Self-locking inclined roof vacuum handpiece holder

Abstract

The utility model relates to a kind of mobile phone support, specifically a self-locking type oblique roof vacuum mobile phone support, the mobile phone support includes suction disc main body, suction disc main body includes bottom disc and cover is set on the surface cover of bottom disc, unlocking block, locking block and oblique roof block are set between bottom disc and surface cover, wherein surface cover is contact connection with unlocking block, and surface cover includes main cover plate, limit strip is fixed in the lower end surface of main cover plate, unlocking block includes center body and arrowhead body fixed on center body, limit slot is formed in the upper end surface of center body, limit strip is slidably arranged in limit slot, and can linearly move in limit slot, upper positioning block and lower positioning block are fixed on the end of arrowhead body away from center body, upper positioning block is located in the position above lower positioning block, and spring limiting slot is formed between upper positioning block and lower positioning block. The self-locking type oblique roof vacuum mobile phone support, the operation of adsorption and un-adsorption is very simple and convenient, and use experience is improved.

Description

Technical Field

[0001] This utility model relates to a mobile phone holder, specifically a self-locking angled vacuum mobile phone holder. Background Technology

[0002] A phone stand is an auxiliary tool used to stably support a mobile phone. Its main function is to free up the hands, allowing users to use their phones more comfortably and safely in different scenarios.

[0003] Existing phone holders have a complex and poorly designed structure. To attach the phone to a flat surface, the user must forcefully squeeze the suction cups to expel air. Releasing the phone requires considerable manual force to pull the suction cups away from the surface, making the process inconvenient and providing a poor user experience. Furthermore, the screws on existing phone holders are exposed, which is unsightly. Therefore, the inventor has improved the structure of the phone holder. Utility Model Content

[0004] The purpose of this utility model is to provide a self-locking angled vacuum phone holder. This phone holder has a simple structure and reasonable design. By squeezing the two locking blocks, the base can automatically adhere to a smooth surface without the need to squeeze the suction cup. Unlocking can be easily completed by pushing the unlocking block, and there is no need to stretch the suction cup. The adsorption and desorption operations are very simple and convenient, improving the user experience. The rubber ring set on the main cover plate can cover multiple locking screws, making the overall phone holder more aesthetically pleasing. This solves the problems mentioned in the above-mentioned technical background.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-locking angled vacuum mobile phone holder, which includes a suction cup body, a base plate, and a cover plate on the base plate. The base plate is made of an elastic material; in this embodiment, the base plate is made of TPU material. An unlocking block, a locking block, and an angled block are provided between the base plate and the cover plate. The cover plate is in contact with the unlocking block and includes a main cover plate. A limiting strip is fixed to the lower end face of the main cover plate. The unlocking block includes a central body and an arrow body fixed to the central body. A limiting groove is formed on the upper end face of the central body. The limiting strip is slidably disposed within the limiting groove and can move linearly within the limiting groove. An upper positioning block and a lower positioning block are fixed at the end of the arrow body away from the central body. The upper positioning block is located above the lower positioning block, and a spring limiting groove is formed between the upper and lower positioning blocks. L-shaped binding grooves are provided at both ends of the central body. There are two locking blocks, symmetrically positioned below the unlocking block. Both locking blocks are slidably mounted on the chassis and can only move unidirectionally on the chassis. Each locking block includes an operating handle and two guide posts fixed to the upper surface of the operating handle. The guide posts pass through the binding groove from bottom to top and are positioned within the binding groove. A first inclined surface is provided at the end of the two operating handles that are close to each other. An inclined top block is located between the two locking blocks, and both ends of the inclined top block are in contact with the two locking blocks respectively. The inclined top block includes a support frame, and a second inclined surface is formed at both ends of the support frame. The two first inclined surfaces are respectively attached to the two second inclined surfaces. A positioning screw is provided through the inclined top block from top to bottom. The positioning screw is installed on the base and the inclined top block is fixed to the base by the positioning screw. The base is fixed at the center of the upper surface of the chassis. The suction cup body also includes a limiting spring, which is in contact with the inner wall of the spring limiting groove.

