A self-stretching vehicle-mounted key holder, armrest box and automobile

Abstract

The application discloses a self-stretching vehicle-mounted key holder, a handrail box and a vehicle, which comprises a key holder stretching transmission device, a stretchable key holder and a fixing support, wherein the key holder stretching transmission device is fixed on the upper surface of the fixing support; the stretchable key holder is in transmission connection with the key holder stretching transmission device; and the stretchable key holder is slidably connected along the fixing support. The application can realize electric stretching and folding, can meet the use demand of users for storing keys after stretching, and can meet the full use of users for the limited space in the vehicle after folding.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, and in particular to a self-retractable car key holder, armrest box, and automobile. Background Technology

[0002] As cars become more widely owned by consumers, their demands for car functionality are constantly increasing, and existing cars are now equipped with a car key storage box on the passenger side dashboard.

[0003] Currently, car key storage boxes have a simple design and are mostly open, which is not aesthetically pleasing and makes them difficult to clean after prolonged use due to the accumulation of dust. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a self-retracting vehicle key holder that can be electrically extended and retracted. When extended, it meets the user's need for storing keys, and when retracted, it allows for full utilization of the limited space inside the vehicle.

[0005] This invention proposes a self-retractable vehicle key holder, including a key holder telescopic transmission device, a retractable key holder, and a fixed bracket.

[0006] The key holder telescopic transmission device is fixed to the upper surface of the fixed bracket;

[0007] The retractable key holder is connected to the key holder telescopic transmission device.

[0008] The retractable key holder can slide back and forth along the fixed bracket.

[0009] The key holder telescopic transmission device includes a drive bracket, a gear bracket, a worm gear, a motor, a worm wheel, a vertical helical gear, a horizontal helical gear, a first transmission shaft, and a first transmission gear;

[0010] The drive bracket is fixed to the upper surface of the fixed bracket, the motor is fixed to the middle of the upper surface of the drive bracket, one end of the worm is fixed to the output shaft of the motor and rotates synchronously, the other end of the worm is rotatably connected to the gear bracket, the worm wheel meshes with the worm, the vertical helical gear is coaxially fixed to the upper part of the worm wheel, the upper end of the vertical helical gear is rotatably connected to the gear bracket, the horizontal helical gear meshes with the vertical helical gear, one end of the first transmission shaft is coaxially fixed to the horizontal helical gear, the other end of the first transmission shaft passes through the first rotating support arm of the drive bracket and is coaxially fixed to the first transmission gear, and the first transmission gear meshes with the retractable key holder for transmission.

[0011] The retractable key holder includes a grooved holder body. The rear end of the grooved holder body has connecting plates extending horizontally to the left and right sides. Each connecting plate has a meshing rack screwed onto its lower surface. One meshing rack meshes with a first transmission gear, and the two meshing racks have sliding connecting protrusions on their side ends. The sliding connecting protrusions on each side are slidably connected to the corresponding positions of the fixed bracket.

[0012] The fixed bracket includes a base plate, a first slide rail, and a second slide rail. The first slide rail and the second slide rail are symmetrically fixed on the left and right sides of the upper surface of the base plate, respectively. Sliding connection grooves are respectively opened on the corresponding side walls of the first slide rail and the second slide rail. The sliding connection protrusions of the two meshing racks are respectively accommodated in the sliding connection grooves and slide in cooperation with the sliding connection grooves. The drive bracket is fixed on the front end of the upper surface of the base plate.

