A multi-position LED surface light source adjustment mechanism

Abstract

This invention belongs to the field of LED surface light source technology and discloses a multi-position LED surface light source adjustment mechanism, including an LED surface light source body. The LED surface light source body is provided with a light source adjustment part, which includes two baffles. The two baffles can focus the light from both sides of the LED surface light source body. By moving two toothed plates along mutually opposite paths, the angle of the baffles can be changed. During the passive angle change of the baffles, different tilt positions can be generated according to the required angle determined by the operator, thereby adjusting the emitted light source to different degrees. When the baffles are passively stretched and moved, they will be guided and limited to translation within a rectangular groove by sliders installed at the upper and lower ends. This achieves multi-position brightness adjustment of the LED surface light source body and improves the flexible use of the LED surface light source body.

Description

Technical Field

[0001] This invention belongs to the field of LED surface light source technology, specifically a multi-position LED surface light source adjustment mechanism. Background Technology

[0002] LED surface light sources consist of a metal frame and LED light strips arranged around the perimeter of the frame. These LED light strips are composed of LED circuit boards that are approximately the same length as the sides of the frame, and multiple LED beads set on the circuit boards. Long slots corresponding to the length of each circuit board are opened on the inner side of each side of the frame, and the LED light strips are set in these long slots. The light from LED surface light sources is softer and less glaring than that from point light sources, making it more suitable for long-term use. It also has energy-saving characteristics. The surface light source design further improves energy efficiency and is more energy-saving than traditional light sources. The light emitted by LED surface light sources is closer to natural light, making the lighting environment more comfortable.

[0003] Currently, in the use of LED surface light sources, some LED surface light source boards are equipped with lampshades to block the light emitted by the LED surface light source and produce a localized focusing effect. However, the lampshades in the existing technology need to be manually adjusted, and the existing LED surface light sources generally do not have the function of adjusting the local light source blocking of their light surface, thus reducing the flexibility of LED surface light sources. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides a mechanism for adjusting multi-position LED surface light sources.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-position LED surface light source adjustment mechanism, comprising an LED surface light source body, wherein the LED surface light source body is provided with a light source adjustment part, the light source adjustment part including two shielding plates, the two shielding plates can focus the light from both sides of the LED surface light source body, a shaft frame is fixedly connected through one side plate of each shielding plate, and a top rod is fixedly connected to one end side wall of each of the two shielding plates, a rotation and translation structure is provided on one end outer wall of the LED surface light source body, for driving the shielding plates to tilt and move to focus and block light, and two meshing downward moving structures are provided above the rotation and translation structure, for wiping the other end of the LED surface light source body.

[0006] Preferably, the rotation and translation structure includes a U-shaped plate fixedly connected to the outer wall of one end of the LED surface light source body. A forward and reverse rotating motor is fixedly connected to one side of the outer wall of the U-shaped plate. Two gear rods are movably sleeved through one side of the inner wall of the U-shaped plate, and one end of one gear rod is fixedly connected to the rotating shaft of the motor.

[0007] Preferably, each gear rod has a toothed plate meshing with its side wall. A hemp rope is fixedly connected to the outer wall of the gear rod, and the other end of the hemp rope is fixedly connected to one side of the shaft frame. Two limiting discs are also fixedly connected to the shaft frame. A torsion spring is fixedly connected to the top outer wall of the upper limiting disc, and a bent fixed rod is fixedly connected to the top of the torsion spring. The top of the shaft frame and the bottom inner wall of the bent fixed rod are movably connected.

[0008] Preferably, a U-shaped groove plate is fixedly connected to the outer wall of the other end of the LED surface light source body, a rectangular sliding groove is provided in the inner wall of the U-shaped groove plate, and a shielding baffle is slidably connected to the inner wall of the U-shaped groove plate.

[0009] Preferably, multiple sliders are fixedly connected to the outer walls of both the upper and lower ends of the overlapping baffle, and the outer walls of both sets of sliders are in close contact with the rectangular sliding groove. Furthermore, one end of the outer wall of the overlapping baffle is fixedly connected to one end of the inner wall of the U-shaped groove plate, and a magnetic plate is fixedly connected to both sides of the outer wall of the U-shaped groove plate and to the inner walls of both ends.