[0006] Preferably, a support arm is fixed to the upper surface of the main cover plate, and a recessed groove is provided on the side of the main cover plate away from the support arm. Multiple locking screws are installed through the recessed groove from top to bottom. All locking screws are installed on the chassis. A rubber ring is provided in the recessed groove to completely cover the multiple locking screws. The cover can be fixed to the chassis by the multiple locking screws. The rubber ring is used to cover the multiple locking screws, making the main cover plate more aesthetically pleasing.

[0007] Preferably, both the limiting strip and the limiting groove are in the shape of a straight line, and there are two of each.

[0008] Preferably, the limiting spring includes a central rod and restraining sleeves symmetrically arranged at both ends of the central rod. The end of the central rod near the arrow body is provided with an arc-shaped outer wall, so that the central rod can better contact the arrow body and allow the unlocking block to move.

[0009] Preferably, both restraint sleeves are C-shaped, and both restraint sleeves have grooves formed on their inner sides. Both grooves have fixing posts on their inner sides, and both fixing posts are fixed to the upper end face of the chassis. The two fixing posts are used to limit the two ends of the limiting spring, so that the central rod can push the arrow body.

[0010] Preferably, it also includes a support component, which includes a support rod and a mobile phone placement component. One end of the support rod is movably connected to the main cover plate via a support arm, and the other end is movably connected to the mobile phone placement component.

[0011] Preferably, the mobile phone placement component includes a support base movably connected to a support rod. A magnet mounting groove is formed on the edge of the support base along its circumferential direction. A pad is provided in the magnet mounting groove. A magnet is laid on top of the pad. A magnet cover is provided above the magnet. The magnet cover covers the magnet mounting groove and completely covers the magnet. The support base is solid or hollow.

[0012] Preferably, two spring mounting slots are symmetrically arranged on the upper end face of the support frame, and a return spring is installed in each of the two spring mounting slots. The ends of the two return springs away from the support frame are connected to the main cover plate. When the user squeezes the two operating handles and brings them closer together, the guide post on each operating handle moves from one corner position in the restraint groove to the center position in the restraint groove. At this time, the limit spring will automatically push the unlocking block to move, causing the unlocking block to move a small distance away from the limit spring, and causing the guide post on each operating handle to move to the other corner position in the restraint groove. At this time, the guide posts on the two operating handles cannot return to their original positions, so the two operating handles... When the handles are locked, and the two handles approach each other, the two first and two second inclined surfaces work together to simultaneously press the two ends of the inclined block. This causes the positioning screw to pull the base upward a short distance, thus lifting the center of the chassis and allowing it to automatically adhere to a smooth surface, such as glass. Subsequently, when the unlocking block is pressed towards the position of the limit spring, the guide post on each handle moves from the edge of the restraint groove to the center of the restraint groove. At this time, the support frame automatically presses the two handles, returning them to their original positions. The chassis then separates from the smooth surface, completing the unlocking process.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model provides a self-locking angled vacuum mobile phone holder, which includes a suction cup body. The overall structure is simple and reasonably designed. The suction cup body includes a base and a cover on the base. An unlocking block, a locking block, and an angled block are provided between the base and the cover. The unlocking block includes a central body and an arrow body fixed to the central body. An upper positioning block and a lower positioning block are fixed at the end of the arrow body away from the central body. A spring limiting groove is formed between the upper positioning block and the lower positioning block. L-shaped binding grooves are provided at both ends of the central body. There are two locking blocks. Each locking block includes an operating handle and two guide posts fixed to the upper end face of the operating handle. The guide posts pass through the binding groove from bottom to top and are set in the binding groove. A first inclined surface is provided at the end of the two operating handles that are close to each other. The angled block is positioned... Between the two locking blocks, and with both ends of the inclined top block in contact with the two locking blocks respectively, the inclined top block includes a support frame, with a second inclined surface formed at both ends of the support frame. The two first inclined surfaces are respectively attached to the two second inclined surfaces. A positioning screw is installed through the inclined top block from top to bottom, and the positioning screw is installed on the base. The suction cup body also includes a limiting spring, which is in contact with the inner wall of the spring limiting groove. When the user squeezes the two operating handles and brings them closer together, the two ends of the inclined top block are squeezed simultaneously by the cooperation of the two first inclined surfaces and the two second inclined surfaces. This causes the positioning screw to pull the base upward a short distance, thus lifting the center position of the chassis upward, so that the chassis automatically adheres to the smooth surface. This eliminates the trouble of manually pressing the suction cup for adsorption, improves the user experience, and is highly practical.