[0013] The key holder telescopic transmission device also includes a second transmission gear, a second transmission shaft, a limiting snap ring, a limiting telescopic spring, and a clutch. The upper end of the second transmission shaft has a missing plane. One end of the second transmission shaft passes through the second rotating support arm of the drive bracket and is coaxially fixed to the second transmission gear. The second transmission gear meshes with another meshing rack. The clutch is slidably sleeved on the other end of the second transmission shaft. One end of the clutch is coaxial with a horizontal helical gear and makes limiting transmission contact. The other end of the clutch contacts one end of the limiting telescopic spring, which is sleeved on the second transmission shaft. The other end of the limiting telescopic spring makes limiting contact with the limiting snap ring, which is then fixed in place. Located on the second drive shaft, a limiting telescopic spring ensures that the clutch makes a limiting contact with the horizontal helical gear. When the motor rotates, the first drive shaft rotates synchronously, driving the clutch and the second drive shaft to rotate synchronously, causing the retractable key holder to retract. When the motor stops working, if a person applies excessive external force to the retractable key holder, the clutch is forced to move along the second drive shaft, compressing the limiting telescopic spring. The clutch then disengages from the limiting transmission contact with the horizontal helical gear, preventing damage to the gear transmission mechanism from the external force applied by the person. A support protrusion is provided on the drive bracket below the second drive shaft near the clutch end, and the upper end of the support protrusion is slidably connected to the second drive shaft.

[0014] The inner walls of the sliding connection grooves of the first and second slide rails are respectively provided with a first clamping buffer block and a second clamping buffer block. A positioning switch bracket is fixed on the first rotating support arm, and a positioning switch is provided on the positioning switch bracket. The positioning switch is adjacent to the side wall of the corresponding meshing rack. The positioning switch can be triggered by the positioning protrusion on the meshing rack. After the positioning switch is triggered, it can send a feedback signal to the controller. An adapter plate is fixed on the drive bracket next to the motor. The adapter plate is electrically connected to the motor. The motor is fixed to the middle of the upper surface of the drive bracket through the motor bracket. After receiving the feedback signal from the positioning switch, the controller issues a command to reduce the voltage of the motor through the adapter plate, so that the retractable key holder slows down and stops at the first clamping buffer block and the second clamping buffer block, which can reduce the movement noise.

[0015] The retractable key holder has a recessed pad, and a pressure sensor is located below the pad. A low-frequency antenna is located at the rear end of the retractable key holder. When a car key is placed on the retractable key holder, the pressure sensor detects its weight. Only when the preset weight is reached is it recognized as a car key. The low-frequency antenna receives the signal emitted by the key when it is placed on the holder. Only when both the low-frequency antenna and the pressure sensor are satisfied will the retractable key holder retract into the cavity when the vehicle is started.

[0016] An armrest box includes an armrest box body and a self-retractable vehicle key holder. The self-retractable vehicle key holder is housed within the armrest box body. The base plate of a fixed bracket is fixed to the bottom wall of the armrest box body. The front end of the armrest box body has an opening. The front end of the retractable key holder is matched and positioned at the opening. The retractable key holder can extend and retract back and forth at the opening. The key holder holds the key inside the armrest box, ensuring that the key will not fly out under force during bumpy roads or rapid acceleration and deceleration, thus meeting driving safety requirements.

[0017] The outer surface of the armrest box and the front surface of the retractable key holder are respectively decorated with textured decorative panels to enhance the interior's quality.

[0018] An automobile includes a body, a vehicle controller, and a center console, the center console being located inside the body, and the vehicle controller being electrically connected to a position switch, an adapter plate, a pressure sensor, and a low-frequency antenna.

[0019] Beneficial effects

[0020] This invention can electrically extend and retract, so that when extended, it meets the user's need for storing keys, and when retracted, it allows the user to make full use of the limited space inside the vehicle. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the support body in the extended state of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of the support body in the retracted state of the present invention.

[0023] Figure 3 This is a schematic diagram of the combined structure of the retractable key holder and the key holder telescopic transmission device of the present invention.

[0024] Figure 4 This is a schematic diagram of the retractable key holder extension transmission device of the present invention.

[0025] Figure 5 This is a partial structural diagram of the retractable key holder and the key holder telescopic transmission device of the present invention. Figure 1 .

[0026] Figure 6 This is a partial structural diagram of the retractable key holder and the key holder telescopic transmission device of the present invention. Figure 2 .

[0027] Figure 7 This is a schematic diagram of the cross-sectional structure of the support body of the present invention.

