Liftable dart target disc

Abstract

The present application relates to the technical field of dart target disc, and particularly relates to a liftable dart target disc, which comprises a target disc body, the target disc body comprises a target front body, one side of the target front body is fixedly connected with a target middle body, one side of the target middle body is fixedly connected with a target rear body, an annular groove is formed in one side of the target middle body, four rocker arm assemblies are annularly and equidistantly connected to the side wall of the annular groove, and straight grooves are formed in the two sides of the side wall of the target rear body. In the present application, through the arrangement of the driving assembly and the four rocker arm assemblies, the driving assembly drives the plurality of rotating seats to rotate clockwise, thereby driving the arc arm to rotate clockwise, so that the arc arm drives the curtain to expand outward, the outer edge of the curtain is dragged to rotate the rotary frame when expanding, so that the inner side of the curtain rotates, the torsion of the curtain is reduced, the background wall is protected through the curtain, the dart out of the target is intercepted through the curtain, and the damage of the dart out of the target to the background wall is reduced.

Description

Technical Field

[0001] This invention relates to the field of dartboard technology, specifically to a liftable dartboard. Background Technology

[0002] For a long time, the origin of darts has been thought to be javelin, crossbow, or archery, but archery is the most likely source of darts. As an indoor recreational sport, existing dartboards are mostly hung on the wall or behind the door when placed indoors. When the user's aim is not good enough, the darts will easily miss the target and stick to the background wall or door, thus damaging the wall or door and detracting from the aesthetics of the room. There is a need for a height-adjustable dartboard with built-in protection. Summary of the Invention

[0003] To overcome the aforementioned technical problems, the present invention aims to provide a height-adjustable dartboard. Through the arrangement of a drive assembly and four rocker arm assemblies, the drive assembly drives multiple rotating seats to rotate clockwise, thereby causing the arc arms to rotate clockwise. This causes the arc arms to unfold the curtain outwards. As the outer edge of the curtain unfolds, it drags the rotating frame to rotate, causing the inner side of the curtain to rotate, reducing the curtain's twisting. This achieves the goal of protecting the background wall with the curtain, intercepting stray darts, reducing damage to the background wall, and adjusting and supporting the height of the dartboard body via a lifting bracket.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A height-adjustable dartboard includes a target board body. The target board body includes a target front body, a target middle body fixedly connected to one side of the target front body, and a target rear body fixedly connected to one side of the target middle body. An annular groove is formed on the outer side of one side of the target middle body. Four rocker arm assemblies are rotatably connected to one side wall of the annular groove at equal intervals. Straight grooves are formed on both sides of one side wall of the target rear body. A lifting bracket is rotatably connected between the inner walls of two straight grooves. A drive assembly is rotatably connected to one side wall of the target middle body. Each rocker arm assembly includes a rotating seat. One end of the rotating seat is fixedly connected to a shaft one. One end of the shaft one is rotatably sleeved with a shaft two. One end of the shaft two is fixedly connected to an arc arm. The other end of the rotating seat is rotatably connected to the inner wall of the annular groove. A curtain is fixedly connected to one end of each of the four arc arms. A rotating frame is rotatably connected to the middle of the annular outer wall of the target body. The curtain is fixedly connected to the rotating frame. When the curtain needs to be unfolded, the driving component drives multiple rotating seats to rotate clockwise, thereby driving the arc arms to rotate clockwise. This causes the arc arms to unfold the curtain outward. When the outer edge of the curtain unfolds, it drags the rotating frame to rotate, causing the inner side of the curtain to rotate, reducing the twisting of the curtain. This allows the curtain to protect the background wall, intercept the darts that have missed the target, and reduce the damage to the background wall. The height of the target plate body is adjusted and supported by the lifting bracket.

