Headrest for bathtub

Abstract

The utility model discloses a headrest for a bathtub. The headrest comprises a headrest body, the supporting frame is rotationally connected with the headrest body and enables the headrest body to be arranged in the bathtub; the angle adjusting mechanism comprises a pawl, a ratchet wheel and an elastic clamping piece, the ratchet wheel is fixedly connected to the supporting frame, the ratchet wheel is provided with one-way teeth, the pawl is rotationally connected with the headrest body around a rotating shaft, and the pawl is meshed and matched with the ratchet wheel; the other end of the elastic clamping piece is connected with the pawl; the headrest body is suitable for unidirectionally rotating from the first position to the second position relative to the supporting frame, in the process, the pawl is disengaged from one-way teeth of the ratchet wheel, the elastic clamping piece stores energy, and when the pawl corresponds to the next tooth groove position in the ratchet wheel, the elastic clamping piece releases the energy to drive the pawl to be reengaged with the ratchet wheel. The utility model provides a headrest for a bathtub, which enables a user to quickly adjust a headrest body to the most comfortable angle through an angle adjusting mechanism with a simple structure.

Description

Technical Field

[0001] The utility model relates to the technical field of bathtub manufacturing, and particularly relates to a bathtub headrest. Background Art

[0002] During the use of a bathtub, the comfort and adjustability of the headrest are crucial for enhancing the user's bathing experience. Traditional bathtub headrests often lack an effective angle adjustment mechanism, making it difficult for users to adjust the angle of the headrest according to their personal preferences and needs, thus limiting the comfort and flexibility of use. In addition, although some existing adjustable headrests provide an angle adjustment function, their structures are complex, the operation is inconvenient, and they are prone to malfunction after long-term use, affecting the user experience. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background art, and provide a bathtub headrest, through an angle adjustment mechanism with a simple structure, enabling users to quickly adjust the headrest body to the most comfortable angle.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The first technical solution relates to a bathtub headrest, including: a headrest body; a support frame, which is rotatably connected to the headrest body and mounts the headrest body on the bathtub; and an angle adjustment mechanism, which includes a pawl, a ratchet wheel, and an elastic clamping member. The ratchet wheel is fixedly connected to the support frame, the ratchet wheel is provided with one-way teeth, the pawl is rotatably connected to the headrest body around a rotation axis, and the pawl is meshed and cooperated with the ratchet wheel; one end of the elastic clamping member is connected to the headrest body, and the other end is connected to the pawl; the headrest body is adapted to rotate unidirectionally from a first position to a second position relative to the support frame. During this process, the pawl disengages from the one-way teeth of the ratchet wheel, and the elastic clamping member stores energy. When the next tooth groove position on the pawl and the ratchet wheel corresponds, the elastic clamping member releases energy to drive the pawl and the ratchet wheel to re-engage.

[0006] The second technical solution is based on the first technical solution, wherein the angle adjustment mechanism further includes a reset member. The reset member is sleeved on the support frame, one end of which is connected to the ratchet wheel, and the other end is connected to the headrest body; when the headrest body is in the second position, continue to rotate the headrest body in the original direction, the elastic clamping member crosses the dead point position, so that the deformation force of the elastic clamping member fails, and the pawl and the ratchet wheel are disengaged from contact. The headrest body is subjected to the torsion force of the reset member and rotates in the reverse direction back to the first position, so that the deformation force of the elastic clamping member is restored. The elastic clamping member releases energy to drive the pawl and the ratchet wheel to re-engage, completing the angle reset adjustment.

[0007] The third technical solution is based on the second technical solution. Among them, the pawl includes a toothed arm and an abutting arm. The toothed arm and the abutting arm are integrally formed into a U-shaped groove structure. The rotating shaft penetrates through the connection between the toothed arm and the abutting arm and is fixedly connected to the two side walls of the headrest body; the ratchet wheel is provided with a ratchet tooth part, a first protruding end and a second protruding end. The ratchet tooth part is meshed and matched with the toothed arm. The first protruding end and the second protruding end are located on both sides of the ratchet tooth part to form a structure for clamping the ratchet tooth part. The first protruding end is adapted to move along the U-shaped groove during the angle adjustment of the headrest body.

[0008] The fourth technical solution is based on the third technical solution. Among them, when the headrest body is in the first position, the first protruding end abuts against the groove wall of the U-shaped groove close to the abutting arm. The abutting arm abuts against the side wall of the headrest body under the pressure of the first protruding end. The top end of the toothed arm abuts against the second protruding end, and the ratchet tooth part is meshed with the toothed arm; when the headrest body is in the second position, the first protruding end abuts against the groove wall of the U-shaped groove close to the toothed arm, and the abutting arm abuts against the side wall of the headrest body.

