seesaw

Abstract

The utility model discloses a seesaw, include: support seat, the middle section pivot is located in the seesaw of support seat top end part, set up on the seesaw and be used for matching the balance adjusting device of adjusting seesaw both ends weight, the balance adjusting device includes: the counterweight strip of slidable setting in seesaw one end and along seesaw length direction extension predetermined length, fixed in counterweight strip and along the length direction extension of counterweight gear rack, pivot is located in the predetermined position of seesaw and with gear rack meshing gear, set up on the seesaw and be used for when locking counterweight strip of counterweight strip movement in place locking piece, and be used for the drive handle of driving gear rotation, this embodiment can drive counterweight strip to slide to the appropriate position in the length direction of seesaw by gear drive gear rack through operating drive handle, thereby matching the body weight of the player who sits respectively in seesaw both ends, make the weight of loading in seesaw both ends not too big difference, be favorable to seesaw more smoothly swing up and down, whole adjustment operation is very simple and laborsaving.

Description

Technical Field

[0001] This utility model relates to the field of amusement and fitness equipment technology, and in particular to a seesaw. Background Technology

[0002] Seesaws are a popular recreational and fitness equipment enjoyed by many players, including children and adults. When using a seesaw, it can be quite difficult to move the seesaw up and down when the weight difference between the players sitting at opposite ends is significant. To address this, some existing seesaws are equipped with balance adjustment mechanisms.

[0003] Existing seesaw balance adjustment devices mainly include: a counterweight mounted on the seesaw and movable along the length of the seesaw; a push rod for pushing the counterweight along the length of the seesaw; and a locking device for locking the counterweight in its corresponding position when it has moved to the correct position. This existing seesaw balance adjustment device requires the push rod to push the counterweight, which is laborious to operate. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a seesaw that can be easily adjusted for counterweight balance.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a seesaw, comprising:

[0006] A support base fixed to the ground;

[0007] The middle section is pivotally mounted on the top of the support base via a transversely arranged horizontal axis; and

[0008] A balance adjustment device is disposed on the rocker arm for matching and adjusting the weight at both ends of the rocker arm, the balance adjustment device comprising:

[0009] A counterweight bar that is slidably disposed at one end of the rocker arm and extends a predetermined length along the length direction of the rocker arm;

[0010] A rack fixed to the counterweight and extending along the length of the counterweight;

[0011] A gear pivotally mounted on the rocker arm at a predetermined position and meshing with the rack;

[0012] A locking device disposed on the rocker arm and used to lock the counterweight bar when the counterweight bar is moved into place; and

[0013] A drive handle for driving the gear to rotate.

[0014] Furthermore, the rocker arm is a hollow tube with a through hole at a predetermined position on one side of the tube wall. The counterweight, rack, and gear are all assembled inside the hollow cavity of the rocker arm. The drive handle is placed outside the rocker arm and one end extends into the hollow cavity through the through hole and is coaxially connected to the gear.

[0015] Furthermore, the rocker arm is also provided with a plurality of support rollers located at the bottom of the counterweight bar to support and guide the sliding of the counterweight bar, and a plurality of guide rollers located on opposite sides of the counterweight bar to guide the sliding of the counterweight bar.

[0016] Furthermore, the two opposite ends of the sliding stroke of the counterweight bar correspond to the following: the end of the counterweight bar away from the horizontal axis is located at the end of the rocker arm away from the horizontal axis, and the counterweight bar spans across both sides of the horizontal axis and is symmetrically distributed relative to the horizontal axis.

[0017] Furthermore, the drive handle is a crank or a turntable.

[0018] Furthermore, the support base includes:

[0019] A base fixed to the ground, wherein at least a portion of the outer surface of the base is cylindrical, and the cylindrical surface is provided with guide grooves that extend circumferentially in a sinusoidal wave shape and form a closed ring with their ends joined together; and

[0020] A mounting base is pivotally mounted at the top of the base and can rotate bidirectionally in the horizontal plane relative to the base; the rocker arm is correspondingly pivotally mounted at the top of the mounting base.