[0028] In the picture:

[0029] 1. Key holder telescopic transmission device; 1.1. Drive bracket; 1.1.1. First rotating support arm; 1.1.2. Second rotating support arm; 1.1.3. Support protrusion; 1.2. Gear bracket; 1.3. Worm gear; 1.4. Motor; 1.4.1. Motor bracket; 1.5. Worm wheel; 1.6. Vertical helical gear; 1.7. Horizontal helical gear; 1.8. First transmission shaft; 1.9. First transmission gear; 1.10. Second transmission gear; 1.11. Second transmission shaft; 1.11.1. Missing plane; 1.12. Limiting snap ring; 1.13. Limiting telescopic spring; 1.14. Clutch; 1.15. Position switch bracket; 1.16. Position switch; 1.17. Adapter plate;

[0030] 2. Retractable key holder; 2.1 Holder body; 2.2 Connecting plate; 2.3 Engaging rack; 2.4 Pad; 2.5 Pressure sensor; 2.6 Low-frequency antenna;

[0031] 3. Fixed bracket; 3.1. Base plate; 3.2. First slide rail; 3.2.1. First clamping buffer block; 3.3. Second slide rail; 3.3.1. Second clamping buffer block. Detailed Implementation

[0032] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0035] Example 1

[0036] See Figures 1-7 As shown, a self-retractable vehicle key holder includes a key holder telescopic transmission device 1, a retractable key holder 2, and a fixed bracket 3.

[0037] The key holder telescopic transmission device 1 is fixed to the upper surface of the fixed bracket 3;

[0038] The retractable key holder 2 is connected to the key holder telescopic transmission device 1.

[0039] The retractable key holder 2 can slide back and forth along the fixed bracket 3.

[0040] See Figures 3-6 As shown, the key holder telescopic transmission device 1 includes a drive bracket 1.1, a gear bracket 1.2, a worm gear 1.3, a motor 1.4, a worm wheel 1.5, a vertical helical gear 1.6, a horizontal helical gear 1.7, a first transmission shaft 1.8, and a first transmission gear 1.9;

[0041] The drive bracket 1.1 is fixed to the upper surface of the fixed bracket 3. The motor 1.4 is fixed to the middle of the upper surface of the drive bracket 1.1. One end of the worm 1.3 is fixed to the output shaft of the motor 1.4 and rotates synchronously. The other end of the worm 1.3 is rotatably connected to the gear bracket 1.2. The worm wheel 1.5 meshes with the worm 1.3. The vertical helical gear 1.6 is coaxially fixed to the upper part of the worm wheel 1.5. The upper end of the vertical helical gear 1.6 is rotatably connected to the gear bracket 1.2. The horizontal helical gear 1.7 meshes with the vertical helical gear 1.6. One end of the first transmission shaft 1.8 is coaxially fixed to the horizontal helical gear 1.7. The other end of the first transmission shaft 1.8 passes through the first rotating support arm 1.1.1 of the drive bracket 1.1 and is coaxially fixed to the first transmission gear 1.9. The first transmission gear 1.9 meshes with the retractable key holder 2 for transmission.

[0042] See Figures 3-4 As shown, the retractable key holder 2 includes a grooved holder body 2.1. The grooved holder body 2.1 has connecting plates 2.2 extending horizontally to the rear left and right sides. Each connecting plate 2.2 has a meshing rack 2.3 screwed onto its lower surface. One meshing rack 2.3 meshes with the first transmission gear 1.9, and the two meshing racks 2.3 have sliding connecting protrusions on their side ends. The sliding connecting protrusions on each side are slidably connected to the corresponding positions of the fixed bracket 3.

[0043] See Figures 3-6 As shown, the fixed bracket 3 includes a base plate 3.1, a first slide rail 3.2, and a second slide rail 3.3. The first slide rail 3.2 and the second slide rail 3.3 are symmetrically fixed on the left and right sides of the upper surface of the base plate 3.1, respectively. The corresponding side walls of the first slide rail 3.2 and the second slide rail 3.3 are respectively provided with sliding connection grooves. The sliding connection protrusions of the two meshing racks 2.3 are respectively housed in the sliding connection grooves and slide in cooperation with the sliding connection grooves. The drive bracket 1.1 is fixed to the front end of the upper surface of the base plate 3.1.

