Elastic sheet type clamping structure and HUD (Head Up Display) comprising same

Abstract

The utility model discloses a shrapnel type clamping structure and an HUD head-up display comprising the same, the shrapnel type clamping structure comprises a slide block and a U-shaped shrapnel with two arm parts, the slide block is provided with an accommodating cavity for installing a curved mirror and a slot for one arm part of the U-shaped shrapnel to insert; and the other arm part of the U-shaped elastic sheet extends into the accommodating cavity and is elastically propped against the curved mirror. According to the utility model, the traditional clamping mode of a pressure spring and a stop block is canceled, the structure of the U-shaped elastic sheet is directly adopted for clamping, the elastic force of the U-shaped elastic sheet is directly applied to the curved mirror, and the force is not required to be transmitted through the stop block. When the elastic forces of the U-shaped elastic sheets are inconsistent and the sizes of the connecting and matching parts of the curved mirror are inconsistent, the U-shaped elastic sheets and the curved mirror are in point or line contact, so that the abrasion degree is greatly reduced, the requirement on the matching precision of a matching part is also greatly reduced, and in addition, the cost is reduced due to the fact that one part is reduced.

Description

Technical Field

[0001] The utility model relates to the field of automobile HUD, in particular to a spring-type clamping structure and a HUD head-up display comprising the same. Background Art

[0002] In automotive HUD (head-up display), the adjustment of image angle is mainly achieved by flipping the curved mirror. The accuracy of the flipping angle directly affects the position of the projected image. The operating accuracy of the motor that drives the curved mirror flipping directly affects the final imaging effect. In addition to the operating accuracy of the motor itself, the reliability of the connection between the curved mirror and the motor is also a key point.

[0003] The main connection method between the motor and the curved mirror is generally a structure with two compression springs and a stopper. The curved mirror is equipped with two legs that extend into the motor. The stopper is mounted on the electrode screw and contacts the compression springs on both sides. The elastic force of the compression springs clamps the legs of the curved mirror through the stopper to ensure the stability of the curved mirror. However, since this structure involves two components: the compression spring and the stopper, the parts need to be well matched. Therefore, the elastic force of the compression spring and the flatness of the stopper are very high, as well as the requirements for the connection and mating parts of the curved mirror. In addition, when the elastic force of one side of the compression spring is insufficient, the stopper will tilt, resulting in a loose connection and affecting operation. When the stopper tilts, it deviates from its original parallel position with the slider and can become stuck in the slider, causing the motor to operate poorly. When the slider tilts, the contact force between the stopper and the object is greater at one end, while the contact force between the other end and the object is less. The stopper with greater contact force on the side with greater contact force is more susceptible to wear, which not only shortens the stopper's service life, but also affects the adjustment accuracy of the curved mirror, ultimately reducing the service life of the motor. Utility Model Content

[0004] In order to solve the technical problems in the prior art that the connection between the motor and the curved mirror has high requirements for component fit and large component wear, the utility model provides a spring-type clamping structure and a HUD head-up display containing the same to solve the above problems.

[0005] The utility model proposes a spring-type clamping structure, including a slider and a U-shaped spring with two arms. The slider has a receiving cavity for installing a curved mirror and a slot for inserting one of the arms of the U-shaped spring. The other arm of the U-shaped spring extends into the receiving cavity and elastically abuts against the curved mirror.

[0006] Furthermore, the arm portion of the U-shaped spring piece inserted into the slot is provided with a mounting portion protruding outward and cooperating with the inner surface of the slot.

[0007] Furthermore, the arm portion of the U-shaped spring piece inserted into the slot has a bayonet, and the slot has a first protrusion inserted into the bayonet.

[0008] Furthermore, the slot is divided into a pre-installed section, a clamping section and a fitting section with decreasing widths along the insertion direction of the U-shaped spring piece. The clamping section has an interference fit with the mounting portion, the pre-installed section has a clearance fit with the U-shaped spring piece, and the first protrusion is located in the fitting section.

[0009] Furthermore, the first protrusion has a chamfer on one side facing the insertion direction of the U-shaped spring piece.

[0010] Furthermore, the width of the mounting portion is greater than the width of the arm portion where the mounting portion is located.

