A safe horizontal bar on the door

Abstract

The present invention belongs to the technical field of horizontal bars on doors, and particularly relates to a horizontal bar on doors that is simple in structure and safe in use, comprising an intermediate rod and a telescopic rod sleeved on the intermediate rod, the telescopic rod being rotatable and telescopic relative to the intermediate rod, a tightening device being arranged on the telescopic rod, the tightening device comprising a mounting seat, a connecting rod and a fixing seat, the mounting seat being connected to the telescopic rod, two ends of the connecting rod being hinged to the mounting seat and the fixing seat respectively, a limiting block being arranged on the connecting rod, a locking block being slidably arranged on the limiting block, a sliding groove being arranged on the locking block, a limiting groove being arranged at least at one end of the sliding groove, the limiting groove comprising an upper limit surface and a lower limit surface, the limiting block swinging between the upper limit surface and the lower limit surface, the lower limit surface preventing the fixing seat from moving downward, and the upper limit surface preventing the mounting seat from moving downward, during installation, the locking block slides downward under the action of gravity, the limiting block slides into the limiting groove, and in a fixed state, a hinge axis 1 between the mounting seat and the connecting rod is higher than or equal to a hinge axis 2 between the fixing seat and the connecting rod.

Description

Technical Field

[0001] The invention belongs to the technical field of horizontal bars on doors, and in particular relates to a safe horizontal bar on a door. Background Art

[0002] The door-mounted horizontal bar is a common indoor fitness equipment, mainly used for installation on the door frame for pull-up exercises. Because of its small size and convenient installation and fixing, it is loved by many fitness enthusiasts. The door-mounted horizontal bar of the prior art is mainly fixed by the left and right telescopic rods and the middle screw rod rotating forward and backward to extend and squeeze the door frame to generate friction. Although it plays a fixing role during installation, during use, because the hand will hold the middle screw rod, the middle screw rod will cause the left and right telescopic rods to expand and contract during the up and down movement. In the current locking state, it is very likely to be loosened due to squeezing during use, and the door-mounted horizontal bar will fall off, causing safety hazards.

[0003] In order to prevent the horizontal bar from loosening and falling off the door frame, the prior art directly uses accessories such as lock pins to insert and fix it circumferentially to prevent rotation. Although this can achieve anti-rotation, the user needs to insert and fix it again during installation, and the user often forgets this step; Chinese utility patent CN206688076U discloses a double-axis horizontal bar, the connecting seat and the fixing seat of the horizontal bar form a parallelogram structure through two upper and lower tensioning connectors, and the parallelogram is used to achieve thrust extrusion of the door frame, but such a structure is relatively complicated, and the user needs to manually adjust the angle between the fixing seat and the connecting seat during installation before it can be used safely. Therefore, the market is in urgent need of a simple, practical and safe horizontal bar for doors. Summary of the invention

[0004] In order to overcome the defects in the prior art, the object of the present invention is to provide a door horizontal bar with simple structure and safe use.

[0005] The object of the present invention is achieved in that:

[0006] The locking block is configured to lock the locking cam of the locking cam and the locking cam of the locking cam, wherein the locking block is configured to lock the locking cam of the locking cam and the locking cam of the locking cam.

[0007] It is further configured that: limit grooves are provided at both upper and lower ends of the sliding groove.

[0008] It is further configured as follows: an arc surface one is provided at the end of the limit groove, an upper limit surface and a lower limit surface are provided on both sides of the arc surface one, and an arc surface two is provided at the end of the limit block to match the arc surface one, and the arc surface one and the arc surface two are arranged concentrically.

[0009] It is further configured as follows: abutment surface one and abutment surface two are provided on the limit block; when abutment surface one abuts against the upper limit surface, the height of hinge axis one between the mounting seat and the connecting rod is equal to the height of hinge axis two between the fixed seat and the connecting rod; when abutment surface two abuts against the lower limit surface, the height of hinge axis one between the mounting seat and the connecting rod is higher than the height of hinge axis two between the fixed seat and the connecting rod.

[0010] It is further configured as follows: at least two connecting rods are provided between the mounting seat and the fixing seat.

[0011] It is further configured as follows: a sliding groove is longitudinally arranged on the fixing seat, and the locking block is adapted to the sliding groove and slides longitudinally in the sliding groove.

[0012] It is further configured as follows: the locking block is in a "C" shape.

[0013] It is further configured that: an elastic component is abutted between the mounting seat and the fixing seat to keep the two open.

[0014] It is further configured as follows: the mounting seat and the fixing seat are both provided on the shell, and the connecting rod is hinged on both sides of the shell.