[0009] The fifth technical solution is based on the third technical solution. Among them, one end of the elastic clamping member is connected to the headrest body, and the other end is connected to the toothed arm; define the connection point of the elastic clamping member and the headrest body as A, and define the connection point of the elastic clamping member and the toothed arm as B. When the headrest body is between the first position and the second position, the position of point B is higher than that of point A in the direction perpendicular to the ground, and the pawl is meshed with the ratchet wheel.

[0010] The sixth technical solution is based on the fifth technical solution. Among them, define the connection point of the pawl and the rotating shaft as C. When points A, B, and C are connected in a straight line, the elastic clamping member is in the dead point position; when the headrest body continues to rotate in the original direction at the second position, the connection line of points A, B, and C is an obtuse angle with the opening facing upwards, and the deformation force of the elastic clamping member fails. The pawl is separated from the ratchet wheel. The headrest body is subjected to the torsional force of the reset member and rotates in the opposite direction to the first position. The connection line of points A, B, and C is an obtuse angle with the opening facing downwards, and the deformation force of the elastic clamping member is restored, driving the pawl to re-engage with the ratchet wheel.

[0011] The seventh technical solution is based on the first technical solution. Among them, the cross-sectional shape of the support frame is circular. The headrest body is provided with a circular groove matching the cross-sectional shape of the support frame. The support frame penetrates through the circular groove and is rotatably connected to the headrest body.

[0012] The eighth technical solution is based on the first technical solution. Among them, it further includes a lifting structure fixedly connected to the bathtub. The support frame is a U-shaped structure with two support feet, and the support feet are connected to the bathtub through the lifting structure.

[0013] The ninth technical solution is based on the eighth technical solution. Among them, a plurality of cutting grooves are provided on the supporting feet, and the cutting grooves are arranged at intervals along the axial direction of the supporting feet. The lifting structure includes a supporting seat and a limiting block. The supporting seat is installed on the bathtub, and a hollow channel for the supporting feet to pass through is provided in the supporting seat; the limiting block is arranged radially along the supporting seat and forms a stop fit by inserting into the cutting groove.

[0014] The tenth technical solution is based on the first technical solution. Among them, the headrest body conforms to the curve of the head and neck.

[0015] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0016] In the first technical solution and related embodiments, a bathtub headrest is proposed. Through the angle adjustment mechanism, users can easily adjust the angle of the headrest body to meet different lying needs and provide a more comfortable bathing experience. The angle adjustment mechanism combines a pawl, a ratchet, and an elastic clamping member. The pawl is connected to the headrest body around a rotating shaft, and the ratchet adopts a one-way tooth design and is fixedly installed on the support frame. When the user adjusts the headrest angle according to the need, the headrest body drives the rotating shaft to rotate relative to the support frame, thereby driving the pawl to change its position, so that the pawl disengages from the ratchet, and the elastic clamping member is compressed. The elastic clamping member uses its deformation force to cause the pawl to slide along the tooth back of the ratchet and smoothly insert into the next tooth groove, realizing the one-way intermittent rotation of the headrest body. This design not only ensures the stable support of the headrest at any selected angle but also effectively prevents accidental reversal caused by the weight of the human body or external forces, ensuring the safety and stability of use.

[0017] In the second technical solution and related embodiments, the convenience and practicality of the bathtub headrest are further improved by adding a reset member. One end of the reset member is connected to the fixed housing, and the other end is connected to the ratchet fixed on the support frame. This connection method enables the reset member to store or release elastic potential energy when the headrest body rotates. When the user adjusts the headrest body from the initial position (the first position) to the maximum effective angle (the second position), the reset member will deform accordingly and store a certain amount of elastic potential energy. When the user hopes to reset the headrest body to the initial position, simply rotate the headrest body in the original direction. At this time, the elastic clamping member passes through the dead point position and fails, and the pawl disengages from the ratchet and no longer hinders the rotation of the headrest. Subsequently, the reset member releases the previously stored elastic potential energy, acts on the headrest body in the form of torque, and drives it to rotate back to the initial position (the first position) in the reverse direction. In this reset operation, the reset process of the reset member is stable and rapid. The user only needs to simply rotate the headrest beyond the dead point to trigger the automatic reset mechanism, improving the convenience of use.