[0011] Furthermore, the mounting portion includes two C-shaped hooks symmetrically arranged on both sides of the arm of the U-shaped spring piece, and the maximum distance between the two C-shaped hooks is greater than the width of the arm where the two C-shaped hooks are located.

[0012] Furthermore, the surface in the accommodating cavity that contacts the U-shaped elastic piece has a second protrusion that supports the arm of the U-shaped elastic piece.

[0013] Furthermore, the two arms of the U-shaped spring are opened at a certain angle in a free state.

[0014] Furthermore, the opening angle a of the two arms of the U-shaped spring piece in a free state is 2° to 3°.

[0015] The present utility model also proposes a HUD head-up display, including a drive motor, a bracket, a curved mirror and the above-mentioned spring-type clamping structure, wherein the screw of the drive motor is rotatably connected to the bracket, the slider in the spring-type clamping structure is slidably matched with the screw, and the curved mirror is squeezed into the accommodating cavity by the U-shaped spring.

[0016] The beneficial effects of the utility model are:

[0017] (1) The present invention eliminates the traditional clamping method of using a compression spring block and directly adopts a U-shaped spring structure for clamping. The elastic force of the U-shaped spring is directly applied to the support leg of the curved mirror, and there is no need to transmit force through the block. When the elastic force of the U-shaped spring is inconsistent and the dimensions of the connection of the support leg of the curved mirror are inconsistent, the wear degree will be greatly reduced because the U-shaped spring and the curved mirror are in point or line contact, and the requirements for the matching accuracy of the matching parts are also greatly reduced. In addition, since one component is reduced, the cost will be reduced.

[0018] (2) The present invention realizes the positioning and fixation of the U-shaped spring piece and the slider by cooperating with the internal structure of the slide groove and the U-shaped spring piece, thereby ensuring the stable installation of the U-shaped spring piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1This is a front view of a specific embodiment of the HUD head-up display of the utility model;

[0021] Figure 2 This is an axial cross-sectional view of a specific embodiment of the HUD head-up display of the present invention;

[0022] Figure 3 This is a front view of the U-shaped spring piece in the spring piece type clamping structure described in the present invention;

[0023] Figure 4 It is a side view of the U-shaped spring in the utility model;

[0024] Figure 5 It is a top view of the U-shaped spring in the utility model;

[0025] Figure 6 This is the main view of the slider in the utility model;

[0026] Figure 7 yes Figure 6 BB cross-sectional view;

[0027] Figure 8 yes Figure 6 AA sectional view (the direction indicated by the arrow is the insertion direction of the U-shaped spring);

[0028] Figure 9 This is a schematic diagram of the U-shaped shrapnel preparation installation stage;

[0029] Figure 10 This is a schematic diagram of the U-shaped shrapnel after pre-installation;

[0030] Figure 11 This is a schematic diagram of the U-shaped shrapnel after it is fully installed;

[0031] Figure 12 This is the main view after the U-shaped spring and the slider are assembled;

[0032] Figure 13 yes Figure 12 CC sectional view;

[0033] Figure 14 yes Figure 12 DD section view.

[0034] In the figure, 1. slider, 101. accommodating cavity, 102. slot, 1021. pre-installed section, 1022. pressing section, 1023. mating section, 2. U-shaped spring clip, 201. first arm, 202. second arm, 203. mounting portion, 2031. C-shaped hook, 204. bayonet, 3. curved mirror, 4. first protrusion, 5. second protrusion, 6. driving motor, 601. screw, 602. stator assembly, 603. rotor assembly, 604. nut, 7. bracket. DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] For the convenience of description, the present invention simply describes the support leg of the curved mirror as a curved mirror, and the curved mirror 3 marked in the accompanying drawings is actually the support leg of the curved mirror.

[0037] Example 1

[0038] like Figure 2-Figure 12 As shown, a spring-type clamping structure includes a slider 1 and a U-shaped spring clip 2 with two arms. The slider 1 has a receiving cavity 101 for mounting a curved mirror 3 and a slot 102 for inserting one arm of the U-shaped spring clip 2. The other arm of the U-shaped spring clip 2 extends into the receiving cavity 101 and elastically abuts against the curved mirror 3. Slot 102 is used to secure the U-shaped spring clip 2 to the slider 1. The two arms of the U-shaped spring clip 2 are elastic. When one arm is fixed, the other arm is free and can elastically abut against the curved mirror 3, squeezing the curved mirror 3 between the arm and the inner wall of the receiving cavity 101.