[0015] It is further configured that: in a fixed state, a height of a first hinge axis between the mounting seat and the connecting rod is higher than a height of a second hinge axis between the fixing seat and the connecting rod, and an end surface of the mounting seat abuts against an end surface of the fixing seat.

[0016] The beneficial effects of the present invention relative to the prior art are:

[0017] , the connecting rod is fixed to the mounting seat and the fixed seat through the cooperation of the locking block and the limit block, so that the connecting rod, the mounting seat and the fixed seat form an "N" shape, so that the horizontal bar on the door is subjected to the action of gravity, and the fixed seats on the left and right sides generate thrust to the door frame and squeeze the door frame more and more tightly, avoiding the fixing seat and the door frame from falling off. The structure is simple, and the user does not need to adjust it manually. The operation is simple and convenient.

[0018] 2. By arranging limit grooves at both ends, it is possible to realize that when the horizontal bar is installed, either end can fall downward under the action of gravity to lock the limit block. This further facilitates the operation of the user. There is no need to consider whether the installation angle is accurate during installation, and there will be no problem of failure to lock due to incorrect installation angle, thereby improving the safety of use.

[0019] , through the setting of arc surface one and arc surface two, it is convenient for the locking block to swing in the limit groove, making the movement smoother and convenient for squeezing and locking.

[0020] , the mounting seat and the fixing seat are kept in an open state by setting the elastic component, so that it is convenient for the locking block to slide up and down under the action of gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a partial structural cross-sectional view of the locking block of the present invention when it is not locked;

[0023] Figure 3 It is a partial structural cross-sectional view of the present invention when the limit block is pressed against the lower limit surface;

[0024] Figure 4 It is a partial structural cross-sectional view of the present invention when the limit block is pressed against the upper limit surface;

[0025] Figure 5 It is an exploded schematic diagram of the structure of the abutting device of the present invention;

[0026] Figure 6 It is a cross-sectional view of the locking block of the present invention.

[0027] Meaning of the symbols in the figure:

[0028] 1-middle rod; 2-telescopic rod; 3-mounting seat; 4-connecting rod; 5-limiting block; 51-abutment surface 1;

[0029] 52-abutting surface 2; 53-arc-shaped surface 2; 6-fixed seat; 61-slide groove; 7-locking block; 71-slide groove;

[0030] 72-limiting groove; 73-arc surface 1; 74-upper limit surface; 75-lower limit surface; 81-hinge axis 1;

[0031] 82- hinged axis 2; 9- elastic component. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to specific embodiments of the present invention:

[0033] See also Figures 1 to 6 As shown, a safe horizontal bar on a door comprises an intermediate rod 1 and a telescopic rod 2 sleeved on the intermediate rod 1. The telescopic rod 2 is retracted and rotated relative to the intermediate rod 1, such as the manual screw and nut rotation and retraction on the market, or the electric screw drives the nut to rotate, that is, a screw is arranged on the intermediate rod 1, and a nut is arranged on the telescopic rod 2, and the screw drives the nut to move laterally. This telescopic structure is a prior art and will not be explained in detail here. The telescopic rod 2 and the middle rod 1 form a horizontal bar, and the outer ends of the telescopic rod 2 and the middle rod 1 are both provided with a tightening device, or the telescopic rod 2 can be respectively located at the two ends of the middle rod 1, and the telescopic rods 2 at both ends are provided with a tightening device; in this embodiment, it is preferred that the telescopic rod 2 is respectively located at the two ends of the middle rod 1, and the tightening device includes a mounting seat 3, a connecting rod 4 and a fixed seat 6, the mounting seat 3 is connected to the telescopic rod 2, and the two ends of the connecting rod 4 are respectively hinged to the mounting seat 3 and the fixed seat 6, a limiting block 5 is provided on the connecting rod 4, a locking block 7 is slidably provided on the limiting block 5, a sliding groove 71 is provided on the locking block 7, and a limiting groove 72 is provided at least at one end of the sliding groove 71, and the limiting groove 72 includes an upper limit surface 74 and a lower limit surface 75, and the limiting block 5 is at the upper limit surface 74 and the lower limit surface 75. The locking block 7 and the limit block 5 are used to swing between the fixing seat 6 and the mounting seat 3, and the lower limit surface 75 prevents the fixing seat 6 from moving downward, and the upper limit surface 74 prevents the mounting seat 3 from moving downward. During installation, the locking block 7 slides downward under the action of gravity, and the limit block 5 slides into the limit groove 72. In the fixed state, the height of the hinge axis 1 81 of the mounting seat 3 and the connecting rod 4 is higher than or equal to the height of the hinge axis 2 82 of the fixing seat 6 and the connecting rod 4; the locking block 7 and the limit block 5 cooperate with each other to realize the fixing of the mounting seat 3 and the fixing seat 6 by the connecting rod 4, so that the connecting rod 4, the mounting seat 3 and the fixing seat 6 form an "N" shape, so that the horizontal bar on the door is subjected to the action of gravity, and the fixing seats 6 on the left and right sides generate thrust to the door frame and are squeezed tighter and tighter with the door frame, so as to avoid the fixing seat 6 and the door frame from falling off. The structure is simple, and the user does not need to adjust it manually, and the operation is simple and convenient.