[0010] Preferably, a railing is fixedly connected to the outer wall of the other end of the overlapping baffle, and a telescopic elastic member is fixedly connected to the outer wall of one end of the railing. The telescopic elastic member and the top rod can be intermittently fitted together.

[0011] Preferably, each of the two meshing downward structures includes an L-shaped support plate fixedly connected to the top side wall of the toothed plate. A second toothed plate is fixedly connected to the top of the L-shaped support plate. The second toothed plate is specifically composed of two U-shaped smooth plates and two transverse toothed plates. A spur gear can be intermittently meshed with one end of each of the two transverse toothed plates.

[0012] Preferably, a screw is fixedly connected to the spur gear, and a sleeve is movably sleeved on the spur gear. The inner wall of the sleeve is movably sleeved with a section of the screw. The lower section of the screw is specifically a telescopic rod. An L-shaped long plate is threadedly connected to the upper half of the screw. One end of the sleeve is specifically fixedly connected to the top side wall of the U-shaped groove plate.

[0013] Preferably, an ear plate is rotatably connected to the rod body of the screw, and one end of the outer wall of the ear plate is fixedly connected to the side wall of the U-shaped groove plate. Telescopic elastic members are fixedly connected to both sides of the bottom end of the ear plate.

[0014] Preferably, a sponge plate is fixedly connected to the bottom ends of the two telescopic elastic members, and the top outer wall of the sponge plate is movably sleeved with the bottom end of the screw. One end of the outer wall of the sponge plate is intermittently fitted and slidably connected to the other end of the LED surface light source body.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] This invention uses a motor on a U-shaped plate to rotate one of the gear rods. The passively rotating gear rod drives the other gear rod that meshes with it to rotate, creating a transmission effect. This causes the two toothed plates above to move along opposing paths. The two gear rods that drive each other can also synchronously drive the corresponding connected hemp rope to rotate and wind. The friction generated between the passively rotating hemp rope and the shaft frame causes the shaft frame and the baffle plate to rotate synchronously, resulting in an angle change. Different tilt positions can be created according to the angle determined by the operator to adjust the emitted light source to different degrees.

[0017] When the angle of the shielding plate is changed to 90 degrees, the top rod installed on the shielding plate will touch the first telescopic elastic component, causing it to move and extend the railing plate and the overlapping baffle plate simultaneously. This allows the metal railing plate to detach from the two magnetic plates installed on the outer wall of the U-shaped channel plate and no longer be magnetically connected to them. By driving the first telescopic elastic component and the railing plate, the overlapping baffle plate inside the U-shaped channel plate is extended, partially blocking the bright side of the LED surface light source body, making the light emitted more concentrated.

[0018] This invention utilizes a movable L-shaped support plate to engage with a spur gear, causing the screw to rotate. The rotation of the screw causes the connected L-shaped long plate and the sponge plate fixedly attached to its bottom to move downwards synchronously. During this downward movement, the sponge plate extends the lower half of the screw, and with the assistance of two telescopic elastic members installed at the bottom of the ear plate, the downward movement of the L-shaped long plate and the sponge plate is guided. When the spur gear and the toothed plate briefly disengage, the two telescopic elastic members immediately move the sponge plate upwards. Thus, the passively moving sponge plate can repeatedly wipe the surface of the LED light source, preventing dust accumulation and ensuring brightness. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall planar structure of the present invention.

[0021] Figure 3This is a schematic diagram of the overall partial structure of the present invention (one of them);

[0022] Figure 4 This is a schematic diagram of the overall partial cross-sectional structure of the present invention;

[0023] Figure 5 For the present invention Figure 4 A magnified view of the structure at point A in the middle;

[0024] Figure 6 For the present invention Figure 4 A magnified schematic diagram of the structure at point B in the middle;

[0025] Figure 7 This is a partial structural schematic diagram of the light source adjustment part of the present invention (one of the schematic diagrams);

[0026] Figure 8 This is a schematic diagram of the overall partial structure of the present invention (second part);

[0027] Figure 9 This is a partial structural schematic diagram (second part) of the light source adjustment part of the present invention.

