An electric four-way adjusting headrest mechanism for a car seat

Abstract

The utility model belongs to the technical field of car seat headrest, specifically relates to a kind of car seat electric four-way adjusting headrest mechanism, including being used for being inserted in the two first headrest rod and second headrest rod of opposite parallel arrangement in car seat top, first headrest rod and second headrest rod are connected with headrest assembly, first headrest rod, second headrest rod and headrest assembly outside are respectively covered with front cover and back cover, headrest assembly is provided with lifting mechanism, and the lifting mechanism is driven to adjust height on first headrest rod and second headrest rod, back cover is provided with translation mechanism, and the translation mechanism is driven to move back and forth on headrest assembly, by the lifting mechanism and translation mechanism that headrest mechanism inside is provided, the four direction adjustment of electric up and down back of headrest can be realized, headrest mechanism structure is compact, and it occupies small space, and it is lighter, improves the comfort of user, and adjusting mechanism can be adapted to most seats on market, and universality is better.

Description

Technical Field

[0001] This utility model belongs to the field of automotive seat headrest technology, specifically relating to an electric four-way adjustable headrest mechanism for automotive seats. Background Technology

[0002] With the rapid development of the national economy and the continuous improvement of people's living standards, the pursuit of a comfortable and convenient life has led to the increasing popularity of automobiles. People who pursue a high-quality life are increasingly looking forward to the user-friendly and convenient design of automobile functions.

[0003] As the component that passengers come into contact with most frequently in a car, the car seat directly affects their comfort. The headrest provides good head support, and different passengers have different needs for the height and fore-aft position of the headrest at different times, so the headrest adjustment function is frequently used.

[0004] Currently, most commonly used electric headrest adjustment mechanisms in car seats are located inside the seat back, occupying internal space and affecting the arrangement of ventilation and massage mechanisms. Furthermore, while headrests located at the top of the car seat are generally intended to support the occupant's head and alleviate fatigue, their primary function is to protect the occupant's neck from injury in the event of a collision. However, most currently used car seat headrests can only be adjusted vertically according to the occupant's head position, not horizontally. Therefore, in a collision, the occupant's head, under the impact force, inertia causes it to move backward and come into contact with the headrest. Although the headrest provides some support and protection to the neck, the backward inertia of the head often results in whiplash injuries to the occupant's neck. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an electric four-way adjustable headrest mechanism for automobile seats. By incorporating a lifting mechanism and a translation mechanism within the headrest mechanism, the headrest can be electrically adjusted in four directions: up, down, forward, and backward, thereby solving the problems mentioned in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an electric four-way adjustable headrest mechanism for a car seat, comprising a first headrest rod and a second headrest rod that are inserted into the top of the car seat and are arranged in parallel. A headrest assembly is connected to the first headrest rod and the second headrest rod. A front cover and a rear cover are respectively provided on the outer sides of the first headrest rod, the second headrest rod, and the headrest assembly. A lifting mechanism is provided on the headrest assembly to drive it to adjust its height on the first headrest rod and the second headrest rod. A translation mechanism is provided on the rear cover to drive it to move back and forth on the headrest assembly.

[0007] Preferably, the lifting mechanism includes a lifting motor mounted on the headrest assembly, the output end of the lifting motor is connected to a first threaded rod, a support rod is sleeved on the first threaded rod, and the two ends of the support rod are fixedly connected to the top ends of the first headrest rod and the second headrest rod, respectively.

[0008] Preferably, the support rod is provided with a first threaded sleeve that matches the thread on the first threaded rod.

[0009] Preferably, the headrest assembly has an internal mounting groove, and headrest rod guide sleeves are provided at both ends of the mounting groove. The two headrest rod guide sleeves are slidably connected to the rods of the first headrest rod and the second headrest rod, respectively.

[0010] Preferably, the translation mechanism includes a translation motor mounted on the rear cover, the output end of the translation motor is connected to a second threaded rod, a fixing block is sleeved on the second threaded rod, and the fixing block is fixedly connected to the headrest assembly by bolts.

[0011] Preferably, the fixing block is provided with a second threaded sleeve that matches the thread on the second threaded rod.

[0012] Preferably, the front cover and the rear cover are fitted onto the outside of the headrest assembly and are fixedly connected by bolts. Both sides of the bottom of the front cover and the rear cover are provided with clearance grooves, and the two clearance grooves are movably connected to the rods of the first headrest rod and the second headrest rod, respectively.

[0013] Preferably, the headrest assembly is provided with a positioning hole, and the back cover is provided with a connecting rod that matches the positioning hole.