[0044] See Figures 5-6As shown, the key holder telescopic transmission device 1 also includes a second transmission gear 1.10, a second transmission shaft 1.11, a limiting snap ring 1.12, a limiting telescopic spring 1.13, and a clutch 1.14. The upper end of the second transmission shaft 1.11 is provided with a missing plane 1.11.1. One end of the second transmission shaft 1.11 passes through the second rotating support arm 1.1.2 of the drive bracket 1.1 and is coaxially fixed with the second transmission gear 1.10. The second transmission gear 1.10 meshes with another meshing rack 2.3. The clutch 1.14 is slidably sleeved on the other end of the second transmission shaft 1.11. One end of the clutch 1.14 is connected to the horizontal helical gear 1. 7. The clutch 1.14 is coaxial and has a limiting transmission contact. The other end of the clutch 1.14 is in contact with one end of the limiting extension spring 1.13. The limiting extension spring 1.13 is sleeved on the second transmission shaft 1.11, and the other end of the limiting extension spring 1.13 is in limiting contact with the limiting snap ring 1.12. The limiting snap ring 1.12 is sleeved and fixed on the second transmission shaft 1.11. The limiting extension spring makes the clutch and the horizontal helical gear make a limiting contact. The drive bracket 1.1 below the second transmission shaft 1.11 near the clutch 1.14 is provided with a support protrusion 1.1.3. The upper end of the support protrusion 1.1.3 is slidably connected to the second transmission shaft 1.11.

[0045] See Figures 5-6 As shown, the inner walls of the sliding connection grooves of the first slide rail 3.2 and the second slide rail 3.3 are respectively provided with a first clamping buffer block 3.2.1 and a second clamping buffer block 3.3.1. A position switch bracket 1.15 is fixed on the first rotating support arm 1.1.1. A position switch 1.16 is provided on the position switch bracket 1.15. The position switch 1.16 is adjacent to the side wall of the corresponding meshing rack 2.3. An adapter plate 1.17 is fixed on the drive bracket 1.1 next to the motor 1.4. The adapter plate 1.17 is electrically connected to the motor 1.4. The motor 1.4 is fixed to the middle of the upper surface of the drive bracket 1.1 through the motor bracket 1.4.1.

[0046] See Figure 7 As shown, a pad 2.4 is provided in the groove of the retractable key holder 2.1, a pressure sensor 2.5 is provided below the pad 2.4, and a low frequency antenna 2.6 is provided at the rear end of the retractable key holder 2.1.

[0047] Example 2

[0048] See Figures 1-4 As shown, an armrest box includes an armrest box body and a self-retractable car key holder. The self-retractable car key holder is housed in the armrest box body. The base plate 3.1 of the fixed bracket 3 is fixed to the bottom wall of the armrest box body. The front end face of the armrest box body has an opening. The front end face of the retractable key holder 2's support body 2.1 is matched and set at the opening, and the support body 2.1 of the retractable key holder 2 can extend and retract back and forth at the opening.

[0049] The outer surface of the armrest box and the front end surface of the retractable key holder 2.1 are respectively provided with decorative panels with textured patterns.

[0050] Example 3

[0051] An automobile includes a body, a vehicle controller, and a center console. The center console is located inside the body. The vehicle controller is electrically connected to a position switch 1.16, an adapter plate 1.17, a pressure sensor 2.5, and a low-frequency antenna 2.6.

[0052] Working principle

[0053] When extended, the retractable key holder 2 provides convenient storage for the key after the user enters the driver's cabin, and has a visually floating effect. The retractable key holder 2 can also hold the key and store it in the armrest box. The retractable key holder 2 keeps the key inside the armrest box, ensuring that the key will not fly out under force in the event of bumpy roads or rapid acceleration and deceleration, thus meeting the requirements of driving safety.