[0006] Furthermore, the other end of the rotating seat is fixedly connected to a spur gear, the driving assembly includes a cross, the cross is rotatably connected to one side wall of the target body, the four ends of the cross are all fixedly connected to arc tooth plates, the multiple arc tooth plates correspond one-to-one with multiple spur gears, and the cross meshes with the corresponding spur gears. A second venting groove is opened in the middle of the other side wall of the target body, and a first venting groove is opened in the other side wall of the target body corresponding to the positions of multiple spur gears. By rotating the cross, multiple rotating seats are driven to rotate, thereby driving the arc arm to deflect and retract.

[0007] Furthermore, a bevel gear is fixedly sleeved on the outer wall of the second shaft. An embedding groove 2 is formed on the other side wall of the target's rear body at the outer position of each of the multiple venting grooves 1. An embedding groove 1 is formed on the inner wall of the annular groove at the corresponding position of each of the multiple embedding groove 2. A rocker arm is fixedly connected to the inner wall of one end of each embedding groove 2. The rocker arm meshes with the bevel gear, so that when the second shaft rotates clockwise, the bevel gear meshes with the corresponding rocker arm, causing the second shaft to rotate clockwise around its own central axis. This causes one end of the arc arm to deflect towards the front of the target, thereby causing the outer edge of the curtain to move away from the background wall, increasing the curtain's... The distance between the curtain and the background wall is determined by the overall thickness of the target plate. Because the annular groove is relatively close to the background wall after the target's rear body is in contact with it, and the edge of the curtain is also close to the background wall after the arc arm is extended, the curtain's protective effect is limited. By using a bevel gear, when the second shaft rotates clockwise, the bevel gear meshes with the corresponding rocker arm, causing the second shaft to rotate clockwise around its central axis. This causes one end of the arc arm to deflect towards the front of the target, thus moving the outer edge of the curtain away from the background wall, increasing the overall distance between the curtain and the background wall, and improving the curtain's protective effect.

[0008] Furthermore, a torsion spring is fixedly connected between the outer wall of the first shaft and the inner wall of the second shaft. A limiting block is fixedly connected to the outer wall of one end of the first shaft and the inner wall of one end of the second shaft. The limiting block is used to limit the rotation angle of the second shaft. When the curtain is retracted, the torsion of the torsion spring and the setting of the limiting block limit the rotation angle of the second shaft and the arc arm. This prevents the arc arm from deflecting and tilting under its own weight and external force after the bevel gear disengages from the rocker arm, so that multiple arc arms are in the same plane, which facilitates the arc arm entering the annular groove.

[0009] Furthermore, a fan-shaped groove is provided on the other side of the target body. The bottom end of the fan-shaped groove penetrates the target body and communicates with one side wall of the target body. A rocker arm is provided inside the fan-shaped groove. The bottom end of the rocker arm is fixedly connected to the cross. A sleeve is slidably sleeved on the top end of the rocker arm. An insertion rod is fixedly connected to the bottom surface of the sleeve. Insertion holes are provided on both sides of the annular outer wall of the target body corresponding to the fan-shaped groove. The insertion holes fit with the insertion rods, so that the sleeve and the front body of the target are located on the same side of the curtain, which facilitates the operation of the sleeve. At the same time, the setting of the insertion holes and insertion rods restricts the angle between the rocker arm and the cross, indirectly restricting the unfolding and retraction of the curtain.

[0010] Furthermore, the lifting support includes two main rods. A slide rod is slidably connected to the inner wall of the main rod, and a secondary rod is rotatably connected to the bottom end of the slide rod. The secondary rod has a U-shaped cross-section, and support rods are rotatably connected to the inner wall of the secondary rod on both sides of the bottom end of the slide rod. A slot is provided on the outer side wall of the bottom end of the slide rod. The top of the main rod is rotatably connected to the inner walls of the adjacent straight groove. A fastening knob is screwed onto one side wall of the bottom end of the main rod. When the device needs to be placed on the ground, the secondary rod and the crossbar are deflected to the lower side of the target plate body. Then, the secondary rod is rotated so that the secondary rod and the slide rod form an inverted T-shape. One end of the support rod is engaged with the slot on the secondary rod, so that the slide rod and the secondary rod remain perpendicular. Through the sliding setting of the slide rod and the main rod and the setting of the fastening knob, the effective length between the slide rod and the main rod can be adjusted, thereby adjusting the height of the target plate body.