[0021] The seesaw also includes:

[0022] A linkage rod, the top end of which is pivotally connected to the bottom surface of the rocker arm near the mounting base, and the bottom end extending to the outside of the guide groove; the bottom end of the linkage rod also protrudes outward from the side facing the guide groove to form a guide slider that is placed within the guide groove and can slide along the guide groove; and

[0023] An anti-detachment structure is provided to prevent the guide slider from detaching from the guide groove.

[0024] Furthermore, the anti-detachment structure is a limiting sleeve disposed on one side of the mounting base, and the middle section of the connecting rod is correspondingly inserted into the limiting sleeve. The inner diameter of the limiting sleeve is larger than the outer diameter of the connecting rod, thereby providing space for the connecting rod to deflect and swing accordingly when the rocker arm moves.

[0025] Furthermore, the guide groove is a narrow-mouthed groove with a wide inner opening. The guide slider includes a round shaft portion whose outer diameter matches the width of the guide groove opening, and a stop portion that protrudes radially from the end of the round shaft portion and is correspondingly placed inside the guide groove. The stop portion and the guide groove cooperate to form the anti-detachment structure.

[0026] Furthermore, the anti-reverse part is a roller assembled at the end of the round shaft part.

[0027] Furthermore, the base includes a seat body and an outer sleeve correspondingly fitted onto the top of the seat body and fixed relative to the seat body. The side of the seat body is provided with a step that is higher on the outside and lower on the inside, and the high and low surfaces of the step extend in a wavy shape in the circumferential direction. The inner diameter of the outer sleeve is larger than the outer diameter of the section of the seat body located above the step, and the bottom surface of the sleeve wall extends in a wavy shape in the circumferential direction and matches the waveform of the high surface of the step. The bottom surface of the sleeve wall and the high surface of the step cooperate with each other to form the groove of the guide groove.

[0028] After adopting the above technical solution, the present utility model embodiment has at least the following beneficial effects: In this embodiment, by setting a balance adjustment device, the gear drives the rack by operating the drive handle, thereby driving the counterweight bar to slide to a suitable position in the length direction of the rocker arm, so as to better match the weight of the players sitting at both ends of the rocker arm, so that the weight loaded on both ends of the rocker arm will not be too different, which is conducive to the rocker arm swinging up and down more smoothly. The whole adjustment operation is very simple and labor-saving. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an optional embodiment of the seesaw of this utility model.

[0030] Figure 2 This is a schematic diagram of the internal structure of the seesaw rod in another optional embodiment of the seesaw of this utility model.

[0031] Figure 3 This is a schematic diagram illustrating the structural principle of the locking mechanism for the counterweight strip in one optional embodiment of the seesaw of this utility model.

[0032] Figure 4 This is a partially enlarged schematic diagram of an optional embodiment of the seesaw of the present invention in a disassembled state.

[0033] Figure 5 This is a partial cross-sectional view of an optional embodiment of the seesaw of this utility model. Detailed Implementation

[0034] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present utility model and are not intended to limit the present utility model. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0035] like Figures 1-3 As shown, an optional embodiment of this utility model provides a seesaw, comprising:

[0036] Support base 1 fixed to the ground;

[0037] The middle section is pivotally mounted on the top of the support base via a transversely arranged horizontal axis 30; and

[0038] A balance adjustment device 6 is disposed on the rocker arm 3 for matching and adjusting the weight at both ends of the rocker arm 3. The balance adjustment device 6 includes:

[0039] A counterweight bar 60 is slidably disposed at one end of the rocker arm 3 and extends a predetermined length along the length direction of the rocker arm;

[0040] A rack 62 fixed to the counterweight 60 and extending along the length of the counterweight 60;

[0041] A gear 64 pivotally mounted on the rocker arm 3 at a predetermined position and meshing with the rack 62;

[0042] A locking fastener 65 is provided on the rocker arm 3 and is used to lock the counterweight 60 when it moves into place; and

[0043] A drive handle 66 for driving the gear 64 to rotate.