[0054] When the user opens the car door, the vehicle controller receives the signal and drives the motor 1.4 to operate. The output shaft of the motor 1.4 is fixed to the worm gear 1.3, and the worm gear 1.3 rotates synchronously, driving the worm wheel 1.5 to rotate. The vertical helical gear 1.6 is fixed coaxially with the worm wheel 1.5, and the worm wheel 1.5 drives the vertical helical gear 1.6 to rotate. The horizontal helical gear 1.7 meshes with the vertical helical gear 1.6 and rotates. The first transmission shaft 1.8 is fixed coaxially with the horizontal helical gear 1.7, and the first transmission gear 1.9 is fixed coaxially with the first transmission shaft 1.8. The first transmission gear 1.9 rotates synchronously with the motor 1.4, and the two meshing racks 2.3 move along the first slide rail 3.2 and the second slide rail 3.3 to extend the retractable key holder 2.

[0055] The user places the key in the retractable key holder 2. The pressure sensor 2.5 and the low-frequency antenna 2.6 accurately identify this action and send a signal to the vehicle controller. The key holder determines whether the object being supported is a key based on the identification by the pressure sensor 2.5 and the low-frequency antenna 2.6. Only after confirming that there is no problem can the subsequent actions be performed.

[0056] When the user drives the vehicle, the vehicle controller receives a signal and drives motor 1.4 to reverse. Through the above mechanism, the retractable key holder 2 is retracted.

[0057] The extension and retraction of the retractable key holder 2 will trigger the position switch 1.16. The position switch 1.16 triggers a feedback signal to the vehicle controller, which reduces the voltage of the motor 1.4. The retractable key holder 2 slows down and comes to a stop at the first clamping buffer block 3.2.1 and the second clamping buffer block 3.3.1, reducing movement noise. The clutch 1.14 ensures the stability of the mechanism when the retractable key holder 2 is extended, and prevents external force from pushing the retractable key holder 2 and damaging the transmission components of the key holder extension and retraction transmission device.

[0058] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A self-retractable vehicle key holder, characterized in that: Includes a key holder telescopic transmission device (1), a telescopic key holder (2), and a fixed bracket (3); The key holder telescopic transmission device (1) is fixed to the upper surface of the fixed bracket (3); The retractable key holder (2) is connected to the key holder telescopic transmission device (1) for transmission; The retractable key holder (2) can slide back and forth along the fixed bracket (3); The key holder telescopic transmission device (1) includes a drive bracket (1.1), a gear bracket (1.2), a worm (1.3), a motor (1.4), a worm wheel (1.5), a vertical helical gear (1.6), a horizontal helical gear (1.7), a first transmission shaft (1.8), and a first transmission gear (1.9). The drive bracket (1.1) is fixed to the upper surface of the fixed bracket (3), the motor (1.4) is fixed to the middle of the upper surface of the drive bracket (1.1), one end of the worm (1.3) is fixed to the output shaft of the motor (1.4) and rotates synchronously, the other end of the worm (1.3) is rotatably connected to the gear bracket (1.2), the worm wheel (1.5) meshes with the worm (1.3), and the vertical helical gear (1.6) is coaxially fixed to the upper part of the worm wheel (1.5). The upper end of the gear is rotatably connected to the gear bracket (1.2). The horizontal helical gear (1.7) meshes with the vertical helical gear (1.6). One end of the first drive shaft (1.8) is fixed coaxially with the horizontal helical gear (1.7). The other end of the first drive shaft (1.8) passes through the first rotating support arm (1.1.1) of the drive bracket (1.1) and is fixed coaxially with the first drive gear (1.9). The first drive gear (1.9) meshes with the retractable key holder (2) for transmission. The key holder telescopic transmission device (1) also includes a second transmission gear (1.10), a second transmission shaft (1.11), a limiting snap ring (1.12), a limiting telescopic spring (1.13), and a clutch (1.14). The upper end of the second transmission shaft (1.11) is provided with a missing plane (1.11.1). One end of the second transmission shaft (1.11) passes through the second rotating support arm (1.1.2) of the drive bracket (1.1) and is coaxially fixed with the second transmission gear (1.10). The second transmission gear (1.10) meshes with another meshing rack (2.3). The clutch (1.14) is slidably sleeved on the other end of the second transmission shaft (1.11). One end of the clutch (1.14) is connected to a horizontal helical gear (1.15). 1.7) Coaxial and limited transmission contact, the other end of the clutch (1.14) is in contact with one end of the limiting extension spring (1.13), the limiting extension spring (1.13) is sleeved on the second transmission shaft (1.11), and the other end of the limiting extension spring (1.13) is in limited contact with the limiting snap ring (1.12), the limiting snap ring (1.12) is sleeved and fixed on the second transmission shaft (1.11), the limiting extension spring makes the clutch and the horizontal helical gear limited contact; a support protrusion (1.1.3) is provided on the drive bracket (1.1) below the second transmission shaft (1.11) near the clutch (1.14), the upper end of the support protrusion (1.1.3) is slidably connected to the second transmission shaft (1.11).