[0039] Compared with the traditional structure, the utility model relies on the elastic force of the U-shaped spring piece 2 itself to directly apply it to the curved mirror 3, and there is no need to transmit force through a block, which reduces one part and thus saves costs. In addition, when the elastic forces of the two U-shaped spring pieces 2 are inconsistent or the dimensions of the connection parts of the curved mirror 3 are inconsistent, since the U-shaped spring piece 2 and the curved mirror 3 are in point or line contact, the degree of wear will be greatly reduced, and the requirements for the matching accuracy of the matching parts will also be greatly reduced.

[0040] For the convenience of description, the present invention names the arm portion inserted into the slot 102 as the first arm portion 201 , and the arm portion abutting against the curved mirror 3 as the second arm portion 202 .

[0041] The slot 102 and the first arm 201 can be fixed or tightly fitted to achieve the connection between the U-shaped spring 2 and the slider 1. If a fixed connection is used, the first arm 201 can be fixed by clamping or other fixing structures. This embodiment adopts a detachable connection structure.

[0042] The arm of the U-shaped spring 2 is usually a thin sheet structure, and it is difficult to directly use a movable structure to fix it on the arm. Therefore, in this embodiment, a mounting portion 203 is provided on the arm inserted into the slot 102 to protrude outwards and cooperate with the inner surface of the slot 102. Figure 3 As shown, the mounting portion 203 is arranged on the outer side of the first arm 201, that is, the side facing away from the second arm 202. The structure of the mounting portion 203 can be set according to the internal shape of the slot 102. After the two are assembled, the first arm 201 can be stably placed in the slot 102.

[0043] In this embodiment, the internal cross-section of the slot 102 is rectangular, and the mounting portion 203 is against the four side walls of the slot 102. In order to increase the contact area between the mounting portion 203 and the slot 102, it is preferred that the width of the mounting portion 203 is greater than the width of the arm where it is located. Figure 4 The left-right dimensions of the middle mounting portion 203 and the first arm portion 201, or Figure 5 The vertical dimensions of the middle mounting portion 203 and the first arm portion 201.

[0044] The installation part 203 can be specifically but not limited to: Figure 4 and Figure 5 As shown, it includes two C-shaped hooks 2031 symmetrically arranged on both sides of the arm of the U-shaped spring piece 2, and the maximum distance between the two C-shaped hooks 2031 is greater than the width of the arm where they are located. The maximum distance between the two C-shaped hooks 2031 is the width of the mounting portion 203. Each C-shaped hook 2031 abuts against the three side walls of the inner wall of the slot 102 and is located on both sides of the slot 102. The mounting portion 203 composed of the two C-shaped hooks 2031 is approximately U-shaped. When the spring piece is installed, the C-shaped hooks 2031 on both sides are inserted along the two sides of the slot (as shown in FIG. Figure 10 and Figure 12 As shown), this can increase the contact area with the slot 102 and ensure a certain pull-off force. At the same time, the mounting portion 203 is set to be U-shaped instead of L-shaped. The reason is that Figure 13As shown, after the mounting portion 203 reaches the installation position, it forms an interference fit with the slot 102. As the machine presses the arm into the slot 102, the C-shaped hooks 2031 on both sides deform and tilt inward, which reduces the contact area between the C-shaped hooks 2031 and the slot 102, affecting the installation stability of the U-shaped spring clip 2. The U-shaped structure of the mounting portion 203 ensures that even if the mounting portion 203 deforms inward, the mounting portion 203 can still contact the bottom surface of the slot 102, ensuring its pull-out strength.

