

[0052] Preferably, grip portion b1 is a rectangular frame with a through-hole in the center. This structure not only provides a secure grip but also facilitates finger insertion and adjustment during operation, improving ease and comfort. The through-hole also helps reduce the weight of grip portion b1 without compromising its structural strength, a crucial consideration for users who use the chair for extended periods of time.

[0053] The trapezoidal shape of connection b3 provides additional stability and support for the manual operating member 31. This trapezoidal structure makes connection b3 more stable when subjected to loads, reducing deformation caused by improper operation or prolonged use. This technical approach also allows connection b3 to better coordinate with other seat components, improving overall coordination and aesthetics. This structural optimization makes the manual operating member 31 smoother to operate, while also enhancing the durability and reliability of the seat.

[0054] Preferably, the strip portion b2 is formed by splicing an upper strip b21 and a lower strip b22, which are connected by a snap-fit ​​structure. This structure provides greater flexibility and detachability, allowing the strip portion b2 to be easily assembled or disassembled when needed, facilitating maintenance and repair.

[0055] Furthermore, the telescopic portion 22 is a block-shaped structure with two first guide slots 221 on the front and two second guide slots 222 on the back. The control assembly 30 is located between the two second guide slots 222. The use of the guide slots provides precise guidance for the control assembly 30, ensuring smooth movement and positioning on the telescopic portion 22. The provision of the first guide slots 221 and the second guide slots 222 enables precise positioning and movement of the control assembly 30 in both directions. This bidirectional guidance design improves the stability and adjustment accuracy of the entire headrest lifting mechanism.

[0056] The control assembly 30 is located between the two second guide grooves 222. This layout makes the control assembly 30 more stable during operation and facilitates force transmission and adjustment.

[0057] In summary, the design of the telescopic portion 22 not only improves the operational stability and adjustment accuracy of the headrest lifting mechanism through the use of the guide groove, but also enhances its durability and maintenance convenience.

[0058] Preferably, the pillow portion 21 is composed of a central portion 211 and two wings 212 to provide better head and neck support while increasing ride comfort and safety. The telescopic portion 22 is located below the central portion 211 and is thinner than the central portion 211. This technical approach allows the headrest 20 to be adjusted without significantly increasing its overall height, maintaining the interior space of the seat while enabling precise adjustment. Furthermore, this structure reduces the weight of the headrest, increasing the portability of the seat. Its compactness also makes the adjustment mechanism easier to operate while maintaining the seat's aesthetic appearance. The reduced thickness of the telescopic portion 22 also helps reduce stress concentration in the material, enhancing the durability and fatigue resistance of the headrest.

[0059] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "back," "left," "right," "inner," and "outer" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are used solely to facilitate understanding and have no other directional meanings, and should not be construed as limitations on this utility model.

[0060] This article introduces the headrest lifting mechanism for a child safety seat provided by the present invention. Specific examples are used to illustrate the principles and implementation methods of the present invention. The above examples are intended only to facilitate understanding of the present invention and its core concepts. It should be noted that those skilled in the art may, without departing from the principles of the present invention, make various improvements and modifications to the present invention, and such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A headrest lifting mechanism for a child safety seat, characterized by: It includes a blow-molded chair back, a headrest and a control assembly; the control assembly is arranged on the headrest; The chair back has a longitudinal inner cavity extending from the top surface along the height direction of the chair back, the top surface has an entrance and exit, and the chair back is provided with a plurality of gear slots arranged on both sides of the longitudinal inner cavity; The headrest includes a pillow portion and a telescopic portion on the lower side of the pillow portion; the cross-section of the telescopic portion is equivalent to the cross-section of the longitudinal inner cavity; the telescopic portion extends into the longitudinal inner cavity of the seat back, and the headrest can move up and down above the top surface of the seat back; the control assembly includes a manual operating member that can move up and down and two locking blocks controlled by the manual operating member; the ends of the locking blocks can protrude or retract into the two side surfaces of the telescopic portion; In the first state, the end of the locking block is retracted into the telescopic part, and the telescopic part of the headrest can move up and down in the longitudinal inner cavity; in the second state, the end of the locking block protrudes from the two sides of the telescopic part and enters the gear slot, and the telescopic part of the headrest is locked at a certain height in the longitudinal inner cavity.