2. The self-retractable vehicle key holder according to claim 1, characterized in that: The retractable key holder (2) includes a grooved holder (2.1). The grooved holder (2.1) has connecting plates (2.2) extending horizontally to the rear left and right sides. Each connecting plate (2.2) has a meshing rack (2.3) screwed onto its lower surface. One meshing rack (2.3) meshes with the first transmission gear (1.9). The two meshing racks (2.3) have sliding connecting protrusions on their sides. The sliding connecting protrusions on each side are slidably connected to the corresponding position of the fixed bracket (3).

3. The self-retractable vehicle key holder according to claim 2, characterized in that: The fixed bracket (3) includes a base plate (3.1), a first slide rail (3.2) and a second slide rail (3.3); the first slide rail (3.2) and the second slide rail (3.3) are respectively symmetrically fixed on the left and right sides of the upper surface of the base plate (3.1). The corresponding side walls of the first slide rail (3.2) and the second slide rail (3.3) are respectively provided with sliding connection grooves. The sliding connection protrusions of the two meshing racks (2.3) are respectively housed in the sliding connection grooves and slide in cooperation with the sliding connection grooves. The drive bracket (1.1) is fixed to the front end of the upper surface of the base plate (3.1).

4. The self-retractable vehicle key holder according to claim 1, characterized in that: The sliding connection grooves of the first slide rail (3.2) and the second slide rail (3.3) are respectively provided with a first clamping buffer block (3.2.1) and a second clamping buffer block (3.3.1). The first rotating support arm (1.1.1) is fixed with a position switch bracket (1.15). The position switch bracket (1.15) is provided with a position switch (1.16). The position switch (1.16) is adjacent to the side wall of the corresponding meshing rack (2.3). The drive bracket (1.1) next to the motor (1.4) is fixed with an adapter plate (1.17). The adapter plate (1.17) is electrically connected to the motor (1.4). The motor (1.4) is fixed to the middle of the upper surface of the drive bracket (1.1) through the motor bracket (1.4.1).

5. A self-retractable vehicle key holder according to claim 4, characterized in that: A pad (2.4) is provided in the groove of the body (2.1) of the retractable key holder (2), a pressure sensor (2.5) is provided below the pad (2.4), and a low frequency antenna (2.6) is provided at the rear end of the body (2.1) of the retractable key holder (2).

6. An armrest box, characterized in that: The armrest box includes a storage box body and a self-retractable vehicle key holder as described in any one of claims 1-5. The self-retractable vehicle key holder is housed in the armrest box body. The base plate (3.1) of the fixed bracket (3) is fixed to the bottom wall of the armrest box body. The front end face of the armrest box body is provided with an opening. The front end face of the retractable key holder (2) is matched and set at the opening. The retractable key holder (2) can extend and retract back and forth at the opening.

7. The armrest box according to claim 6, characterized in that: The outer surface of the armrest box and the front end of the support body (2.1) of the retractable key holder (2) are respectively provided with decorative panels with textured patterns.

8. A car, characterized in that: The system includes a vehicle body, a vehicle controller, and an armrest box as described in claim 7. The armrest box is located inside the vehicle body. The vehicle controller is electrically connected to a position switch (1.16), an adapter plate (1.17), a pressure sensor (2.5), and a low-frequency antenna (2.6).

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