[0044] This embodiment incorporates a balance adjustment device 6. By operating the drive handle 66, the gear 64 drives the rack 62, which in turn drives the counterweight 60 to slide along the length of the rocker arm 3 to a suitable position. This better matches the weight of the players sitting at both ends of the rocker arm 3, ensuring that the weight distribution at both ends is not too different, thus facilitating smoother up-and-down movement of the rocker arm 3. The entire adjustment operation is very simple and effortless. It is understood that the counterweight 60 is typically made of a high-density material, such as iron, copper, or concrete.

[0045] In specific implementation, the locking fastener 65 can be a bolt screwed onto the side wall of the rocker arm 3, with its inner end abutting against the side wall of the counterweight 60. When the position of the counterweight 60 needs to be adjusted, loosening the bolt applies force to the counterweight 60, causing it to move along the length of the rocker arm 3. Once the counterweight 60 is adjusted to the correct position, the bolt is tightened so that its inner end presses firmly against the side wall of the counterweight 60, thus preventing unnecessary displacement of the counterweight 60 when the rocker arm 3 swings up and down. Alternatively, other structural forms of the locking fastener 65 can be used, such as: a locking screw extending laterally from the counterweight 60, a corresponding groove on the rocker arm 3 for the locking screw to pass through, and a nut screwed onto the rod extending from the groove. Tightening the nut presses against the outer wall of the rocker arm 3, and the locking screw pulls the counterweight 60 to fix it. It is understood that in such cases... Figure 3 In the illustrated embodiment, when the counterweight 60 is placed inside the rocker arm 3, the locking fasteners 65 are typically symmetrically arranged on the side walls of opposite sides of the rocker arm 3 to press against the counterweight 60 from both sides, thereby balancing the force on the counterweight 60. Furthermore, depending on the weight of the counterweight 60 and considering the adjustment range of the counterweight 60's position, multiple sets of locking fasteners 65 can be arranged along the length of the rocker arm 3, so that no matter where the counterweight 60 moves, at least one set of locking fasteners 65 can effectively lock the counterweight 60.

[0046] In another embodiment of this utility model, such as Figure 2 As shown, the rocker arm 3 is a hollow tube with a through hole 32 at a predetermined position on one side of the tube wall 31. The counterweight 60, rack 62, and gear 64 are all assembled inside the hollow cavity 34 of the rocker arm 3. The drive handle 66 is placed outside the rocker arm 3, with one end extending into the hollow cavity 34 through the through hole 32 and coaxially connected to the gear 64. In this embodiment, by designing the rocker arm 3 as a hollow tube, most of the components of the balance adjustment device 6 are assembled inside the hollow cavity 34 of the rocker arm 3, thus achieving effective shielding and protection, and preventing injury to the player from the moving parts. It is understood that the rocker arm 3 can be formed by welding multiple plates or by integral molding. Figure 4 The example shown is a rocker arm 3 formed by welding plates together.

[0047] In yet another embodiment of this utility model, such as Figure 2 As shown, the rocker arm 3 is also provided with a plurality of support rollers 67 located at the bottom of the counterweight bar 60 to support and guide the sliding of the counterweight bar 60, and a plurality of guide rollers 69 located on opposite sides of the counterweight bar 60 to guide the sliding of the counterweight bar 60. In this embodiment, by adding support rollers 67 and guide rollers 69, the sliding of the counterweight bar 60 can be made smoother, and balance adjustment can be achieved with less effort.