[0045] Example 2

[0046] On the basis of the first embodiment, in order to further fix the U-shaped spring piece 2, as shown in FIG. Figure 7 、 Figure 8 、 Figure 13 and Figure 14 As shown, the arm of the U-shaped spring clip 2 that inserts into the slot 102 has a latch 204, and the slot 102 has a first protrusion 4 that inserts into the latch 204. When the mounting portion 203 is inserted to a certain depth, the latch 204 engages with the first protrusion 4, further ensuring the stability of the U-shaped spring clip 2. This prevents the U-shaped spring clip 2 from becoming loose when subjected to vibration and shock from the motor. To reduce installation resistance, a chamfer is preferably provided on the side of the first protrusion 4 that faces the insertion direction of the U-shaped spring clip 2, allowing the first arm 201 to slide along the chamfer.

[0047] The slot 102 can be set according to the shape of the U-shaped spring piece 2. In this embodiment, Figure 5 As shown, the mounting portion 203 is arranged near the bending portion of the U-shaped spring piece 2, and the bayonet 204 is arranged near the end of the first arm 201, that is, when the first arm 201 is inserted into the slot 102, the bayonet 204 enters the slot 102 first, and the mounting portion 203 enters the slot 102 later. Figure 7 As shown, the slot 102 is divided into a pre-installed section 1021, a clamping section 1022 and a matching section 1023 with decreasing widths along the insertion direction of the U-shaped spring piece 2. The clamping section 1022 is interference fit with the mounting portion 203, the pre-installed section 1021 is clearance fit with the U-shaped spring piece 2, and the first protrusion 4 is located in the matching section 1023.

[0048] The width of the pre-installed section 1021 is greater than the maximum width of the U-shaped spring piece 2 (including the mounting portion 203), and is used to guide the first arm portion 201 and the mounting portion 203 into the slot 102. Figure 9 As shown, the U-shaped spring piece 2 is sent to the front of the slider 1, and the first arm 201 is facing the slot 102. Then the worker pre-inserts the end of the first arm 201 into the slot 102 (as shown in FIG. Figure 10 As shown), the first arm portion 201 and the mounting portion 203 are then pressed integrally into the slot 102 by the tooling (as shown Figure 11As shown), if there is no preliminary guide of the pre-installed section 1021, then if the worker installs the U-shaped spring piece 2 crookedly, the process of pressing the tool into the tool may damage the U-shaped spring piece 2 or the slider 1.

[0049] The width of the clamping section 1022 is greater than the width of the fitting section 1023, that is, the fitting section 1023 is retracted relative to the clamping section 1022. When the mounting portion 203 is pressed in, it can rest against the step between the clamping section 1022 and the fitting section 1023 to limit the insertion depth of the first arm portion 201.

[0050] Example 3

[0051] On the basis of the above embodiment, the surface in the accommodating cavity 101 that contacts the U-shaped elastic piece 2 has a second protrusion 5 that supports the arm of the U-shaped elastic piece 2. Figure 8 and Figure 14 As shown, the second protrusion 5 is located on the lower surface of the accommodating cavity 101 and is used to support the second arm 202. The second protrusion 5 limits the compression range of the second arm 202. When the elastic force is abnormal and becomes weak, the second protrusion 5 can support the second arm 202, preventing the connection from becoming loose during use. The height of the second protrusion 5 is simulated and calculated based on the degree of clamping tightness.

[0052] Example 4

[0053] Based on the above embodiment, the two arms of the U-shaped spring 2 are open at a certain angle in the free state, ensuring that when the client is loaded, the U-shaped spring 2 is squeezed and the elastic force is released, so that the connection between the curved mirror 3 and the slider 1 is tighter.

[0054] As a preferred Figure 3 As shown, the two arms of the U-shaped spring clip 2 open at an angle a of 2° to 3° in their free state. Even in the extreme state, when the client bracket 7 is relatively small (the slider 1 is mounted on the bracket 7; a smaller bracket 7 also means a smaller slider 1, reducing the elastic deformation space for the U-shaped spring clip 2), sufficient compressive force can be provided. Even when the size of the docking plug of the client curved mirror 3 fluctuates, the U-shaped spring clip 2 can adjust itself without any gap fit.

[0055] Example 5

[0056] A head-up display (HUD) includes a drive motor 6, a bracket 7, a curved mirror 3, and the above-described spring-type clamping structure. The screw 601 of the drive motor 6 is rotationally connected to the bracket 7. The slider 1 in the spring-type clamping structure slides with the screw 601. The two curved mirrors 3 are squeezed into the accommodating cavity 101 by the U-shaped spring 2.