[0014] Preferably, a fixing rod matching the inner diameter of the connecting rod is provided inside the front cover. Preferably, motor harnesses are connected to both the lifting motor and the translation motor, and the two motor harnesses pass through the inside of the first headrest rod and the second headrest rod respectively and are connected to the backrest harness.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: By incorporating a lifting mechanism and a translation mechanism within the headrest mechanism, the headrest can be electrically adjusted in four directions: up, down, forward, and backward. The headrest mechanism has a compact structure and occupies little space.

[0016] Its lighter weight improves user comfort, and its adjustment mechanism can be adapted to most seats on the market, making it more versatile.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 A three-dimensional structural diagram of an electrically adjustable four-way headrest mechanism for a car seat. Figure 1 .

[0019] Figure 2 A three-dimensional structural diagram of an electrically adjustable four-way headrest mechanism for a car seat. Figure 2 .

[0020] Figure 3 A three-dimensional structural breakdown of an electric four-way adjustable headrest mechanism for a car seat Figure 1 .

[0021] Figure 4 A three-dimensional structural breakdown of an electric four-way adjustable headrest mechanism for a car seat Figure 2 .

[0022] Figure 5 A cross-sectional view of an electrically adjustable four-way headrest mechanism for a car seat. Figure 1 .

[0023] Figure 6 A cross-sectional view of an electrically adjustable four-way headrest mechanism for a car seat. Figure 2 .

[0024] Figure 7 This is a schematic diagram of the three-dimensional structure of a car seat's electrically adjustable four-way headrest mechanism.

[0025] Figure 8 This is an exploded three-dimensional view of the headrest assembly of an electric four-way adjustable headrest mechanism for a car seat.

[0026] Figure 9 This is a three-dimensional structural diagram of the lifting and translation mechanisms of an electric four-way adjustable headrest mechanism for a car seat.

[0027] Figure 10 This is an exploded three-dimensional diagram of the lifting and translation mechanisms of an electric four-way adjustable headrest mechanism for a car seat.

[0028] Figure 11 This is a three-dimensional structural diagram of the lifting mechanism of an electric four-way adjustable headrest for a car seat.

[0029] Figure 12 This is a three-dimensional structural diagram of the translation mechanism of an electric four-way adjustable headrest mechanism for a car seat.

[0030] In the diagram: 1. First headrest rod; 2. Second headrest rod; 3. Headrest assembly; 31. Mounting groove; 32. Headrest rod guide sleeve; 33. Positioning hole; 4. Front cover; 41. Fixing rod; 5. Rear cover; 51. Connecting rod; 6. Lifting mechanism; 61. Lifting motor; 62. First threaded rod; 63. Support rod; 631. First threaded sleeve; 7. Translation mechanism; 71. Translation motor; 72. Second threaded rod; 73. Fixing block; 731. Second threaded sleeve; 8. Clearance groove; 9. Motor wiring harness. Detailed Implementation

[0031] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0032] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an electric four-way adjustable headrest mechanism for a car seat includes two parallel headrest rods 1 and 2 that are inserted into the top of the car seat. A headrest assembly 3 is connected to the first headrest rod 1 and the second headrest rod 2. A front cover 4 and a rear cover 5 are respectively provided on the outer sides of the first headrest rod 1, the second headrest rod 2 and the headrest assembly 3. A lifting mechanism 6 is provided on the headrest assembly 3 to drive it to adjust its height on the first headrest rod 1 and the second headrest rod 2. A translation mechanism 7 is provided on the rear cover 5 to drive it to move back and forth on the headrest assembly 3.

[0033] This invention proposes an electrically adjustable four-way headrest mechanism for automotive seats, providing drivers and passengers with ultimate comfort and personalized support adjustment. The headrest mechanism primarily comprises two parallel headrest rods 1 and 2, which are inserted into the top of the automotive seat. The first headrest rods 1 and 2, serving as the supporting framework for the entire headrest mechanism, are made of high-strength, lightweight materials such as aluminum alloy or stainless steel to ensure both durability and flexibility. An appropriate distance is maintained between the first headrest rods 1 and 2 to accommodate and stably support the headrest assembly 3, while ensuring smoothness during adjustment.

[0034] The first headrest rod 1, the second headrest rod 2, and the headrest assembly 3 are respectively covered with a front cover 4 and a rear cover 5 to protect the internal moving mechanism and reduce noise transmission.

[0035] After this mechanism is assembled as a whole, the front cover 4 and the rear cover 5 are covered with headrest foam, and the headrest foam is then wrapped with a headrest cover. The specific shape and style of the foam and cover are matched according to the style of the car seat to meet diverse market demands.