[0011] Furthermore, the rotation axis at the top of the auxiliary rod is located in the upper half of the straight groove, which makes it convenient for the target plate body to maintain a vertical posture under the action of gravity when it is placed upright or hung.

[0012] Furthermore, a crossbar is fixedly connected between one end of the two auxiliary rods, which facilitates the hanging and placement of the device via the crossbar.

[0013] Furthermore, the curtain is made of elastic fabric, which facilitates the extension, tension, and contraction of the curtain.

[0014] Furthermore, the arc arm is an elastic arm, which facilitates the tensioning of the curtain.

[0015] The beneficial effects of this invention are:

[0016] 1. Through the setup of the drive assembly and four rocker arm assemblies, the drive assembly drives multiple rotating seats to rotate clockwise, which in turn drives the arc arm to rotate clockwise. This causes the arc arm to unfold the curtain outward. As the outer edge of the curtain unfolds, it drags the rotating frame to rotate, causing the inner side of the curtain to rotate, reducing the curtain's twisting. This achieves the goal of protecting the background wall with the curtain, intercepting stray darts, and reducing damage to the background wall. The lifting bracket adjusts and supports the height of the target plate itself.

[0017] 2. By using a bevel gear, the annular groove is close to the background wall after the target's rear body is in contact with it, and the edge of the curtain is also close to the background wall after the arc arm is unfolded, which limits the curtain's protective effect. The bevel gear allows the shaft to mesh with the corresponding rocker arm when it rotates clockwise. This causes the shaft to rotate clockwise around its central axis, causing one end of the arc arm to deflect towards the front of the target. Consequently, the outer edge of the curtain moves away from the background wall, increasing the overall distance between the curtain and the background wall and improving the curtain's protective effect.

[0018] 3. By setting up the lifting bracket, the auxiliary rod and crossbar are deflected to the lower side of the target plate body. Then, the auxiliary rod is rotated so that the auxiliary rod and the sliding rod form an inverted T shape. One end of the support rod is engaged with the slot on the auxiliary rod, so that the sliding rod and the auxiliary rod are kept perpendicular. This makes it easy to place the device on the ground. At the same time, the lifting bracket makes it easy to hang the device on the wall, which facilitates the placement of the target plate body. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall hanging state structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall upright structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the lifting support structure in this invention;

[0023] Figure 4 This is a side view of the target disk body structure in this invention;

[0024] Figure 5 This is a schematic diagram of the target disk body structure in this invention;

[0025] Figure 6 This is a schematic diagram of the target body structure in this invention;

[0026] Figure 7 This is a schematic diagram of the exploded structure of the target disk body in this invention;

[0027] Figure 8 This is a schematic diagram of the rocker arm assembly structure in this invention;

[0028] Figure 9 This is a schematic diagram of the rotating seat and shaft structure in this invention;

[0029] Figure 10 This is a schematic diagram of the driving component structure in this invention.