2. The headrest lifting mechanism of a child safety seat according to claim 1, characterized in that: The manual operating member is a longitudinally extending pull plate member; the pull plate member includes a handgrip portion at the upper end, a long strip portion, and a connecting portion at the lower end; the connecting portion is provided with two symmetrical inclined grooves; The inner end of the locking block is provided with a connecting column inserted into the inclined slot; The back of the headrest is provided with a longitudinal groove and a transverse groove, wherein the longitudinal groove extends downward from the pillow portion to the lower portion of the telescopic portion; the transverse groove is connected to the bottom of the longitudinal groove and extends to both sides of the telescopic portion; The locking block is located in the transverse groove.

3. The headrest lifting mechanism of a child safety seat according to claim 2, characterized in that: A pressing block is provided above the transverse groove, and the pressing block restricts the locking block from being separated from the transverse groove.

4. The headrest lifting mechanism of a child safety seat according to claim 1, characterized in that: The manual operating part is equipped with a return spring, which can make the end of the locking block protrude from the end surface of the telescopic part.

5. The headrest lifting mechanism of a child safety seat according to claim 2, characterized in that: The handshake portion is a rectangular frame with a through hole in the middle; the connecting portion is trapezoidal in shape; The long strip portion is formed by splicing an upper long strip and a lower long strip, and the upper long strip and the lower long strip are combined by a snap-fit ​​structure.

6. The headrest lifting mechanism of a child safety seat according to claim 1, characterized in that: The telescopic portion is a block-shaped structure. Two first guide grooves are provided on the front side of the telescopic portion, and two second guide grooves are provided on the back side of the telescopic portion. The control component is located between the two second guide grooves.

7. The headrest lifting mechanism of a child safety seat according to claim 1, characterized in that: The pillow portion includes a pillow middle portion and two wings. The telescopic portion is located at the lower side of the pillow middle portion. The thickness of the telescopic portion is smaller than that of the pillow middle portion.

8. A headrest lifting mechanism for a child safety seat, characterized in that: It includes a blow-molded chair back, a headrest and a control assembly; the control assembly is arranged on the headrest; The chair back has a longitudinal inner cavity extending from the top surface to the height direction of the chair back, the top surface has an entrance and exit, and the chair back is provided with a plurality of gear slots arranged on both sides of the longitudinal inner cavity; The headrest includes a pillow portion and a telescopic portion below the pillow portion; the cross-section of the telescopic portion is equivalent to the cross-section of the longitudinal inner cavity; the telescopic portion extends into the longitudinal inner cavity of the chair back, and the headrest can move up and down above the top surface of the chair back; the pillow portion includes a middle pillow portion and two wings, the telescopic portion is located below the middle pillow portion, and the thickness of the telescopic portion is less than the thickness of the middle pillow portion; The control assembly includes a manual operating member that can move up and down and two locking blocks controlled by the manual operating member; the ends of the locking blocks can protrude or retract into the two side surfaces of the telescopic portion; The manual operating part is equipped with a return spring, which can make the end of the locking block protrude from the end surface of the telescopic part.

9. The headrest lifting mechanism of a child safety seat according to claim 8, characterized in that: The manual operating member is a longitudinally extending pull plate member; the pull plate member includes a handgrip portion at the upper end, a long strip portion, and a connecting portion at the lower end; the connecting portion is provided with two symmetrical inclined grooves; The inner end of the locking block is provided with a connecting column inserted into the inclined slot; The back of the headrest is provided with a longitudinal groove and a transverse groove, wherein the longitudinal groove extends downward from the pillow portion to the lower portion of the telescopic portion; the transverse groove is connected to the bottom of the longitudinal groove and extends to both sides of the telescopic portion; The locking block is located in the transverse groove.

10. The headrest lifting mechanism of a child safety seat according to claim 8, characterized in that: The telescopic portion is a block-shaped structure. Two first guide grooves are provided on the front side of the telescopic portion, and two second guide grooves are provided on the back side of the telescopic portion. The control component is located between the two second guide grooves.

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