[0036] The headrest assembly 3 is equipped with a lifting mechanism 6 that drives it to adjust its height on the first headrest rod 1 and the second headrest rod 2. The lifting mechanism 6 is electrically driven and achieves the up and down movement of the headrest assembly through a built-in motor and transmission device.

[0037] The rear cover 5 is equipped with a translation mechanism 7 that drives it to move back and forth on the headrest assembly 3. The translation mechanism 7 is also electrically driven, using a motor and guide rails to move the headrest assembly back and forth. The design of the translation mechanism takes into full account the different body sizes and sitting habits of users, providing a large adjustment range to ensure that every passenger can find the most suitable headrest position.

[0038] This electric four-way adjustable headrest mechanism for car seats uses mechanical design and electric drive technology to achieve flexible adjustment of the headrest in four directions: height and fore-aft, providing a more comfortable and personalized riding experience for drivers and passengers.

[0039] Combination Figure 5 , Figure 7 , Figure 10 and Figure 11 As shown, the lifting mechanism 6 includes a lifting motor 61 mounted on the headrest assembly 3. The lifting motor 61 is the power source for the entire lifting mechanism 6, employing a high-efficiency, low-noise electric motor to ensure both speed and quietness during adjustment, without causing any disturbance to passengers. The lifting motor 61 can operate stably for extended periods, ensuring consistent headrest height adjustment functionality.

[0040] The output end of the lifting motor 61 is connected to a first threaded rod 62, which is a transmission component in the lifting mechanism 6. The first threaded rod 62 converts the rotational motion of the lifting motor 61 into linear motion. The first threaded rod 61 ensures accuracy and stability during transmission. A support rod 63 is fitted onto the first threaded rod 62, and both ends of the support rod 63 are fixedly connected to the top ends of the first headrest rod 1 and the second headrest rod 2, respectively. The support rod 63 bears the heavy responsibility of transmitting lifting force and supporting the headrest assembly 3. The support rod 63 ensures that it will not deform or shake during lifting. The two ends of the support rod 63 are fixedly connected to the top ends of the first headrest rod 1 and the second headrest rod 2, respectively. This connection method ensures the firmness and reliability of the support rod 63, so that the headrest assembly 3 can remain stable during lifting.

[0041] Combination Figure 5 , Figure 8 , Figure 9 and Figure 10As shown, to achieve a stable connection and smooth transmission between the support rod 63 and the first threaded rod 62, a first threaded sleeve 631 is provided on the support rod 63, which matches the thread on the first threaded rod 62. The internal thread of the first threaded sleeve 631 engages with the external thread of the first threaded rod 62, ensuring stability and accuracy during transmission. This not only allows the support rod 63 to be securely fitted onto the first threaded rod 62, but also ensures that under the drive of the lifting motor 61, the rotational motion of the first threaded rod 62 can be smoothly converted into the linear motion of the support rod 63, thereby driving the headrest assembly 3 to adjust its height.

[0042] Combination Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the headrest assembly 3 has a mounting groove 31 inside, which provides mounting space for subsequent mechanical transmission components. The mounting groove 31 ensures that the transmission components can be securely and smoothly installed therein.

[0043] The mounting groove 31 has headrest rod guide sleeves 32 inside both ends, and two lead screw sleeves 32 are slidably connected to the rod bodies of the first headrest rod 1 and the second headrest rod 2, respectively. These two lead screw sleeves 32 are key components connecting the headrest assembly 3 to the first headrest rod 1 and the second headrest rod 2. The internal structure of the lead screw sleeves 32 is designed with smooth surfaces that match the rod bodies of the first headrest rod 1 and the second headrest rod 2 to achieve a sliding connection with the rod bodies. This allows the headrest assembly 3 to move smoothly up and down or back and forth on the first headrest rod 1 and the second headrest rod 2, while maintaining the stability and reliability of the connection.

[0044] Two lead screw sleeves 32 are slidably connected to the bodies of the first headrest rod 1 and the second headrest rod 2, respectively. This ensures the stability of the headrest assembly 3 during adjustment and guarantees low friction and high durability during transmission.

[0045] Combination Figure 6 , Figure 9 , Figure 10 and Figure 12 As shown, the translation mechanism 7 includes a translation motor 71 mounted on the rear cover 5. The translation motor 71 serves as the power source for the entire translation mechanism 7, employing efficient, low-noise electric motor technology to ensure both rapid and quiet movement of the headrest, without disturbing passengers. The translation motor 71 can operate stably for extended periods, ensuring consistent front-to-back adjustment of the headrest.