[0028] In the picture:

[0029] 1. LED surface light source body;

[0030] 2. Light source adjustment unit; 21. Baffle plate; 22. Shaft bracket; 23. Magnetic plate; 24. U-shaped plate; 25. Motor; 26. Gear rod; 27. Tooth plate one; 28. Hemp rope; 29. ​​Limiting plate; 230. Torsion spring; 231. Bending fixed rod; 2310. Top rod; 232. U-shaped groove plate; 233. Rectangular slide; 234. Overlapping baffle; 235. Slider; 236. Guard plate; 237. Telescopic elastic component one; 238. L-shaped support plate; 239. Tooth plate two; 240. Spur gear; 241. Screw; 242. Sleeve rod; 243. Ear plate; 244. Telescopic elastic component two; 245. Sponge board. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1 to 9As shown, the present invention provides a multi-position LED surface light source adjustment mechanism, including an LED surface light source body 1, a light source adjustment part 2 on the LED surface light source body 1, and a light source adjustment part 2 including two shielding plates 21. The two shielding plates 21 can focus the light from both sides of the LED surface light source body 1. A shaft frame 22 is fixedly connected through one side plate of each shielding plate 21, and a top rod 2310 is fixedly connected to one side wall of each of the two shielding plates 21. A rotation and translation structure is provided on one outer wall of the LED surface light source body 1, which is used to drive the shielding plate 21 to tilt and move to focus and block light. Two meshing downward moving structures are provided above the rotation and translation structure, which are used to wipe the other end of the LED surface light source body 1.

[0033] Using the above scheme: the shaft frame 22 and the shielding plate 21 are passively rotated synchronously, resulting in an angle change. The shielding plate 21 and the magnetic plate 23 installed on the LED surface light source body 1 will be magnetically attracted to each other. During the passive angle change of the shielding plate 21, different tilt positions can be generated according to the angle required by manual judgment, thereby adjusting the emitted light source to different degrees.

[0034] The rotation and translation structure includes a U-shaped plate 24 fixedly connected to the outer wall of one end of the LED surface light source body 1. A forward and reverse rotating motor 25 is fixedly connected to one side of the outer wall of the U-shaped plate 24. Two gear rods 26 are movably sleeved through one side of the inner wall of the U-shaped plate 24. One end of one gear rod 26 is fixedly connected to the rotating shaft of the motor 25. A toothed plate 27 is meshed with the side wall of each gear rod 26. A hemp rope 28 is fixedly connected to the outer wall of the gear rod 26. The other end of the hemp rope 28 is fixedly connected to one side of the shaft frame 22. Two limiting discs 29 are also fixedly connected to the shaft frame 22. A torsion spring 230 is fixedly connected to the top outer wall of the upper limiting disc 29. A bent fixed rod 231 is fixedly connected to the top of the torsion spring 230. The top of the shaft frame 22 and the bottom inner wall of the bent fixed rod 231 are movably sleeved.

[0035] The above scheme is adopted as follows: by starting the motor 25 on the U-shaped plate 24, one of the gear rods 26 is driven to rotate. The passively rotating gear rod 26 can drive the other gear rod 26 meshing with it to rotate, generating a transmission effect. This drives the two toothed plates 27 above to move in opposite directions. The two gear rods 26 that drive each other can also drive the corresponding connected hemp rope 28 to rotate and wind. When the hemp rope 28 is passively rotated, it generates friction with the shaft frame 22, thereby driving the shaft frame 22 and the shielding plate 21 to rotate synchronously, resulting in an angle change. During the passive rotation of the shaft frame 22, the torsion spring 230 is also driven to deform synchronously. The torsion spring 230 can automatically drive the shaft frame 22 and the shielding plate 21 to reset when the tension on the hemp rope 28 is no longer applied. One end of the bent fixed rod 231 is fixed to the side wall at the top of the LED surface light source body 1 to limit its movement.