[0030] In the diagram: 100, Target plate body; 110, Target front body; 120, Target middle body; 121, Sector groove; 122, Insertion hole; 123, Annular groove; 124, Embedding groove one; 130, Target rear body; 131, Straight groove; 132, Embedding groove two; 133, Venting groove one; 134, Venting groove two; 140, Rocker arm assembly; 141, Rotating seat; 142, Shaft one; 143, Torsion spring; 144, Shaft two ; 145. Bevel gear; 146. Arc arm; 147. Spur gear; 150. Drive assembly; 151. Rocker arm; 152. Sleeve; 153. Insert rod; 154. Cross; 155. Arc tooth plate; 160. Rotating frame; 170. Curtain; 200. Lifting bracket; 210. Main rod; 211. Fastening knob; 220. Slide rod; 221. Slot; 230. Secondary rod; 240. Support rod; 250. Crossbar. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-10As shown, a height-adjustable dartboard includes a target board body 100, which includes a target front body 110. A target middle body 120 is fixedly connected to one side of the target front body 110, and a target rear body 130 is fixedly connected to one side of the target middle body 120. An annular groove 123 is formed on the outer side of one side of the target middle body 120. Four rocker arm assemblies 140 are rotatably connected to one side wall of the annular groove 123 at equal intervals. Straight grooves 131 are formed on both sides of one side wall of the target rear body 130. A lifting bracket 200 is rotatably connected between the inner walls of two straight grooves 131. A drive assembly 150 is rotatably connected to one side wall of the target middle body 120. The rocker arm assembly 140 includes a rotating seat 141. A shaft 142 is fixedly connected to one end of the rotating seat 141. A shaft 2 144 is rotatably sleeved at one end of the shaft 142. An arc arm 146 is fixedly connected to one end of the shaft 2 144. The other end of the seat 141 is rotatably connected to the inner wall of the annular groove 123. A curtain 170 is fixedly connected to one end of each of the four arc arms 146. A rotating frame 160 is rotatably connected to the middle of the annular outer wall of the target body 120. The curtain 170 is fixedly connected to the rotating frame 160. When the curtain 170 needs to be unfolded, the drive component 150 drives the multiple rotating seats 141 to rotate clockwise, thereby driving the arc arms 146 to rotate clockwise. This causes the arc arms 146 to drive the curtain 170 to unfold outward. When the outer edge of the curtain 170 unfolds, it drags the rotating frame 160 to rotate, causing the inner side of the curtain 170 to rotate, reducing the torsion of the curtain 170. This allows the curtain 170 to protect the background wall and intercept the darts that have missed the target, reducing the damage to the background wall caused by the darts. The height of the target plate body 100 is adjusted and supported by the lifting bracket 200.

[0033] A spur gear 147 is fixedly connected to the other side wall of the rotating seat 141. The drive assembly 150 includes a cross 154, which is rotatably connected to one side wall of the target body 120. Arcuate tooth plates 155 are tightly and uniformly fixed to the four ends of the cross 154. Multiple arc tooth plates 155 correspond one-to-one with multiple spur gears 147, and the cross 154 meshes with the corresponding spur gear 147. A venting groove 134 is provided in the middle of the other side wall of the target rear body 130, and venting grooves are provided at the positions of the multiple spur gears 147 on the other side wall of the target rear body 130. 133, by rotating the cross 154, multiple rotating seats 141 are driven to rotate, thereby causing the arc arm 146 to deflect and extend. A bevel gear 145 is fixedly sleeved on the outer wall of the shaft 144. The other side wall of the target rear body 130 is provided with an embedding groove 132 at the outer position of multiple venting grooves 133. The inner side wall of the annular groove 123 is provided with an embedding groove 124 corresponding to the position of multiple embedding grooves 132. A rocker arm 151 is fixedly connected to the inner side wall of one end of the embedding groove 132. The rocker arm 151 is used to mesh with the bevel gear 145, so that the shaft 144... 4. When rotating clockwise, the bevel gear 145 meshes with the corresponding rocker arm 151, causing the shaft 144 to rotate clockwise around its own central axis. This causes one end of the arc arm 146 to deflect towards the front of the target 110, thereby causing the outer edge of the screen 170 to move away from the background wall, increasing the distance between the screen 170 and the background wall. Considering the overall thickness of the target plate body 100, since the annular groove 123 is closer to the background wall after the rear of the target 130 is in contact with the background wall, the screen 170 will be flattened after the arc arm 146 is extended. The edge of the 70 is close to the background wall, which limits the protective effect of the curtain 170. By setting the bevel gear 145, when the shaft 144 rotates clockwise, the bevel gear 145 meshes with the corresponding rocker arm 151, so that the shaft 144 rotates clockwise and drives the shaft 144 to rotate around its own central axis. This causes one end of the arc arm 146 to deflect towards the target front body 110, thereby causing the outer edge of the curtain 170 to move away from the background wall, increasing the distance between the curtain 170 and the background wall, and improving the protective effect of the curtain 170.