[0046] The output end of the translation motor 71 is connected to a second threaded rod 72, which is a transmission component in the translation mechanism 7. The second threaded rod 72 converts the rotational motion of the translation motor 71 into linear motion, thereby driving the front cover 4 and the rear cover 5 to move back and forth. The threads on the surface of the second threaded rod 72 are clear and uniform, ensuring accuracy and stability during transmission. A fixing block 73 is fitted onto the second threaded rod 72. The fixing block 73 is a key component connecting the second threaded rod 72 and the headrest assembly 3. The fixing block 73 is fixedly mounted on the headrest assembly 3. The translation of the second threaded rod 72 drives the front cover 4 and the rear cover 5 to move on the headrest assembly 3, ensuring that no deformation or shaking occurs during the translation process.

[0047] The fixing block 73 is fixedly connected to the headrest assembly 3 by bolts. This secure and reliable connection ensures the stability and safety of the headrest assembly 3 during translation. The bolts were carefully selected, using high-strength, corrosion-resistant materials, and the tightening torque was strictly controlled to guarantee the strength and durability of the connection.

[0048] Combination Figure 4 , Figure 6 , Figure 10 and Figure 12 As shown, the fixing block 73 is provided with a second threaded sleeve 731 that matches the thread on the second threaded rod 72.

[0049] Specifically, the internal thread of the second threaded sleeve 731 is tightly engaged with the external thread of the second threaded rod 72, ensuring stability and accuracy during transmission. The fixing block 73 is fixed on the headrest assembly 3. Driven by the translation motor 71, the rotational motion of the second threaded rod 72 can be smoothly converted into the linear motion of the translation motor 71, thereby moving the front cover 4 and the rear cover 5 back and forth.

[0050] The fixing block 73 is fixedly connected to the headrest assembly 3 by bolts. This connection is both sturdy and reliable, ensuring the stability and safety of the headrest assembly 3 during vertical movement. The bolts were also carefully selected, using high-strength, corrosion-resistant materials, and the tightening torque was strictly controlled to guarantee the strength and durability of the connection.

[0051] During the translation process, the headrest's range of motion is precisely calculated and set to ensure that passengers can find the most suitable headrest position according to their body size and sitting habits. At the same time, the translation mechanism 7 is very simple and convenient to operate; passengers can easily adjust the headrest forward and backward using the control panel or remote control.

[0052] Combination Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the headrest assembly 3 is provided with a positioning hole 33, and the rear cover 5 is provided with a connecting rod 51 that matches the positioning hole 33.

[0053] Specifically, the headrest assembly 3 has positioning holes 33, which are key to the connection between the headrest assembly and the back cover 5. Inside the back cover 5 are connecting rods 51 that match the positioning holes 33. Through machining and assembly, these connecting rods 51 slide and match the positioning holes 33, thus achieving the connection between the headrest assembly and the back cover 5.

[0054] The design of the positioning hole 33 and the connecting rod 51 not only ensures the stability of the headrest assembly 3 during translation, but also allows the headrest assembly 3 to be easily installed and removed. This facilitates passengers in adjusting the position of the headrest according to their personal needs, and also makes it easier to repair and replace the headrest assembly 3.

[0055] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the front cover 4 has a fixing rod 41 inside that matches the inner diameter of the connecting rod 51.

[0056] To further enhance the stability and robustness of the headrest assembly, a fixing rod 41 matching the inner diameter of the connecting rod 51 is also provided inside the front cover 4. These fixing rods 41 cooperate with the connecting rod 51 to form a more stable connection structure. The design of the fixing rods 41 takes into account the selection of materials and processing precision to ensure their fit with the connecting rod 51 and their durability for long-term use. The cooperation between the fixing rods 41 and the connecting rod 5 allows the front cover 4 and the rear cover 5 to form a whole, enabling them to slide back and forth on the headrest assembly 3.

[0057] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, both the lifting motor 61 and the translation motor 71 are connected to motor harnesses 9. The two motor harnesses 9 pass through the inside of the first headrest rod 1 and the second headrest rod 2 and are connected to the backrest harness.

[0058] Specifically, the lifting motor 61 drives the headrest to move vertically to accommodate passengers of different heights; while the translation motor 71 controls the headrest's fine-tuning on the horizontal plane, further optimizing the riding experience. The two motor harnesses 9 are cleverly designed with space utilization and safety in mind. They are not exposed but cleverly concealed within the seat frame, passing through the sturdy rods of the first headrest rod 1 and the second headrest rod 2. These two headrest rods not only provide a stable support structure for the headrests but also have dedicated wiring channels inside, allowing the motor harnesses 9 to extend smoothly and unobstructed until they seamlessly connect with the backrest wiring system in the seat back.