[0018] In the third technical solution and related embodiments, the pawl adopts a U-shaped groove structure to provide a clearance space for the first protruding end of the ratchet wheel, enabling the ratchet wheel to move along the U-shaped groove when the headrest body is adjusted in angle, thereby achieving the unidirectional intermittent movement of the ratchet mechanism.

[0019] In the fourth technical solution and related embodiments, when the headrest body is in the first position, the first protruding end of the ratchet wheel tightly abuts against the groove wall of the U-shaped groove close to the abutting arm, causing the abutting arm to firmly abut against the inner wall of the fixed housing under the pressure of the first protruding end. At the same time, the top end of the tooth-shaped arm of the pawl also abuts against the second protruding end, forming a stable support structure, thus ensuring the stability and safety of the headrest at this angle. When the headrest body is adjusted to the second position, the position of the first protruding end changes and instead abuts against the groove wall of the U-shaped groove close to the tooth-shaped arm. At this time, the abutting arm still maintains the abutting state with the side wall of the headrest body, ensuring the stable state at the second position.

[0020] In the fifth technical solution and related embodiments, by designing that one end of the elastic clip is connected to the headrest body and the other end is connected to the tooth-shaped arm of the pawl, and keeping point B higher than point A in the direction perpendicular to the ground between the first position and the second position, the deformation force of the elastic clip is utilized to ensure the engagement of the pawl and the ratchet wheel.

[0021] In the sixth technical solution and related embodiments, through the action of the elastic clip at the dead point position and the mechanism of the pawl disengaging from and re-engaging with the ratchet wheel, the headrest body can achieve a return rotation when reaching the maximum effective rotation angle. When the headrest body rotates to the second position, i.e., the maximum effective rotation angle, when points A, B, and C are in a straight line, the elastic clip is in the dead point position. At this time, if the headrest body continues to rotate in the original direction and crosses the dead point position, the connection line of points A, B, and C is an obtuse angle with the opening downward, and the deformation force of the elastic clip fails, and the ratchet teeth portion is disengaged from the tooth-shaped arm and cannot be engaged. Since one end of the reset member is clamped to the ratchet wheel and the other end is connected to the headrest body, the rotation of the headrest body increases the torsion force of the reset member. At the moment when the ratchet teeth portion is disengaged from the tooth-shaped arm, the torsion force of the reset member causes the headrest body to rotate in the reverse direction to the first position, and the first protruding end comes into contact with and presses the abutting arm again, causing the elastic clip to overcome the dead point position and return below the dead point position. At this time, the connection line of points A, B, and C is an obtuse angle with the opening upward, and the elastic clip restores the deformation force and pushes the pawl to re-engage with the ratchet wheel, thus ensuring that the headrest body can return to the initial position.

[0022] In the seventh technical solution and related embodiments, the circular groove is used for the circumferential positioning of the support frame, enabling the headrest body to perform a return rotation around the support frame.

[0023] In the eighth technical solution and related embodiments, the height adjustment of the headrest body can be achieved through a lifting structure.

[0024] In the ninth technical solution and related embodiments, simply push and pull the limit block back and forth. Through the cooperation of the limit block and the cutting groove, the stop cooperation between the limit block and the support frame can be easily achieved, and the height adjustment of the headrest body can be realized.

[0025] In the tenth technical solution and related embodiments, the design of the front headrest housing closely fits the curve of the head and neck, improving the comfort and ergonomic performance of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is an exploded view of the headrest for a bathtub in the embodiment;

[0028] Figure 2 It is a schematic diagram of the back of the headrest for a bathtub in the embodiment;

[0029] Figure 3 It is a schematic diagram of the first position of the headrest for a bathtub in the embodiment;

[0030] Figure 4 It is a schematic diagram of the second position of the headrest for a bathtub in the embodiment;

[0031] Figure 5 It is a schematic diagram of the headrest for a bathtub continuing to rotate in the second position;

[0032] Figure 6 It is a schematic diagram of the headrest for a bathtub being turned back after passing the dead point position;

[0033] Figure 7 It is a schematic diagram of the headrest lifting mechanism for a bathtub in the embodiment.

[0034] Description of the main reference numerals:

[0035] Headrest body 1; Angle adjustment mechanism 2; Support frame 3; Lifting mechanism 4; Fixed housing 5; Pawl 6; Ratchet 7; Reset member 8; Elastic clip 9; Tooth-shaped arm 11; Contact arm 12; U-shaped groove 13; Rotating shaft 14; Tooth portion 15; First protruding end 16; Second protruding end 17; Support foot 18; Cutting groove 19; Support seat 20; Limit block 21; Front headrest housing 22; Rear headrest housing 23; First fixing piece 24; Second fixing piece 25; Self-tapping screw 26; Circular groove 27; Accommodation frame 28. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are the preferred embodiments of the present utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0037] In the claims, the description and the above-mentioned accompanying drawings of the present utility model, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are used to distinguish different objects and not for describing a specific order.