[0015] 2. When using this utility model, if unlocking is required, press the unlocking block toward the position of the limiting spring. The guide post on each operating handle moves from the edge of the binding groove to the center of the binding groove. At this time, the support frame will automatically press the two operating handles, causing the two operating handles to return to their original positions. The chassis separates from the smooth surface, and unlocking can be easily completed. The operation of adsorption and desorption of the entire mobile phone holder is very simple and convenient, so it is suitable for widespread use.

[0016] 3. In this utility model, a support arm is fixed to the upper end of the main cover plate, and a recessed groove is provided on the side of the main cover plate away from the support arm. Multiple locking screws are installed through the recessed groove from top to bottom. All locking screws are installed on the chassis. A rubber ring is provided in the recessed groove to completely cover the multiple locking screws. The cover can be fixed to the chassis by the multiple locking screws. The rubber ring is used to cover the multiple locking screws, making the entire mobile phone holder more aesthetically pleasing. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the chassis and cover of this utility model after separation;

[0019] Figure 3 This is an exploded view of the suction cup body of this utility model;

[0020] Figure 4 This is one of the schematic diagrams of the faceplate of this utility model;

[0021] Figure 5 This is the second schematic diagram of the face cover of this utility model;

[0022] Figure 6 This is a schematic diagram of the unlocking block of this utility model;

[0023] Figure 7 This is a schematic diagram of the locking block of this utility model;

[0024] Figure 8 This is one of the schematic diagrams of the inclined top block of this utility model;

[0025] Figure 9 This is a schematic diagram of the limiting spring of this utility model;

[0026] Figure 10 This is a schematic diagram of the support component of this utility model;

[0027] Figure 11 This is the second schematic diagram of the inclined top block of this utility model.

[0028] The reference numerals and names in the diagram are as follows: 1. Suction cup body; 11. Base; 12. Cover; 121. Main cover plate; 122. Limiting strip; 123. Support arm; 124. Recessed groove; 125. Locking screw; 126. Rubber ring; 13. Unlocking block; 131. Center body; 132. Arrow body; 133. Limiting groove; 134. Upper positioning block; 135. Lower positioning block; 136. Spring limiting groove; 137. Restraining groove; 14. Locking block; 141. Operating handle; 142. Guide post; 143. First inclined plane; 15. Inclined top block; 151. Support frame; 152. Second inclined plane; 153. Spring mounting slot; 154. Return spring; 16. Positioning screw; 17. Base; 18. Limiting spring; 181. Center rod; 182. Restraining sleeve; 183. Arc-shaped outer wall; 184. Column groove; 19. Fixing pile; 2. Support assembly; 21. Support rod; 22. Mobile phone placement assembly; 221. Support base; 222. Magnet mounting slot; 223. Pad; 224. Magnet; 225. Magnet cover plate. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0031] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0032] Example 1:

[0033] Please see Figure 1 The first embodiment provided by this utility model is a self-locking angled vacuum mobile phone holder, which includes a suction cup body 1 and a support component 2 disposed on the suction cup body 1.