[0059] The backrest wiring harness, as the backbone of the entire seat electrical system, not only gathers signals and power from the lifting motor 61 and the translation motor 71, but also connects to various functional modules such as seat heating, ventilation, and massage, forming a highly integrated control network. In this way, the driver or passenger can easily personalize the headrest position and other seat functions through the control panel on the side of the seat, enjoying the convenience and comfort brought by technology.

[0060] This internal wiring design also greatly enhances the aesthetics and safety of the seat, avoiding the wear and tear risks associated with exposed wiring harnesses, while also providing additional protection for the overall electrical safety of the vehicle. In summary, the precise coordination between the lifting motor 61, the translation motor 71, and the motor wiring harness 9 is a key manifestation of the intelligent and user-friendly design of modern automotive seats.

[0061] This invention represents a preferred embodiment of the present invention, but its scope of protection is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of this invention, shall be covered within the scope of protection of this invention.

Claims

1. A four-way adjustable electric headrest mechanism for a car seat, comprising a first headrest rod (1) and a second headrest rod (2) for inserting into the top of the car seat and arranged parallel to each other, a headrest assembly (3) connected to the first headrest rod (1) and the second headrest rod (2), and a front cover (4) and a rear cover (5) respectively covering the outer sides of the first headrest rod (1), the second headrest rod (2) and the headrest assembly (3), characterized in that, The headrest assembly (3) is provided with a lifting mechanism (6) that drives it to adjust its height on the first headrest rod (1) and the second headrest rod (2), and the rear cover (5) is provided with a translation mechanism (7) that drives it to move back and forth on the headrest assembly (3).

2. The electric four-way adjustable headrest mechanism for a car seat according to claim 1, characterized in that, The lifting mechanism (6) includes a lifting motor (61) mounted on the headrest assembly (3). The output end of the lifting motor (61) is connected to a first threaded rod (62). A support rod (63) is sleeved on the first threaded rod (62). The two ends of the support rod (63) are fixedly connected to the top ends of the first headrest rod (1) and the second headrest rod (2), respectively.

3. The electric four-way adjustable headrest mechanism for a car seat according to claim 2, characterized in that, The support rod (63) is provided with a first threaded sleeve (631) that matches the thread on the first threaded rod (62).

4. The electric four-way adjustable headrest mechanism for a car seat according to claim 3, characterized in that, The headrest assembly (3) has an internal mounting groove (31), and the two ends of the mounting groove (31) are provided with headrest rod guide sleeves (32). The two headrest rod guide sleeves (32) are slidably connected to the rods of the first headrest rod (1) and the second headrest rod (2), respectively.

5. The electric four-way adjustable headrest mechanism for a car seat according to claim 1, characterized in that, The translation mechanism (7) includes a translation motor (71) mounted on the rear cover (5). The output end of the translation motor (71) is connected to a second threaded rod (72). A fixing block (73) is mounted on the second threaded rod (72). The fixing block (73) is fixedly connected to the headrest assembly (3) by bolts.

6. The electric four-way adjustable headrest mechanism for a car seat according to claim 5, characterized in that, The fixing block (73) is provided with a second threaded sleeve (731) that matches the thread on the second threaded rod (72).

7. A car seat electric four-way adjustable headrest mechanism according to any one of claims 1-6, characterized in that, The front cover (4) and the rear cover (5) are fitted on the outside of the headrest assembly (3) and are fixedly connected by bolts. Both sides of the bottom of the front cover (4) and the rear cover (5) are provided with relief grooves (8). The two relief grooves (8) are movably connected to the rods of the first headrest rod (1) and the second headrest rod (2), respectively.

8. The electric four-way adjustable headrest mechanism for a car seat according to claim 7, characterized in that, The headrest assembly (3) is provided with a positioning hole (33), and the back cover (5) is provided with a connecting rod (51) that matches the positioning hole (33).

9. A four-way adjustable electric headrest mechanism for a car seat according to claim 8, characterized in that, The front cover (4) is equipped with a fixing rod (41) that matches the inner diameter of the connecting rod (51).

10. A car seat electric four-way adjustable headrest mechanism according to claim 9, characterized in that, Both the lifting motor (61) and the translation motor (71) are connected to motor harnesses (9). The two motor harnesses (9) pass through the inside of the first headrest rod (1) and the second headrest rod (2) and are connected to the backrest harness.

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