[0057] like Figure 1 and Figure 2 As shown, the drive motor 6 includes a stator assembly 602, a rotor assembly 603, a screw 601 and a nut 604. The stator assembly 602 is located at one end of the screw 601 and is fixed to the bracket 7. The rotor assembly 603 is located inside the stator assembly 602. The rotor assembly 603 drives the screw 601 to rotate. The screw 601 converts the rotational motion of the rotor assembly 603 into the linear motion of the slider 1 through the nut 604 installed on the slider 1.

[0058] In the present invention, the elastic force of the U-shaped spring piece 2 can be directly applied to the working curved mirror 3 without the need for intermediate transmission. Since the U-shaped spring piece 2 and the curved mirror 3 are in an interference fit connection state, when the elastic force of the two U-shaped spring pieces 2 is uneven, the U-shaped spring piece 2 can adjust the compression range according to the working object, and even if the elastic force on one side is insufficient, only clamping a support leg on the other side is sufficient to fix the curved mirror, and the slider 1 can drive the curved mirror to operate normally.

[0059] In the description of the present invention, it should be understood that the terms "width", "up", "down", "left", "right", "inside", "outside", "axial", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0060] Furthermore, the terms “first,” “second,” etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0061] In this specification, the schematic representations of the terms do not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments.

[0062] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A spring-type clamping structure, characterized in that: The invention comprises a slider (1) and a U-shaped spring piece (2) having two arms, wherein the slider (1) has a receiving cavity (101) for mounting a curved mirror (3) and a slot (102) for inserting one of the arms of the U-shaped spring piece (2), and the other arm of the U-shaped spring piece (2) extends into the receiving cavity (101) and elastically abuts against the curved mirror (3).

2. The spring-type clamping structure according to claim 1, characterized in that: The arm portion of the U-shaped spring piece (2) inserted into the slot (102) is provided with a mounting portion (203) protruding outwards and cooperating with the inner surface of the slot (102).

3. The spring-type clamping structure according to claim 2, characterized in that: The arm portion of the U-shaped spring piece (2) inserted into the slot (102) is provided with a bayonet (204), and the slot (102) is provided with a first protrusion (4) inserted into the bayonet (204).

4. The spring-type clamping structure according to claim 3, characterized in that: The slot (102) is divided into a pre-installed section (1021), a pressing section (1022) and a fitting section (1023) with decreasing widths along the insertion direction of the U-shaped spring piece (2); the pressing section (1022) is interference-fitted with the mounting portion (203); the pre-installed section (1021) is clearance-fitted with the U-shaped spring piece (2); and the first protrusion (4) is located in the fitting section (1023).

5. The spring-type clamping structure according to claim 3, characterized in that: The first protrusion (4) has a chamfer on one side facing the insertion direction of the U-shaped elastic piece (2).

6. The spring-type clamping structure according to claim 4, characterized in that: The width of the mounting portion (203) is greater than the width of the arm portion where it is located.

7. The spring-type clamping structure according to claim 6, characterized in that: The mounting portion (203) comprises two C-shaped hooks (2031) symmetrically arranged on both sides of the arm of the U-shaped spring piece (2), and the maximum distance between the two C-shaped hooks (2031) is greater than the width of the arm where they are located.

8. The spring-type clamping structure according to claim 1, characterized in that: The surface in the accommodating cavity (101) that contacts the U-shaped spring piece (2) has a second protrusion (5) that supports the arm of the U-shaped spring piece (2).

9. The spring-type clamping structure according to claim 1, characterized in that: The two arms of the U-shaped spring piece (2) are opened at a certain angle in a free state.

10. The spring-type clamping structure according to claim 1, characterized in that: The opening angle a of the two arms of the U-shaped spring piece (2) in a free state is 2° to 3°.

11. A head-up display (HUD), characterized by: The invention comprises a driving motor (6), a bracket, a curved mirror (3), and a spring-type clamping structure according to any one of claims 1 to 10, wherein the screw (601) of the driving motor (6) is rotatably connected to the bracket, the slider (1) in the spring-type clamping structure is slidably matched with the screw (601), and the curved mirror (3) is squeezed into the accommodating cavity (101) by the U-shaped spring (2).

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