[0034] The upper and lower ends of the sliding groove 71 are both provided with limiting grooves 72; in this way, by providing the limiting grooves 72 at the upper and lower ends, the locking block 7 can fall downward under the action of gravity at either end of the horizontal bar during the installation process to lock the limiting block 5. This further facilitates the operation of the user, and there is no need to consider whether the installation angle is accurate during installation, that is, there is no need to consider whether the fixing seat 6 is in the installation position during installation, and there will be no problem of failure to lock due to an incorrect installation angle, thereby improving the safety and convenience of use.

[0035] In order to facilitate the locking block 7 to swing in the limit groove 72 and make the movement smoother, and also to facilitate the extrusion and locking of the fixing seat 6 by the mounting seat 3, in this embodiment, the limit block 5 is coaxially arranged with the hinge shaft 2 82, and the end of the limit groove 72 is provided with an arc surface 1 73, and the two sides of the arc surface 1 73 are respectively provided with an upper limit surface 74 and a lower limit surface 75, and the end of the limit block 5 is provided with an arc surface 2 53 adapted to the arc surface 1 73, and the arc surface 1 73 and the arc surface 2 53 are coaxially arranged.

[0036] The limit block 5 is provided with an abutting surface 1 51 and an abutting surface 2 52. When the abutting surface 1 51 abuts against the upper limit surface 74, the height of the hinge axis 1 81 between the mounting seat 3 and the connecting rod 4 is equal to the height of the hinge axis 2 82 between the fixing seat 6 and the connecting rod 4. At this time, the length of the connecting rod 4 extending between the mounting seat 3 and the fixing seat 6 is the longest. If the mounting seat 3 moves downward again, the distance between the mounting seat 3 and the fixing seat 6 will become shorter, and then the fixing effect of the abutment will be lost. Therefore, this abutting surface 1 51 is the critical point of the safety distance in this embodiment. In this state, during the installation process, the telescopic rod 2 needs to be further pressed toward the door frame to move the mounting seat 3 upward, forming an "N" shape between the connecting rod 4, the mounting seat 3 and the fixed seat 6. When the abutting surface 52 abuts against the lower limit surface 75, the height of the hinge axis 1 81 between the mounting seat 3 and the connecting rod 4 is higher than the height of the hinge axis 2 82 between the fixed seat 6 and the connecting rod 4. At this time, an "N" shape is formed between the connecting rod 4, the mounting seat 3 and the fixed seat 6, and the horizontal bar is subjected to the downward force of the user, and the fixed seat 6 will abut against the door frame more tightly.

[0037] At least two connecting rods 4 are arranged between the mounting seat 3 and the fixing seat 6; in the present embodiment, although one connecting rod 4 can achieve the effect of tightening and preventing falling off, the manufacturer can set different numbers of connecting rods 4 according to the models of different horizontal bars. Two connecting rods 4 can be arranged in the middle part between the mounting seat 3 and the fixing seat 6, or three connecting rods 4 can be arranged in the upper, middle and lower parts between the mounting seat 3 and the fixing seat 6 according to the needs. Multiple connecting rods 4 can increase the stability of the product in the abutting state.

[0038] A slide groove 61 is longitudinally arranged on the fixing seat 6, and the locking block 7 is adapted to the slide groove 61 and slides longitudinally in the slide groove 61. By setting the locking block 7 to slide in the slide groove 61, the longitudinal reciprocating movement of the locking block 7 can be realized, and the lateral separation of the locking block 7 and the limit block 5 can be avoided, thereby making full use of the space in the mounting seat 3 and making the structure more compact.

[0039] In this embodiment, the locking block 7 is in a "C" shape, and the "C"-shaped opening can allow the limit block 5 to pass through and be stuck in the "C"-shaped cavity and slide up and down in the cavity; the locking block 7 can also be set through the middle as needed, and then the limit block 5 can be passed through the middle of this locking block 7 to achieve a sliding setting. In this embodiment, the locking block 7 is preferably in a "C" shape.