[0038] In the claims, the description and the above-mentioned accompanying drawings of the present utility model, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "horizontal", "vertical", "level", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the specific protection scope of the present utility model.

[0039] In the claims, the description and the above-mentioned accompanying drawings of the present utility model, unless otherwise clearly defined, when using terms such as "fixed connection" or "fixedly connected", should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrated as a whole, and being fixed by other devices or elements.

[0040] In the claims, the description and the above-mentioned accompanying drawings of the present utility model, when using terms such as "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0041] See Figure 1 and Figure 7 , as Figure 1 shown, a headrest for a bathtub includes a headrest body 1, a support frame 3, an angle adjustment mechanism 2 and a lifting structure.

[0042] The headrest body 1, as Figures 3 to 7 shown, has an accommodation space inside for accommodating components such as the angle adjustment mechanism 2. As Figure 1As shown, the headrest body 1 includes a front headrest shell 22 and a rear headrest shell 23, which are connected in a detachable manner. Specifically, the front headrest shell 22 and the rear headrest shell 23 are fixedly connected by self-tapping screws 26. When the front headrest shell 22 and the rear headrest shell 23 are closed, they form a receiving space for wrapping the support frame 3 and the angle adjustment mechanism 2, protecting the internal components and beautifying the appearance. The headrest body 1 conforms to the curve of the user's head and neck. Specifically, the front headrest shell 22 conforms to the curve of the head and neck to improve the comfort of use. An accommodation frame 28 is provided in the middle of the inside of the rear headrest shell 23 for accommodating the angle adjustment mechanism 2, and the front headrest shell 22 and the rear headrest shell 23 enclose a circular groove 27 on both sides of the accommodation frame 28 for carrying the support frame 3.

[0043] The support frame 3, as Figure 1 and Figure 2 shown, the support frame 3 is rotatably connected to the headrest body 1 and mounts the headrest body 1 on the edge of the bathtub. The cross-sectional shape of the support frame 3 is circular, and the headrest body 1 is provided with a circular groove 27 that matches the cross-sectional shape of the support frame 3. The support frame 3 passes through the circular groove 27 and is rotatably connected to the headrest body 1. Specifically, the support frame 3 is a U-shaped structure with two support feet 18. The U-shaped bottom edge of the support frame 3 passes through the circular groove 27 and is rotatably connected to the headrest body 1. In this embodiment, the circular groove 27 is used for the circumferential positioning of the support frame 3, so that the headrest body 1 can make a rotational movement around the support frame 3.

[0044] The angle adjustment mechanism 2, as Figure 1 shown, is fixedly connected to the headrest body 1 and is rotatably connected to the support frame 3. The angle adjustment mechanism 2 includes a fixed housing 5, a pawl 6, a ratchet 7, a reset member 8, and an elastic clamping member 9.

[0045] The fixed housing 5, as Figure 1 and Figure 2 shown, is fixedly connected to the headrest body 1. The fixed housing 5 is composed of a first fixed piece 24 and a second fixed piece 25. The first fixed piece 24 and the second fixed piece 25 are respectively sleeved on the support frame 3 and placed in the accommodation frame 28 inside the headrest body 1, jointly forming an accommodation interval that can accommodate components such as the pawl 6 and the ratchet 7. Specifically, a pair of screw holes corresponding up and down are respectively provided on these two fixed pieces. Through these screw holes, the first fixed piece 24 and the second fixed piece 25 can be fixedly connected together with screws to form an integral body.

[0046] The pawl 6, as Figure 1 、 Figures 2 to 6As shown, its pawl 6 is rotatably connected to the headrest body 1 around the rotating shaft 14. It includes a toothed arm 11 and an abutting arm 12, and the two are integrally formed into a U-shaped groove 13 structure. The rotating shaft 14 passes through the connection between the toothed arm 11 and the abutting arm 12 and is fixedly connected to both side walls of the fixed housing 5. Specifically, the rotating shaft 14 is a plug pin shaft, and the plug pin shaft passes through the connection between the toothed arm 11 and the abutting arm 12 and is fixedly connected between the first fixing piece 24 and the second fixing piece 25.