[0036] A U-shaped groove plate 232 is fixedly connected to the outer wall of the other end of the LED surface light source body 1. A rectangular sliding groove 233 is opened in the inner wall of the U-shaped groove plate 232. A shielding baffle 234 is slidably connected to the inner wall of the U-shaped groove plate 232. Multiple sliders 235 are fixedly connected to the outer walls of the upper and lower ends of the shielding baffle 234. The outer walls of both sets of sliders 235 are slidably connected to the rectangular sliding groove 233. One end of the outer wall of the shielding baffle 234 is fixedly connected to one end of the inner wall of the U-shaped groove plate 232. A magnetic plate 23 is fixedly connected to both sides of the outer wall of the U-shaped groove plate 232 and to the inner walls of both ends. A railing plate 236 is fixedly connected to the outer wall of the other end of the shielding baffle 234. A telescopic elastic member 237 is fixedly connected to the outer wall of one end of the railing plate 236. The telescopic elastic member 237 and the top rod 2310 can be intermittently connected.

[0037] Using the above scheme: When the angle of the shield 21 is changed to 90 degrees, the top rod 2310 installed on the shield 21 will touch the telescopic elastic component 237, causing it to move and extend the railing 236 and the overlapping baffle 234 simultaneously. This allows the metal railing 236 to detach from the two magnetic plates 23 installed on the outer wall of the U-shaped channel plate 232 and no longer be magnetically connected to them. By driving the telescopic elastic component 237 and the railing 236, the overlapping baffle 234 in the U-shaped channel plate 232 is extended, partially blocking the bright side of the LED surface light source body 1, making the light emitted more concentrated. When the overlapping baffle 234 is passively stretched and moved, it will be guided and limited to move within the rectangular groove 233 by the sliders 235 installed at the upper and lower ends.

[0038] Each of the two meshing downward moving structures includes an L-shaped support plate 238 fixedly connected to the top side wall of the toothed plate 27. A toothed plate 239 is fixedly connected to the top of the L-shaped support plate 238. The toothed plate 239 is specifically composed of two U-shaped smooth plates and two transverse toothed plates. A spur gear 240 is intermittently meshed with one end of each of the two transverse toothed plates. A screw 241 is fixedly connected to the spur gear 240. A sleeve rod 242 is movably sleeved on the spur gear 240. The inner wall of the sleeve rod 242 is movably sleeved with a section of the screw rod 241. The lower section of the screw rod 241 is specifically a telescopic rod, and the upper section of the screw rod 241 also has... The screw 241 is connected to an L-shaped long plate, and one end of the rod 242 is fixedly connected to the top side wall of the U-shaped groove plate 232. The screw 241 is also rotatably connected to an ear plate 243. One end of the outer wall of the ear plate 243 is fixedly connected to the side wall of the U-shaped groove plate 232. The two outer walls of the bottom end of the ear plate 243 are fixedly connected to telescopic elastic members 244. The bottom ends of the two telescopic elastic members 244 are jointly fixedly connected to a sponge plate 245. The top outer wall of the sponge plate 245 is also movably connected to the bottom end of the screw 241. One end of the outer wall of the sponge plate 245 is intermittently fitted and slidably connected to the other end of the LED surface light source body 1.

[0039] Using the above scheme: the moving L-shaped support plate 238 will drive the connected toothed plate 239 to mesh with the spur gear 240, which will simultaneously drive the screw 241 to rotate. The rotation of the screw 241 will drive the connected L-shaped long plate and the sponge plate 245 fixedly connected to the bottom of the L-shaped long plate to move down synchronously. During the downward movement, the sponge plate 245 will simultaneously cause the lower half of the screw 241 to extend. With the assistance of the two telescopic elastic members 244 installed on the bottom of the ear plate 243, the downward movement of the L-shaped long plate and the sponge plate 245 will be guided. When the spur gear 240 and the toothed plate 239 briefly stop meshing, the two telescopic elastic members 244 will immediately drive the sponge plate 245 to move up. Thus, the sponge plate 245, which is passively moving up and down, can repeatedly wipe the light source surface of the LED surface light source body 1 locally, so as to avoid dust covering its surface and affecting the brightness of the light source.