[0034] Please see Figure 2The suction cup body 1 includes a base 11 and a cover 12 covering the base 11. The base 11 is made of an elastic material. In this embodiment, the base 11 is made of TPU material. An unlocking block 13, a locking block 14, and a slanted top block 15 are provided between the base 11 and the cover 12. The cover 12 is in contact with the unlocking block 13. There are two locking blocks 14, which are symmetrically arranged below the unlocking block 13. Both locking blocks 14 are slidably arranged on the base 11, and the locking blocks 14 can only move in one direction on the base 11. The slanted top block 15 is located between the two locking blocks 14, and both ends of the slanted top block 15 are in contact with the two locking blocks 14 respectively.

[0035] Please see Figure 3 A positioning screw 16 is provided through the inclined top block 15 from top to bottom. The positioning screw 16 is installed on the base 17. The inclined top block 15 is fixed to the base 17 by the positioning screw 16. The base 17 is fixed at the center of the upper end face of the chassis 11. The suction cup body 1 also includes a limiting spring 18.

[0036] Please see Figure 4 The cover 12 includes a main cover plate 121, and a limiting strip 122 is fixed on the lower end face of the main cover plate 121. The limiting strip 122 is in the shape of a straight line.

[0037] Please see Figure 5 A support arm 123 is fixed to the upper surface of the main cover plate 121, and a recessed groove 124 is provided on the side of the main cover plate 121 away from the support arm 123. Multiple locking screws 125 are installed through the recessed groove 124 from top to bottom. The multiple locking screws 125 are all installed on the chassis 11. A rubber ring 126 is provided in the recessed groove 124 to completely cover the multiple locking screws 125. The cover plate 12 can be fixed to the chassis 11 by the multiple locking screws 125. The rubber ring 126 is used to cover the multiple locking screws 125, making the main cover plate 121 more beautiful and the entire mobile phone holder more beautiful.

[0038] Please see Figure 6 The unlocking block 13 includes a central body 131 and an arrow body 132 fixed on the central body 131. A limiting groove 133 is formed on the upper end surface of the central body 131. A limiting strip 122 is slidably disposed in the limiting groove 133 and can move linearly within the limiting groove 133. An upper positioning block 134 and a lower positioning block 135 are fixed at the end of the arrow body 132 away from the central body 131. The upper positioning block 134 is located above the lower positioning block 135, and a spring limiting groove 136 is formed between the upper positioning block 134 and the lower positioning block 135. The limiting spring 18 is in contact with the inner wall of the spring limiting groove 136. An L-shaped binding groove 137 is provided at both ends of the central body 131. The limiting groove 133 is straight, and there are two limiting strips 122 and two limiting grooves 133.

[0039] Please see Figure 7 Each locking block 14 includes an operating handle 141 and two guide posts 142 fixed to the upper end face of the operating handle 141. The guide posts 142 pass through the binding groove 137 from bottom to top and are disposed in the binding groove 137. A first inclined surface 143 is provided at the end of the two operating handles 141 that are close to each other.

[0040] Please see Figure 8 The inclined block 15 includes a support frame 151, and a second inclined surface 152 is formed at both ends of the support frame 151. The two first inclined surfaces 143 are respectively attached to the two second inclined surfaces 152.

[0041] Please see Figure 9 The limiting spring 18 includes a central rod 181 and binding sleeves 182 symmetrically arranged at both ends of the central rod 181. The end of the central rod 181 near the arrow body 132 is provided with an arc-shaped outer wall 183, so that the central rod 181 can better contact the arrow body 132 and allow the unlocking block 13 to move. Both binding sleeves 182 are C-shaped, and both binding sleeves 182 have a column groove 184 formed on their inner side. Both column grooves 184 are provided with a fixing post 19 on their inner side. Both fixing posts 19 are fixed to the upper end face of the chassis 11. The two fixing posts 19 are used to limit the two ends of the limiting spring 18, so that the central rod 181 can push the arrow body 132.