[0048] In yet another embodiment of this utility model, such as Figure 2 As shown, the two opposite ends of the sliding stroke of the counterweight bar 60 correspond to the following: one end of the counterweight bar 60 away from the horizontal axis 30 is located at the other end of the rocker arm 3 away from the horizontal axis 30, and the other end of the counterweight bar 60 spans across both sides of the horizontal axis 30 and is symmetrically distributed relative to the horizontal axis 30. This embodiment maximizes the counterweight adjustment range of the counterweight bar 60 by rationally designing the sliding stroke of the counterweight bar 60. Figure 2 The diagram shows the state where the end of the counterweight bar 60 furthest from the horizontal axis 30 is located at one end of the rocker arm 3 furthest from the horizontal axis 30. In this position, the entire counterweight bar 60 is located at the end of the rocker arm 3 furthest from the horizontal axis 30, and the entire weight is loaded on this end of the rocker arm 3. This configuration is typically suitable when the player sitting at this end is significantly lighter than the player sitting at the other end. In a practical implementation, the length of the counterweight bar 60 can be designed to be one-third the length of the rocker arm 3, and the gear 66 is pivotally mounted at one-third the length of the rocker arm 3.

[0049] In another embodiment of this utility model, the drive handle is a crank or a turntable. This embodiment provides various structural forms of the drive handle 66, allowing for flexible selection based on specific implementation requirements. Figure 1 and Figure 2 In the embodiment shown, the drive handle 66 is a crank. By making good use of the crank's lever arm, the gear 64 can be driven to rotate more easily.

[0050] In yet another embodiment of this utility model, such as Figures 1 to 4 As shown, the support base 1 includes:

[0051] A base 10 fixed to the ground, at least a portion of the outer surface of the base 10 being a cylindrical surface 100, wherein the cylindrical surface 100 is provided with guide grooves 102 extending circumferentially in a sinusoidal wave shape and forming a closed ring; and

[0052] A mounting base 12 is pivotally mounted at the top of the base 10 and can rotate bidirectionally in the horizontal plane relative to the base 10; the rocker arm 3 is correspondingly pivotally mounted at the top of the mounting base 12.

[0053] The seesaw also includes:

[0054] Linkage rod 4, the top end of which is pivotally connected to the bottom surface of the rocker arm 3 near the mounting base 12, and the bottom end extending to the outside of the guide groove 102, and the bottom end of the linkage rod 4 also protruding from the side facing the guide groove 102 to form a guide slider 40 corresponding to and slidable within the guide groove 102; and

[0055] The anti-detachment structure 5 is used to prevent the guide slider 40 from detaching from the guide groove 102.

[0056] This embodiment of the invention designs the support base 1 as a base 10 and a mounting base 12 that can rotate bidirectionally in the horizontal plane relative to the base. A guide groove 102 extending circumferentially in a sinusoidal wave shape is provided on the cylindrical surface 100 outside the base 10. A connecting rod 4 is pivotally connected to the bottom surface of the rocker arm 3. A guide slider 40 at the bottom end of the connecting rod 4 is correspondingly positioned in the guide groove 102. Therefore, when the player applies force to rotate the rocker arm 4 along with the mounting base 12 in the horizontal plane relative to the base 10, the connecting rod 4… The guide slider 40 at the bottom slides along the guide groove 102, which in turn pushes the connecting rod 4 and the rocker arm 3 to move up and down synchronously. When the player applies force to make the rocker arm 3 swing up and down, the rocker arm 3 will also drive the guide slider 40 to rise and fall through the connecting rod 4. Since the base 10 is fixed to the ground and does not rotate, the guide groove 102 forces the guide slider 40 to slide circumferentially along the guide groove 102, which in turn drives the rocker arm 3 and the mounting base 12 to rotate left and right relative to the base 10. Thus, the superposition of the dual motions of up-and-down swinging and circumferential rotation can always be achieved, making it more interesting. In addition, the guide slider 4 slides in the sinusoidal guide groove 102, which can better control the speed of left and right rotation and improve safety.

[0057] In practice, the mounting base 12 can be pivotally connected to the base 10 by means of a ball joint or a vertical shaft with the central axis set vertically.