[0040] The working principle and usage process of this invention are as follows: Starting the motor 25 on the U-shaped plate 24 drives one of the gear rods 26 to rotate. This passively rotating gear rod 26 drives the other meshing gear rod 26 to rotate, creating a transmission effect. This causes the two upper gear plates 27 to move along opposing paths. The two mutually transmitting gear rods 26 also synchronously drive the corresponding connected hemp rope 28 to rotate and wind. The passive rotation of the hemp rope 28 generates friction with the shaft frame 22, causing the shaft frame 22 and the baffle plate 21 to rotate synchronously, resulting in an angle change. During the passive rotation of the shaft frame 22, the torsion spring 230 is also simultaneously deformed. The torsion spring 230 allows the shaft frame 22 and the baffle plate 21 to automatically reset when the tension on the hemp rope 28 is no longer applied. During the passive angle change of the baffle plate 21, different tilts can be generated according to manual judgment. The light source is adjusted to different degrees at an angle until the angle of the shield 21 is changed to 90 degrees. The top rod 2310 installed on the shield 21 will touch the telescopic elastic element 237, causing the guardrail 236 and the overlapping baffle 234 to move and extend synchronously. This allows the metal guardrail 236 to detach from the two magnetic plates 23 installed on the outer wall of the U-shaped groove 232 and no longer be magnetically connected to them. By driving the telescopic elastic element 237 and the guardrail 236, the overlapping baffle 234 in the U-shaped groove 232 is extended, partially blocking the bright side of the LED surface light source body 1, making the light emitted more concentrated. When the overlapping baffle 234 is passively stretched and moved, it will be guided and limited to move in the rectangular groove 233 by the sliders 235 installed at the upper and lower ends. This achieves multi-position brightness adjustment of the light source surface of the LED surface light source body 1, improving the flexibility of the LED surface light source body 1.

[0041] Simultaneously, as the toothed plate 27 passively translates, it also synchronously drives the L-shaped support plate 238 to translate in the same direction. The moving L-shaped support plate 238 then drives the connected toothed plate 239 to mesh with the spur gear 240, causing it to simultaneously rotate the screw 241. The rotation of the screw 241 causes the connected L-shaped long plate and the sponge plate 245 fixedly connected to the bottom end of the L-shaped long plate to move downwards synchronously. During this downward movement, the sponge plate 245 simultaneously causes the lower half of the screw 241 to extend. With the assistance of two telescopic elastic members 244 installed on the bottom end of the ear plate 243, the downward movement of the L-shaped long plate and the sponge plate 245 is guided. Furthermore, when the spur gear 240 and the toothed plate 239 briefly disengage, the two telescopic elastic members... The second elastic component 244 will immediately move the sponge plate 245 upward. Through the passive up-and-down reciprocating movement of the sponge plate 245, the light source surface of the LED surface light source body 1 can be wiped repeatedly in a localized manner to prevent dust from covering its surface and affecting the brightness of the light source. In addition, the upward movement of the elastic component 244 will drive the L-shaped long plate to move upward synchronously, thereby driving the spur gear 240 and the screw 241 to reverse briefly. Thus, while changing the angle of the shielding plate 21, it can also drive the overlapping shielding plate 234 to extend, making the light source surface emitted by the LED surface light source body 1 more concentrated, while also shielding the dust on both sides. Finally, it will also wipe the middle surface of the LED surface light source body 1 that is always exposed at one end to prevent dust from covering it and deteriorating the illumination effect, thereby increasing its practicality.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanism for adjusting a multi-position LED surface light source, comprising an LED surface light source body (1), characterized in that: The LED surface light source body (1) is provided with a light source adjustment part (2), which includes two shielding plates (21). The two shielding plates (21) can focus the light on both sides of the LED surface light source body (1). A shaft frame (22) is fixedly connected through one side plate of each shielding plate (21), and a top rod (2310) is fixedly connected to one end side wall of each shielding plate (21). A rotation and translation structure is provided on one end outer wall of the LED surface light source body (1) to drive the shielding plate (21) to tilt and move to focus and block light. Two meshing downward structures are provided above the rotation and translation structure to wipe the other end of the LED surface light source body (1). The rotation and translation structure includes a U-shaped plate (24) fixedly connected to the outer wall of one end of the LED surface light source body (1). Two gear rods (26) are movably sleeved through one side inner wall of the U-shaped plate (24). A toothed plate (27) is meshed with the side wall of each gear rod (26). Each of the two meshing downward structures includes an L-shaped support plate (238) fixedly connected to the top side wall of the toothed plate (27). A toothed plate (239) is fixedly connected to the top of the L-shaped support plate (238). The toothed plate (239) is specifically composed of two U-shaped smooth plates and two transverse toothed plates. A spur gear (240) can be intermittently meshed with one end of each of the two transverse toothed plates. A screw (241) is fixedly connected to the spur gear (240), and a sleeve (242) is movably sleeved on the spur gear (240). The inner wall of the sleeve (242) and a section of the screw (241) are movably sleeved together. The lower section of the screw (241) is specifically a telescopic rod. An L-shaped long plate is threadedly connected to the upper half of the screw (241), and one end of the sleeve (242) is specifically fixedly connected to the top side wall of the U-shaped groove plate (232). The screw (241) is also rotatably connected to an ear plate (243). One end of the outer wall of the ear plate (243) is fixedly connected to the side wall of the U-shaped groove plate (232). The two sides of the bottom end of the ear plate (243) are fixedly connected to a telescopic elastic element (244). The bottom ends of the two telescopic elastic components (244) are fixedly connected to a sponge plate (245). The top outer wall of the sponge plate (245) is also movably sleeved with the bottom end of the screw (241). The outer wall of one end of the sponge plate (245) and the outer wall of the other end of the LED surface light source body (1) are intermittently fitted and slidably connected.