[0034] A torsion spring 143 is fixedly connected between the outer wall of shaft 142 and the inner wall of shaft 144. Limiting blocks are fixedly connected to the outer wall of one end of shaft 142 and the inner wall of one end of shaft 144. These limiting blocks restrict the rotation angle of shaft 144. When the curtain 170 is retracted, the torque of the torsion spring 143 and the limiting blocks restrict the rotation angle of shaft 144 and the arc arm 146, preventing the arc arm 146 from deflecting under its own weight and external force after the bevel gear 145 disengages from the rocker arm 151. This ensures that multiple arc arms 146 are in the same plane, facilitating their entry into the annular groove 123. A fan-shaped groove 121 is provided on the other side of the target body 120. The bottom end penetrates through the target body 120 and communicates with one side wall of the target body 120. A rocker arm 151 is provided inside the fan-shaped groove 121. The bottom end of the rocker arm 151 is fixedly connected to the cross 154. A sleeve 152 is slidably sleeved on the top end of the rocker arm 151. An insertion rod 153 is fixedly connected to the bottom surface of the sleeve 152. An insertion hole 122 is provided on both sides of the annular outer wall of the target body 120 corresponding to the fan-shaped groove 121. The insertion hole 122 fits with the insertion rod 153, so that the sleeve 152 and the front body 110 of the target are both located on the same side of the curtain 170, which facilitates the operation of the sleeve 152. At the same time, the setting of the insertion hole 122 and the insertion rod 153 restricts the angle between the rocker arm 151 and the cross 154, indirectly restricting the opening and closing of the curtain 170.

[0035] The lifting support 200 includes two main rods 210. A slide rod 220 is slidably connected to the inner wall of each main rod 210. A secondary rod 230 is rotatably connected to the bottom end of the slide rod 220. The secondary rod 230 has a U-shaped cross-section. Support rods 240 are rotatably connected to the inner wall of the secondary rod 230 on both sides of the bottom end of the slide rod 220. Slots 221 are provided on the outer side walls of both sides of the bottom end of the slide rod 220. The top of the main rod 210 is rotatably connected to the inner walls of the adjacent straight groove 131. A fastening knob 211 is screwed onto one side wall of the bottom end of the main rod 210. When the device needs to be placed on the ground, the secondary rod 230 and the crossbar 250 are deflected to the underside of the target plate body 100. Then, the secondary rod 230 is rotated so that it forms an inverted T-shape with the slide rod 220. One end of the support rod 240 is then connected to the secondary rod. The slot 221 on 230 engages, thus keeping the slide rod 220 and the auxiliary rod 230 perpendicular. Through the sliding setting of the slide rod 220 and the main rod 210, and the setting of the fastening knob 211, the effective length between the slide rod 220 and the main rod 210 can be adjusted, thereby adjusting the height of the target plate body 100. The rotation axis at the top of the auxiliary rod 230 is located in the upper half of the straight groove 131, which makes it easy for the target plate body 100 to maintain a vertical posture under the action of gravity when standing or hanging. A crossbar 250 is fixed between one end of the two auxiliary rods 230, which makes it easy to hang the device. The curtain 170 is made of elastic fabric, which makes it easy to extend, tighten and shrink the curtain 170. The arc arm 146 is an elastic arm, which makes it easy to tighten the curtain 170.