[0047] A ratchet wheel 7, which is fixedly connected to the support frame 3. The ratchet wheel 7 is provided with one-way teeth, and the pawl 6 is meshed and cooperated with the ratchet wheel 7. The ratchet wheel 7 is provided with a ratchet part 15 with one-way teeth, a first protruding end 16 and a second protruding end 17. The ratchet part 15 is meshed and cooperated with the toothed arm 11, and the first protruding end 16 and the second protruding end 17 are located on both sides of the ratchet part 15 to form a structure for clamping the ratchet part 15. The first protruding end 16 abuts against the U-shaped groove 13 and is adapted to slide along the U-shaped groove 13 during the adjustment of the headrest angle.

[0048] The headrest body 1 is adapted to rotate unidirectionally from a first position to a second position relative to the support frame 3. During the rotation process, the elastic clamping member 9 drives the pawl 6 to be meshed with the ratchet wheel 7 through its deformation force. The headrest body 1 has two specific rotatable positions, namely the first position and the second position, and these two positions respectively correspond to different tilting angles of the headrest, such as Figure 3 As shown, the first position corresponds to the initial tilting angle, such as Figure 4 As shown, the second position corresponds to the maximum effective rotation angle. The headrest body 1 can rotate between the first position and the second position, thereby allowing the user to adjust the tilting angle of the headrest according to needs. In this embodiment, the first position is an obtuse angle formed by the headrest body 1 and the support leg 18 of the support frame 3 in the direction away from the human body, and the second position is that the headrest body 1 is perpendicular to the ground, and the rotation direction is clockwise rotation.

[0049] When the headrest body 1 is in the first position, the first protruding end 16 abuts against the groove wall of the U-shaped groove 13 close to the abutting arm 12. The abutting arm 12 abuts against the side wall of the fixed housing 5 under the pressure of the first protruding end 16. The top end of the toothed arm 11 abuts against the second protruding end 17, and the ratchet portion 15 meshes with the toothed arm 11. When the headrest body 1 is in the second position, the first protruding end 16 abuts against the groove wall of the U-shaped groove 13 close to the toothed arm 11, and the abutting arm 12 abuts against the side wall of the fixed housing 5. In this embodiment, when the headrest body 1 is in the first position, the first protruding end 16 of the ratchet 7 abuts against the groove wall of the U-shaped groove 13 close to the abutting arm 12, so that the abutting arm 12 abuts against the inner wall of the fixed housing 5 under the pressure of the first protruding end 16. At the same time, the top end of the toothed arm 11 of the pawl 6 also abuts against the second protruding end 17, forming a stable support structure, thus ensuring the stability and safety of the headrest at this angle. When the headrest body 1 is adjusted to the second position, the position of the first protruding end 16 changes and instead abuts against the groove wall of the U-shaped groove 13 close to the toothed arm 11. At this time, the abutting arm 12 still maintains the abutting state with the fixed housing 5 to ensure the stable state at the second position.

[0050] The reset member 8, such as Figure 2 shown, is sleeved on the support frame 3, one end of which is connected to the ratchet 7 and the other end is connected to the fixed housing 5. Specifically, the second fixing piece 25 is provided with a through hole for one end of the reset member 8 to be inserted, and the other end of the reset member 8 is connected to the ratchet 7. Since the ratchet 7 is fixedly connected to the support frame 3, the fixed housing 5 remains stationary relative to the headrest. When the headrest body 1 returns from the maximum effective rotation angle to the initial angle, therefore the reset member 8 can provide a torsion force to the headrest body 1 as a restoring force. As Figure 5 and Figure 6 shown, after the headrest body 1 rotates to the second position, continue to rotate the headrest body 1 along the original direction, the elastic latch 9 crosses the dead point position, so that the deformation force of the elastic latch 9 fails, and the pawl 6 and the ratchet 7 are disengaged. The headrest body 1 is subjected to the torsion force of the reset member 8 and rotates back to the first position in the reverse direction, so that the deformation force of the elastic latch 9 is restored, the elastic latch 9 releases energy and drives the pawl 6 to re-engage with the ratchet 7, completing the reset adjustment of the angle. Specifically, the reset member 8 is a torsion spring.