[0058] In another embodiment of this utility model, such as Figures 1 to 4As shown, the anti-detachment structure 5 is a limiting sleeve disposed on one side of the mounting base 12. The middle section of the connecting rod 4 passes through the limiting sleeve. The inner diameter of the limiting sleeve is larger than the outer diameter of the connecting rod 4, providing space for the connecting rod 4 to swing obliquely when it moves with the rocker arm 3. In this embodiment, by setting a limiting sleeve on one side of the mounting base 12 as the anti-detachment structure 5, and passing the middle section of the connecting rod 4 through the limiting sleeve, the radial movement of the connecting rod 4 can be effectively restricted, thereby preventing the guide slider 40 at its bottom end from detaching from the guide groove 102. Since the top end of the connecting rod 4 is pivotally connected to the bottom surface of the rocker arm 3, when it moves up and down with the rocker arm 3, the connecting rod 4 will swing obliquely relative to the central axis of the limiting sleeve. Therefore, by appropriately increasing the inner diameter of the limiting sleeve, the oblique swing of the connecting rod 4 can be facilitated.

[0059] In yet another embodiment of this utility model, such as Figure 5 As shown, the guide groove 102 is a narrow-mouthed groove with a wide inner surface. The guide slider 40 includes a round shaft portion 400 with an outer diameter adapted to the width of the guide groove 102, and a stop portion 402 that protrudes radially from the end of the round shaft portion 400 and is correspondingly placed inside the guide groove 102. The stop portion 402 cooperates with the guide groove 102 to form the anti-detachment structure 5. In this embodiment, the guide groove 102 is designed as a narrow-mouthed groove, and the guide slider 40 extends into the guide groove 102 through the opening of the round shaft portion 400. The stop portion 402, which protrudes radially from the end of the round shaft portion 400, abuts against the inner wall of the groove to prevent the guide slider 40 from detaching from the guide groove 102. In specific implementations, the round shaft portion 400 and the stop portion can be arranged in a T-shape or an L-shape. Figure 3 In the illustrated embodiment, the two are arranged in a T-shape.

[0060] In another embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the anti-reverse part 402 is a roller assembled at the end of the round shaft part 400. In this embodiment, by setting the anti-reverse part 402 as a roller, the roller can press against the groove wall of the guide groove 102 and roll accordingly, which can reduce frictional resistance and allow the rocker arm 3 to rotate smoothly left and right, and also reduce component wear.

[0061] In another embodiment of this utility model, such as Figure 5As shown, the base 10 includes a seat body 101 and an outer sleeve 103 correspondingly sleeved on the top of the seat body 101 and fixed relative to the seat body 11. The side of the seat body 101 is provided with a step 105 with an outer higher and inner lower. The higher surface 1050 and the lower surface 1052 of the step 105 both extend in a sinusoidal wave shape in the circumferential direction. The inner diameter of the outer sleeve 103 is larger than the outer diameter of the section of the seat body 101 located above the step 105. The bottom surface 1030 of the tube wall of the outer sleeve 103 extends in a sinusoidal wave shape in the circumferential direction and matches the waveform of the higher surface 1050 of the step 105. The bottom surface 1030 of the tube wall and the higher surface 1050 of the step 105 cooperate with each other to form the groove of the guide groove 102. In this embodiment, the base 10 is designed as a split structure formed by the corresponding seat body 101 and outer sleeve 103, which facilitates the placement of the guide slider 40 into the guide groove 102 during assembly.

[0062] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many variations under the guidance of the present invention without departing from the spirit and scope of the claims. All of these variations fall within the scope of protection of the present invention.