[0036] Working principle: In the initial state, the four arc arms 146 are housed within the annular groove 123, and the arc arms 146 also partially house the curtain 170 within the annular groove 123. When the curtain 170 needs to be unfolded, the upper sleeve 152 is moved up, causing the insertion rod 153 to disengage from the right insertion hole 122. The rocker arm 151 is then deflected to the left, causing the rocker arm 151 to rotate the cross 154 counterclockwise. The cross 154, through the arc tooth plate 155, drives multiple spur gears 147 to rotate clockwise. The spur gears 147 drive the rotating seat 141 to rotate clockwise, thereby causing the arc arms 146 to rotate clockwise. This causes the arc arms 146 to unfold the curtain 170 outward. As the outer edge of the curtain 170 unfolds, it drags the rotating frame 160 to rotate, causing the inner side of the curtain 170 to rotate, reducing... When the curtain 170 twists, and the shaft 144 rotates clockwise, the bevel gear 145 meshes with the corresponding rocker arm 151, causing the shaft 144 to rotate clockwise around its own central axis. This causes one end of the arc arm 146 to deflect towards the target front 110, thereby moving the outer edge of the curtain 170 away from the background wall and increasing the distance between the curtain 170 and the background wall. After the rocker arm 151 deflects to the left, the sleeve 152 moves down so that the insertion rod 153 is inserted into the insertion hole 122 on the left. This limits the unfolded arc arm 146 through the cross 154, thus achieving the protection of the background wall through the curtain 170 and the interception of the off-target dart by the curtain 170, reducing the damage of the off-target dart to the background wall.

[0037] When the curtain 170 needs to be retracted, the rocker arm 151 is deflected to the right, causing the rotating seat 141, the second shaft 144, and the arc arm 146 to rotate counterclockwise around the other end of the rotating seat 141. At the same time, multiple arc arms 146 rotate in the opposite direction around the central axis of the second shaft 144 until multiple arc arms 146 are in the same plane. Through the torque of the torsion spring 143 and the setting of the limiting block, the rotation angle of the second shaft 144 and the arc arm 146 is limited, so as to prevent the arc arm 146 from deflecting and tilting under its own weight and external force after the bevel gear 145 disengages from the rocker arm 151, and to facilitate the arc arm 146 to enter the annular groove 123.

[0038] When placing the device, the target plate body 100 is suspended from the hook on the background wall by the crossbar 250. When the device needs to be placed on the ground, the auxiliary rod 230 and the crossbar 250 are deflected to the lower side of the target plate body 100. Then, the auxiliary rod 230 is rotated so that the auxiliary rod 230 and the slide rod 220 form an inverted T shape. One end of the support rod 240 is engaged with the slot 221 on the auxiliary rod 230, so that the slide rod 220 and the auxiliary rod 230 remain perpendicular. Since the center of gravity of the target plate body 100 is located below the rotation axis at the top of the main rod 210, the target plate body 100 is in contact with the main rod 210 under its own weight. By sliding the slide rod 220 and the main rod 210 and by fastening the knob 211, the effective length between the slide rod 220 and the main rod 210 can be adjusted, thereby adjusting the height of the target plate body 100.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A retractable dartboard, comprising a target board body (100), characterized in that, The target body (100) includes a target front body (110), a target middle body (120) is fixedly connected to one side of the target front body (110), a target rear body (130) is fixedly connected to one side of the target middle body (120), an annular groove (123) is provided on the outer side of one side of the target middle body (120), four rocker arm assemblies (140) are rotatably connected to one side wall of the annular groove (123) at equal intervals, and straight grooves (131) are provided on both sides of one side wall of the target rear body (130), and a lifting bracket (200) is rotatably connected between the inner walls of the two straight grooves (131). A drive assembly (150) is rotatably connected to one side wall of the target body (140). The rocker arm assembly (140) includes a rotating seat (141). One end of the rotating seat (141) is fixedly connected to a shaft (142). One end of the shaft (142) is rotatably sleeved with a shaft (144). One end of the shaft (144) is fixedly connected to an arc arm (146). The other end of the rotating seat (141) is rotatably connected to the inner wall of the annular groove (123). A curtain (170) is fixedly connected between one end of each of the four arc arms (146). A rotating frame (160) is rotatably connected to the middle position of the annular outer wall of the target body (120). The curtain (170) is fixedly connected to the rotating frame (160). A spur gear (147) is fixedly connected to the other side wall of the rotating base (141). The drive assembly (150) includes a cross (154). The cross (154) is rotatably connected to one side wall of the target body (120). Arcuate plates (155) are tightly and evenly fixed to the four ends of the cross (154). Multiple arc-tooth plates (155) correspond one-to-one with multiple spur gears (147), and the cross (154) meshes with the corresponding spur gear (147). A venting groove (134) is provided in the middle of the other side wall of the target rear body (130). The other side wall of the target rear body (130) is provided with a venting groove (133) corresponding to the position of multiple spur gears (147). A bevel gear (145) is fixedly sleeved on the outer side wall of the shaft (144). An embedding groove (132) is provided on the other side wall of the target rear body (130) at the position of the outer side of the multiple venting grooves (133). An embedding groove (124) is provided on the inner side wall of the annular groove (123) corresponding to the position of the multiple embedding grooves (132). A first rocker arm is fixedly connected to the inner side wall of one end of the embedding groove (132). The first rocker arm is used to mesh with the bevel gear (145).