[0051] In this embodiment, by adding a reset member 8, the convenience and practicality of the bathtub headrest are further improved. One end of the reset member 8 is connected to the fixed housing 5, and the other end is connected to the ratchet wheel 7 fixedly mounted on the support frame 3. This connection method enables the reset member 8 to store or release elastic potential energy when the headrest body 1 rotates. When the user adjusts the headrest body 1 from the initial position (the first position) to the maximum effective angle (the second position), the reset member 8 will deform accordingly and store a certain amount of elastic potential energy. When the user wishes to reset the headrest body 1 to the initial position, simply continue to rotate the headrest body 1 in the original direction. At this time, the elastic catch 9 crosses the dead point position and fails, and the pawl 6 disengages from the ratchet wheel 7 and no longer hinders the rotation of the headrest. Subsequently, the reset member 8 releases the previously stored elastic potential energy, which acts on the headrest body 1 in the form of torque, driving it to rotate back to the initial position (the first position) in the reverse direction. In this reset operation, the reset process of the reset member 8 is stable and rapid. The user only needs to simply rotate the headrest past the dead point to trigger the automatic reset mechanism, improving the convenience of use.

[0052] The elastic catch 9, such as Figures 3 to 6 shown, one end of which is connected to the fixed housing 5 and the other end is connected to the pawl 6. Specifically, as Figure 1 shown, the elastic catch 9 is a special-shaped card pin. The main body of the special-shaped card pin is a U-shaped structure, and its two ends are perpendicular to the plane of the U-shaped structure respectively. This structure of the elastic catch 9 not only provides sufficient strength to withstand the force required to connect the toothed arm 11 of the fixed housing 5 and the pawl 6, but also allows deformation when subjected to an external force. Therefore, the elastic catch 9 is usually made of a metal material with a certain elastic modulus, such as spring steel or stainless steel, etc. These materials can undergo elastic deformation when subjected to an external force and return to their original state after the external force disappears, thereby endowing the elastic catch 9 with the characteristic of elastic torque. One end of the elastic catch 9 passes through the first fixing piece 24, and the other end passes through the toothed arm 11 of the pawl 6. Define the connection point of the elastic catch 9 and the fixed housing 5 as point A, and define the connection point of the elastic catch 9 and the toothed arm 11 as point B. When the headrest body 1 is between the first position and the second position, the position of point B is higher than that of point A in the direction perpendicular to the ground, and the pawl 6 is engaged with the ratchet wheel 7. In this embodiment, by designing one end of the elastic catch 9 to be connected to the fixed housing 5 and the other end to be connected to the toothed arm 11 of the pawl 6, and keeping point B higher than point A in the direction perpendicular to the ground between the first position and the second position, the deformation force of the elastic catch 9 is used to ensure the engagement of the pawl 6 and the ratchet wheel 7. Among them, the position of point B is higher than that of point A in the direction perpendicular to the ground. This position difference causes a certain bending or torsion between the connection points A and B of the elastic catch 9, thereby accumulating elastic potential energy. When the pawl 6 needs to be engaged with the ratchet wheel 7, this accumulated elastic potential energy will be converted into the power to push the pawl 6 closer to the ratchet wheel 7, ensuring that the two can be tightly engaged.

[0053] The working principle of the angle adjustment mechanism 2 reset is as follows: As Figures 3 to 6 shown, define the connection point of the pawl 6 and the rotating shaft 14 as C. As Figure 4 shown, when points A, B, and C are on a straight line, the elastic clamping member 9 is in the dead point position; as Figure 5 shown, when the headrest body 1 continues to rotate the headrest body 1 in the original direction at the second position, the line connecting points A, B, and C is an obtuse angle with the opening facing upward, and the deformation force of the elastic clamping member 9 fails, and the pawl 6 is disengaged from the ratchet wheel 7. As Figure 6 shown, the headrest body 1 is subjected to the torsional force of the reset member 8 and rotates in the opposite direction back to the first position. As Figure 3 shown, the line connecting points A, B, and C is an obtuse angle with the opening facing downward, and the deformation force of the elastic clamping member 9 is restored, driving the pawl 6 to re-engage with the ratchet wheel 7.

[0054] In this embodiment, through the action of the elastic clamping member 9 at the dead point position and the mechanism of the pawl 6 disengaging from and re-engaging with the ratchet wheel 7, the headrest body 1 can realize rotation when it reaches the maximum effective rotation angle. When the headrest body 1 rotates to the second position, that is, the maximum effective rotation angle, when points A, B, and C are on a straight line, the elastic clamping member 9 is in the dead point position. At this time, continue to rotate the headrest body 1 in the original direction, cross the dead point position, and the line connecting points A, B, and C is an obtuse angle with the opening facing downward, and the deformation force of the elastic clamping member 9 fails, and the ratchet tooth portion 15 is disengaged from the tooth-shaped arm 11 and cannot be engaged. Since one end of the reset member 8 is connected to the ratchet wheel 7 and the other end is connected to the fixed housing 5, the rotation of the headrest body 1 increases the torsional force of the reset member 8. At the moment when the ratchet tooth portion 15 is disengaged from the tooth-shaped arm 11, the torsional force of the reset member 8 causes the headrest body 1 to rotate in the opposite direction to the first position, and the first protruding end 16 contacts and presses the abutting arm 12 again, causing the elastic clamping member 9 to overcome the dead point position and return below the dead point position. At this time, the line connecting points A, B, and C is an obtuse angle with the opening facing upward, and the elastic clamping member 9 restores the deformation force, pushing the pawl 6 to re-engage with the ratchet wheel 7, thereby ensuring that the headrest body 1 can return to the initial position.