[0042] Please see Figure 10 The support assembly 2 includes a support rod 21 and a mobile phone placement assembly 22. One end of the support rod 21 is movably connected to the main cover plate 121 via a support arm 123, and the other end is movably connected to the mobile phone placement assembly 22. The mobile phone placement assembly 22 includes a support base 221 movably connected to the support rod 21. A magnet mounting groove 222 is formed along the circumferential direction of the edge of the support base 221. A pad 223 is provided in the magnet mounting groove 222. A magnet 224 is laid on top of the pad 223. A magnet cover plate 225 is provided on top of the magnet 224. The magnet cover plate 225 covers the magnet mounting groove 222 and completely covers the magnet 224. The support base 221 is solid or hollow.

[0043] Please refer to it again. Figures 1 to 10In use, when the user squeezes the two operating handles 141 and brings them closer together, the guide post 142 on each operating handle 141 moves from one corner position in the restraint groove 137 to the center position in the restraint groove 137. At this time, the limiting spring 18 automatically pushes the unlocking block 13 to move, causing the unlocking block 13 to move a short distance away from the limiting spring 18, and causing the guide post 142 on each operating handle 141 to move to the other corner position in the restraint groove 137. At this time, the guide post 142 on the two operating handles 141 cannot return to its original position, so the two operating handles 141 are locked. When the two operating handles 141 are close to each other, they are secured by the two first inclined surfaces 143 and the two second inclined surfaces 144. With the cooperation of 52, both ends of the inclined top block 15 are simultaneously squeezed, and the support frame 151 moves upward a short distance, causing the positioning screw 16 to pull the base 17 upward a short distance as well. This lifts the center position of the chassis 11, allowing the chassis 11 to automatically adhere to a smooth surface, such as a glass surface. Subsequently, when the person presses the unlocking block 13 toward the position of the limit spring 18, the guide post 142 on each operating handle 141 moves from the edge of the restraint groove 137 to the center position of the restraint groove 137. At this time, the support frame 151 will automatically squeeze the two operating handles 141, causing the two operating handles 141 to return to their original positions, and the base 17 to return to its original position, allowing the chassis 11 to separate from the smooth surface, thus completing the unlocking.

[0044] Example 2:

[0045] Please see Figure 11 This embodiment is basically the same as the structure of Embodiment 1, except that: two spring mounting slots 153 are symmetrically arranged on the upper end face of the support frame 151, and a return spring 154 is installed in each of the two spring mounting slots 153. The ends of the two return springs 154 away from the support frame 151 are connected to the main cover plate 121. During adsorption, both ends of the support frame 151 are subjected to pressure, causing the support frame 151 to move upward a small distance, and the two return springs 154 will be compressed. During unlocking, the two return springs 154 will pop downward a certain distance under the action of the main cover plate 121, and generate a downward thrust on the support frame 151, so that the base 17 can return to its original position more smoothly and quickly to complete the unlocking. Other parts not described in this embodiment are the same as in Embodiment 1, and will not be repeated here.