2. The adjustable dartboard according to claim 1, characterized in that, A torsion spring (143) is fixedly connected between the outer wall of the first shaft (142) and the inner wall of the second shaft (144). A limit block is fixedly connected to the outer wall of one end of the first shaft (142) and the inner wall of one end of the second shaft (144). The limit block is used to limit the rotation angle of the second shaft (144).

3. The adjustable dartboard according to claim 1, characterized in that, A fan-shaped groove (121) is provided on the other side of the target body (120). The bottom end of the fan-shaped groove (121) penetrates the target body (120) and communicates with one side wall of the target body (120). A second rocker is provided inside the fan-shaped groove (121). The bottom end of the second rocker is fixedly connected to the cross (154). A sleeve (152) is slidably sleeved on the top end of the second rocker. An insertion rod (153) is fixedly connected to the bottom surface of the sleeve (152). An insertion hole (122) is provided on both sides of the annular outer wall of the target body (120) corresponding to the two sides of the fan-shaped groove (121). The insertion hole (122) fits into the insertion rod (153).

4. A height-adjustable dartboard according to claim 1, characterized in that, The lifting support (200) includes two main rods (210). A slide rod (220) is slidably connected to the inner wall of the main rod (210). A secondary rod (230) is rotatably connected to the bottom end of the slide rod (220). The cross-section of the secondary rod (230) is U-shaped. Support rods (240) are rotatably connected to the inner wall of the secondary rod (230) on both sides of the bottom end of the slide rod (220). A slot (221) is provided on both sides of the outer wall of the bottom end of the slide rod (220). The top of the main rod (210) is rotatably connected to the inner walls of both sides of the adjacent straight groove (131). A fastening knob (211) is screwed onto one side wall of the bottom end of the main rod (210).

5. A height-adjustable dartboard according to claim 4, characterized in that, The rotation axis at the top of the auxiliary rod (230) is located in the upper half of the straight groove (131).

6. A height-adjustable dartboard according to claim 4, characterized in that, A crossbar (250) is fixedly connected between one end of the two auxiliary rods (230).

7. A height-adjustable dartboard according to any one of claims 1-6, characterized in that, The curtain (170) is made of elastic fabric.

8. A height-adjustable dartboard according to any one of claims 1-6, characterized in that, The arc arm (146) is an elastic arm.

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