[0055] The lifting structure, as Figure 2 and Figure 7 shown, is fixedly connected to the bathtub, and the support foot 18 is connected to the bathtub through the lifting structure. The support foot 18 is provided with a plurality of cutting grooves 19, and the cutting grooves 19 are arranged at intervals along the axial direction of the support foot 18. The lifting structure includes a support seat 20 and a limit block 21. The support seat 20 is installed on the bathtub, and a hollow channel for the support foot 18 to pass through is provided in the support seat 20; the limit block 21 is arranged radially along the support seat 20 and forms a stop fit by inserting into the cutting groove 19. Specifically, the bathtub is provided with two round holes for installing the lifting structure. In this embodiment, the height adjustment of the headrest body 1 is realized through the cooperation of the limit block 21 and the cutting groove 19. The lifting structure is a prior art and will not be elaborated in detail.

[0056] The present application provides a headrest for a bathtub. Through the angle adjustment mechanism 2, users can easily adjust the angle of the headrest body 1 to meet different lying requirements and provide a more comfortable bathing experience. The angle adjustment mechanism 2 combines components such as a pawl 6, a ratchet wheel 7, and an elastic clamping member 9. The pawl 6 is connected to the headrest body 1 around a rotating shaft 14, and the ratchet wheel 7 adopts a one-way tooth design and is fixedly installed on the support frame 3. When the user adjusts the headrest angle according to the need, the headrest body 1 drives the rotating shaft 14 to rotate relative to the support frame 3, thereby driving the pawl 6 to change its position, causing the pawl 6 to disengage from the ratchet wheel 7, compressing the elastic clamping member 9. The elastic clamping member 9 uses its deformation force to prompt the pawl 6 to slide along the tooth back of the ratchet wheel 7 and smoothly insert into the next tooth groove, realizing the one-way intermittent rotation of the headrest body 1. This design not only ensures the stable support of the headrest at any selected angle but also effectively prevents accidental reversal caused by the body weight or external force, ensuring the safety and stability of use.

[0057] The descriptions of the above specification and embodiments are used to explain the protection scope of the present utility model, but do not constitute a limitation to the protection scope of the present utility model. Through the inspiration of the present utility model or the above embodiments, those of ordinary skill in the art, in combination with common general knowledge, ordinary technical knowledge in the art, and / or the prior art, can obtain modifications, equivalent replacements, or other improvements to the embodiments of the present utility model or some of its technical features through logical analysis, reasoning, or limited experiments, and all should be included within the protection scope of the present utility model.

Claims

1. A headrest for a bathtub, characterized in that Comprising: A headrest body (1); A support frame (3), which is rotatably connected to the headrest body (1) and mounts the headrest body (1) on a bathtub; And An angle adjustment mechanism (2), which includes a pawl (6), a ratchet wheel (7) and an elastic clamping member (9). The ratchet wheel (7) is fixedly connected to the support frame (3). The ratchet wheel (7) is provided with one-way teeth. The pawl (6) is rotatably connected to the headrest body (1) around a rotation axis (14), and the pawl (6) is meshed and cooperated with the ratchet wheel (7); One end of the elastic clamping member (9) is connected to the headrest body (1), and the other end is connected to the pawl (6); The headrest body (1) is adapted to rotate unidirectionally from a first position to a second position relative to the support frame (3). During this process, the pawl (6) disengages from the one-way teeth of the ratchet wheel (7), and the elastic clamping member (9) stores energy. When the pawl (6) corresponds to the next tooth groove position on the ratchet wheel (7), the elastic clamping member (9) releases energy to drive the pawl (6) and the ratchet wheel (7) to re-engage.