[0046] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A self-locking angled vacuum mobile phone holder, characterized in that: The device includes a suction cup body (1), which includes a base (11) and a cover (12) on the base (11). An unlocking block (13), a locking block (14), and a slanted top block (15) are provided between the base (11) and the cover (12). The cover (12) is in contact with the unlocking block (13), and the cover (12) includes a main cover plate (121). A limit strip (122) is fixed to the lower end of the main cover plate (121). The unlocking block (13) includes a central body (131) and an arrow body (132) fixed to the central body (131). The upper end of the central body (131)... A limiting groove (133) is formed on the surface. The limiting strip (122) is slidably disposed in the limiting groove (133) and can move linearly within the limiting groove (133). An upper positioning block (134) and a lower positioning block (135) are fixed at one end of the arrow body (132) away from the central body (131). The upper positioning block (134) is located above the lower positioning block (135), and a spring limiting groove (136) is formed between the upper positioning block (134) and the lower positioning block (135). Both ends of the central body (131) are provided with L-shaped binding grooves (137). Two locking blocks (14) are provided. Two locking blocks (14) are symmetrically arranged below the unlocking block (13). Both locking blocks (14) are slidably mounted on the chassis (11). Each locking block (14) includes an operating handle (141) and two guide posts (142) fixed to the upper surface of the operating handle (141). The guide posts (142) pass through the binding groove (137) from bottom to top and are located in the binding groove (137). The two operating handles (141) are provided with a first inclined surface (143) at their respective ends. The inclined top block (15) is located between the two locking blocks (14), and the two ends of the inclined top block (15) are respectively connected to the two locks. The fixed block (14) is in contact with the inclined top block (15), which includes a support frame (151). Both ends of the support frame (151) are formed with second inclined surfaces (152). The two first inclined surfaces (143) are respectively attached to the two second inclined surfaces (152). The inclined top block (15) is provided with a positioning screw (16) running from top to bottom. The positioning screw (16) is installed on the base (17). The base (17) is fixed at the center of the upper end face of the chassis (11). The suction cup body (1) also includes a limiting spring (18). The limiting spring (18) is in contact with the inner wall of the spring limiting groove (136).

2. The self-locking angled vacuum mobile phone holder according to claim 1, characterized in that: A support arm (123) is fixed to the upper end face of the main cover plate (121), and a recessed groove (124) is provided on the side of the main cover plate (121) away from the support arm (123). Multiple locking screws (125) are provided through the recessed groove (124) from top to bottom. The multiple locking screws (125) are all installed on the chassis (11). A rubber ring (126) is provided in the recessed groove (124) and completely covers the multiple locking screws (125).

3. A self-locking bevel tip vacuum cell phone stand according to claim 1, wherein: The limiting strip (122) and the limiting groove (133) are both in the shape of a straight line, and there are two of each limiting strip (122) and limiting groove (133).

4. The self-locking bevel tip vacuum cell phone stand of claim 1, wherein: The limiting spring (18) includes a central rod (181) and binding sleeves (182) symmetrically arranged at both ends of the central rod (181). The central rod (181) has an arc-shaped outer wall (183) at one end near the arrow body (132).

5. A self-locking bevel tip vacuum cell phone stand according to claim 4, wherein: Both of the binding sleeves (182) are C-shaped, and both binding sleeves (182) have column grooves (184) formed on their inner sides. Both column grooves (184) are provided with fixing piles (19) on their inner sides. Both fixing piles (19) are fixed to the upper end face of the chassis (11).

6. A self-locking bevel tip vacuum cell phone stand according to claim 1, wherein: It also includes a support assembly (2), which includes a support rod (21) and a mobile phone placement assembly (22). One end of the support rod (21) is movably connected to the main cover plate (121) via a support arm (123), and the other end is movably connected to the mobile phone placement assembly (22).

7. A self-locking bevel tip vacuum cell phone stand according to claim 6, wherein: The mobile phone placement component (22) includes a support base (221) movably connected to the support rod (21). A magnet mounting groove (222) is opened along the circumferential direction of the edge of the support base (221). A pad (223) is provided in the magnet mounting groove (222). A magnet (224) is laid on the pad (223). A magnet cover plate (225) is provided on the magnet (224). The magnet cover plate (225) covers the magnet mounting groove (222) and completely covers the magnet (224). The support base (221) is solid or hollow.

8. The self-locking bevel tip vacuum cell phone stand of claim 1, wherein: The upper end face of the support frame (151) is symmetrically provided with two spring mounting slots (153), and each of the two spring mounting slots (153) is equipped with a return spring (154). The end of each of the two return springs (154) away from the support frame (151) is connected to the main cover plate (121).

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