2. The adjustment mechanism for a multi-position LED surface light source according to claim 1, characterized in that: A forward and reverse rotating motor (25) is fixedly connected to one side of the outer wall of the U-shaped plate (24), and one end of the gear rod (26) is fixedly connected to the rotating shaft of the motor (25).

3. The adjustment mechanism for a multi-position LED surface light source according to claim 2, characterized in that: A hemp rope (28) is fixedly connected to the outer wall of the gear rod (26). The other end of the hemp rope (28) is fixedly connected to one side of the shaft frame (22). Two limiting discs (29) are also fixedly connected to the shaft frame (22). A torsion spring (230) is fixedly connected to the top outer wall of the upper limiting disc (29). A bent fixed rod (231) is fixedly connected to the top of the torsion spring (230). The top of the shaft frame (22) and the bottom inner wall of the bent fixed rod (231) are movably connected.

4. The adjustment mechanism for a multi-position LED surface light source according to claim 3, characterized in that: A U-shaped groove plate (232) is fixedly connected to the outer wall of the other end of the LED surface light source body (1). A rectangular sliding groove (233) is opened in the inner wall of the U-shaped groove plate (232). A shielding baffle (234) is slidably connected in the inner wall of the U-shaped groove plate (232).

5. The adjustment mechanism for a multi-position LED surface light source according to claim 4, characterized in that: Multiple sliders (235) are fixedly connected to the outer walls of the upper and lower ends of the overlapping baffle (234). The outer walls of the two sets of sliders (235) are in close contact with the rectangular sliding groove (233). The outer wall of one end of the overlapping baffle (234) is fixedly connected to the inner wall of one end of the U-shaped groove plate (232). A magnetic plate (23) is fixedly connected to both sides of the outer wall of the U-shaped groove plate (232) and the inner walls of both ends.

6. The adjustment mechanism for a multi-position LED surface light source according to claim 5, characterized in that: A railing (236) is fixedly connected to the outer wall of the other end of the overlapping baffle (234). A telescopic elastic member (237) is fixedly connected to the outer wall of one end of the railing (236). The telescopic elastic member (237) and the top rod (2310) can be intermittently fitted together.

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