2. The headrest for bathtub according to claim 1, characterized in that, The angle adjustment mechanism (2) further includes a reset member (8). The reset member (8) is sleeved on the support frame (3). One end of the reset member (8) is connected to the ratchet wheel (7), and the other end is connected to the headrest body (1); After the headrest body (1) rotates to the second position, continue to rotate the headrest body (1) in the original direction, and the elastic clamping member (9) crosses the dead point position, so that the deformation force of the elastic clamping member (9) fails, and the pawl (6) and the ratchet wheel (7) are disengaged. The headrest body (1) is subjected to the torsional force of the reset member (8) and rotates back to the first position in the reverse direction, so that the deformation force of the elastic clamping member (9) is restored. The elastic clamping member (9) releases energy and drives the pawl (6) and the ratchet wheel (7) to re-engage to complete the reset adjustment of the angle.

3. The headrest for bathtub according to claim 2, characterized in that, The pawl (6) includes a toothed arm (11) and an abutting arm (12). The toothed arm (11) and the abutting arm (12) are integrally formed into a U-shaped groove (13) structure. The rotation axis (14) penetrates through the connection between the toothed arm (11) and the abutting arm (12) and is fixedly connected to the two side walls of the headrest body (1); The ratchet wheel (7) is provided with a ratchet tooth portion (15), a first protruding end (16) and a second protruding end (17). The ratchet tooth portion (15) is meshed and cooperated with the toothed arm (11). The first protruding end (16) and the second protruding end (17) are located on both sides of the ratchet tooth portion (15) to form a structure for clamping the ratchet tooth portion (15). The first protruding end (16) is adapted to move in the U-shaped groove (13) during the angle adjustment of the headrest body (1).

4. The headrest for bathtub according to claim 3, characterized in that, When the headrest body (1) is in the first position, the first protruding end (16) abuts against the groove wall of the U-shaped groove (13) close to the abutting arm (12). The abutting arm (12) abuts against the side wall of the headrest body (1) under the pressure of the first protruding end (16). The top end of the toothed arm (11) abuts against the second protruding end (17), and the ratchet part (15) meshes with the toothed arm (11). When the headrest body (1) is in the second position, the first protruding end (16) abuts against the groove wall of the U-shaped groove (13) close to the toothed arm (11), and the abutting arm (12) abuts against the side wall of the headrest body (1).

5. The headrest for bathtub according to claim 3, characterized in that, One end of the elastic clamping member (9) is connected to the headrest body (1), and the other end is connected to the toothed arm (11). Define the connection point of the elastic clamping member (9) and the headrest body (1) as A, and define the connection point of the elastic clamping member (9) and the toothed arm (11) as B. When the headrest body (1) is between the first position and the second position, the position of point B is higher than that of point A in the direction perpendicular to the ground, and the pawl (6) meshes with the ratchet wheel (7).

6. The headrest for bathtub according to claim 5, characterized in that it is defined as The connection point of the pawl (6) and the rotating shaft (14) is C. When points A, B, and C are on a straight line, the elastic clamping member (9) is in the dead point position. When the headrest body (1) continues to rotate in the original direction at the second position, the connection line of points A, B, and C is an obtuse angle with the opening facing upward, and the deformation force of the elastic clamping member (9) fails. The pawl (6) is disengaged from the ratchet wheel (7). The headrest body (1) is subjected to the torsion force of the reset member (8) and rotates in the opposite direction to the first position. The connection line of points A, B, and C is an obtuse angle with the opening facing downward, and the deformation force of the elastic clamping member (9) is restored, driving the pawl (6) to mesh with the ratchet wheel (7) again.

7. The headrest for bathtub according to claim 1, characterized in that, The cross-sectional shape of the support frame (3) is circular. The headrest body (1) is provided with a circular groove (27) matching the cross-sectional shape of the support frame (3). The support frame (3) passes through the circular groove (27) and is rotatably connected to the headrest body (1).

8. The headrest for bathtub according to claim 1, characterized in that, It further includes a lifting structure fixed to the bathtub. The support frame (3) is a U-shaped structure with two support feet (18), and the support feet (18) are connected to the bathtub through the lifting structure.

9. The headrest for bathtub according to claim 8, characterized in that, The support feet (18) are provided with a plurality of cut grooves (19), and the cut grooves (19) are arranged at intervals along the axial direction of the support feet (18). The lifting structure includes a support seat (20) and a limit block (21). The support seat (20) is installed on the bathtub, and a hollow channel for the support feet (18) to pass through is provided in the support seat (20). The limit block (21) is arranged radially along the support seat (20) and forms a stop fit by inserting into the cut grooves (19).

10. A headrest for a bathtub according to claim 1, characterized in that, The headrest body (1) fits the curve of the head and neck.

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