Claims

1. A seesaw, comprising: A support base fixed to the ground; The middle section is pivotally mounted on the top of the support base by means of a horizontally arranged transverse axis; as well as A balance adjustment device is installed on the rocker arm to match and adjust the weight at both ends of the rocker arm; The characteristic feature is that the balance adjustment device comprises: A counterweight bar that is slidably disposed at one end of the rocker arm and extends a predetermined length along the length direction of the rocker arm; A rack fixed to the counterweight and extending along the length of the counterweight; A gear pivotally mounted on the rocker arm at a predetermined position and meshing with the rack; A locking device disposed on the rocker arm and used to lock the counterweight bar when the counterweight bar is moved into place; and A drive handle for driving the gear to rotate.

2. The seesaw as described in claim 1, characterized in that, The rocker arm is a hollow tube with a through hole at a predetermined position on one side of the tube wall. The counterweight, rack, and gear are all assembled inside the hollow cavity of the rocker arm. The drive handle is placed outside the rocker arm and one end extends into the hollow cavity through the through hole and is coaxially connected to the gear.

3. The seesaw as described in claim 1 or 2, characterized in that, The rocker arm is also provided with several support rollers located at the bottom of the counterweight bar to support and guide the sliding of the counterweight bar, and several guide rollers located on opposite sides of the counterweight bar to guide the sliding of the counterweight bar.

4. The seesaw as described in claim 1, characterized in that, The two ends of the sliding stroke of the counterweight bar correspond to the end of the counterweight bar away from the horizontal axis located at the end of the rocker arm away from the horizontal axis, and the counterweight bar spanning across the two sides of the horizontal axis and symmetrically distributed relative to the horizontal axis.

5. The seesaw as described in claim 1, characterized in that, The drive handle is a crank or a turntable.

6. The seesaw as described in claim 1, characterized in that, The support base includes: A base fixed to the ground, wherein at least a portion of the outer surface of the base is cylindrical, and the cylindrical surface is provided with guide grooves that extend circumferentially in a sinusoidal wave shape and form a closed ring with their ends joined together; and A mounting base is pivotally mounted at the top of the base and can rotate bidirectionally in the horizontal plane relative to the base; the rocker arm is correspondingly pivotally mounted at the top of the mounting base. The seesaw also includes: A linkage rod, the top end of which is pivotally connected to the bottom surface of the rocker arm near the mounting base, and the bottom end extending to the outside of the guide groove; the bottom end of the linkage rod also protrudes outward from the side facing the guide groove to form a guide slider that is placed within the guide groove and can slide along the guide groove; and An anti-detachment structure is provided to prevent the guide slider from detaching from the guide groove.

7. The seesaw as described in claim 6, characterized in that, The anti-detachment structure is a limiting sleeve set on one side of the mounting base. The middle section of the connecting rod passes through the limiting sleeve. The inner diameter of the limiting sleeve is larger than the outer diameter of the connecting rod, so as to provide space for the connecting rod to swing accordingly when it moves with the rocker arm.

8. The seesaw as described in claim 6, characterized in that, The guide groove is a narrow-mouthed groove with a wide inner opening. The guide slider includes a round shaft portion whose outer diameter matches the width of the guide groove opening, and a stop portion that protrudes radially from the end of the round shaft portion and is correspondingly placed inside the guide groove. The stop portion and the guide groove cooperate to form the anti-detachment structure.

9. The seesaw as described in claim 8, characterized in that, The anti-reverse part is a roller assembled at the end of the round shaft part.

10. The seesaw as described in claim 8, characterized in that, The base includes a seat body and an outer sleeve correspondingly fitted onto the top of the seat body and fixed relative to the seat body. The side of the seat body is provided with a step that is higher on the outside and lower on the inside. The higher and lower surfaces of the step extend in a wavy shape in the circumferential direction. The inner diameter of the outer sleeve is larger than the outer diameter of the section of the seat body located above the step. The bottom surface of the sleeve wall extends in a wavy shape in the circumferential direction and matches the waveform of the higher surface of the step. The bottom surface of the sleeve wall and the higher surface of the step cooperate with each other to form the groove of the guide groove.

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