[0040] In order to keep the mounting seat 3 and the fixing seat 6 in an open state, an elastic component 9 is abutted between the mounting seat 3 and the fixing seat 6 to keep the two open, which facilitates the locking block 7 to slide up and down under the action of gravity. The elastic component 9 in this embodiment is preferably a spring, and in order to keep the mounting seat 3 and the fixing seat 6 parallel, elastic components 9 are respectively provided at the upper and lower ends of the mounting seat 3 and the fixing seat 6, and the locking block 7 is arranged in the space area between the two elastic components 9, which makes the locking block 7 slide more smoothly.

[0041] In order to make the structure more concealed and prevent the locking block 7 from being interfered with by other external substances, the mounting seat 3 and the fixing seat 6 are both provided with a shell, and the connecting rod 4 is hinged on both sides of the shell, so that the locking block 7 is surrounded by the shell, which also increases the overall aesthetics of the product.

[0042] In the fixed state, the height of the hinge axis 1 81 between the mounting seat 3 and the connecting rod 4 is higher than the height of the hinge axis 2 82 between the fixing seat 6 and the connecting rod 4, and the end face of the mounting seat 3 abuts against the end face of the fixing seat 6. At this time, when the user pulls down to do pull-ups, the mounting seat 3 will have a certain downward swinging force driven by the user's gravity, and this downward swinging trend will drive the connecting rod 4 to swing downward, and the mounting seat 3 and the fixing seat 6 will be driven to separate by the connecting rod 4, and at the same time, the fixing seat 6 is squeezed inward by the connecting rod 4 and the pressure becomes tighter and tighter.

[0043] During actual use, after the user suspends the horizontal bar in the air, the fixing seat 6 naturally droops under the action of gravity, and the locking block 7 slides downward into the limiting groove 72 at the upper end. The user rotates the middle rod 1 to extend the telescopic rod 2 outward, and the fixing seat 6 abuts against the door frame and then continues to rotate the middle rod 1, so that the telescopic rod 2 drives the mounting seat 3 to be squeezed inward, and the mounting seat 3 drives the connecting rod 4 to continue to be squeezed toward the fixing seat 6. In the fixed state, an "N" shape is formed between the connecting rod 4, the mounting seat 3 and the fixing seat 6. In the use state, the middle rod 1 tends to be pressed downward by the weight of the human body, and the connecting rod 4 will squeeze the fixing seat 6 towards the door frame. At this time, the fixation of the horizontal bar will be more secure.

[0044] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A safe horizontal door bar, comprising an intermediate rod (1) and a telescopic rod (2) sleeved on the intermediate rod (1), the telescopic rod (2) being rotatable and telescopic relative to the intermediate rod (1), the telescopic rod (2) being provided with a tightening device, characterized in that: The clamping device comprises a mounting seat (3), a connecting rod (4) and a fixing seat (6); the mounting seat (3) is connected to the telescopic rod (2); two ends of the connecting rod (4) are respectively hinged to the mounting seat (3) and the fixing seat (6); a limit block (5) is provided on the connecting rod (4); a locking block (7) is slidably provided on the limit block (5); a sliding groove (71) is provided on the locking block (7); a limit groove (72) is provided at at least one end of the sliding groove (71); the limit groove (72) comprises an upper limit surface (74) and a lower limit surface (75); The locking block (7) is provided on the upper surface (75), the limiting block (5) swings between the upper limit surface (74) and the lower limit surface (75), the lower limit surface (75) prevents the fixing seat (6) from moving downward, and the upper limit surface (74) prevents the mounting seat (3) from moving downward. During installation, the locking block (7) slides downward under the action of gravity, and the limiting block (5) slides into the limiting groove (72). In the fixed state, the height of the hinge axis 1 (81) between the mounting seat (3) and the connecting rod (4) is higher than or equal to the height of the hinge axis 2 (82) between the fixing seat (6) and the connecting rod (4); Limiting grooves (72) are provided at both upper and lower ends of the sliding groove (71); Three connecting rods (4) are respectively arranged at the upper, middle and lower parts between the mounting seat (3) and the fixing seat (6); The fixing seat (6) naturally droops under the action of gravity, the locking block (7) slides downward to allow the limit block (5) to enter the limit groove (72) at the upper end, and the user rotates the middle rod (1) to allow the telescopic rod (2) to extend outward. After the fixing seat (6) contacts the door frame, the middle rod (1) is further rotated to allow the telescopic rod (2) to drive the mounting seat (3) to be pressed inward, and the mounting seat (3) drives the connecting rod (4) to continue to be pressed toward the fixing seat (6). In the fixed state, an "N" shape is formed between the connecting rod (4), the mounting seat (3) and the fixing seat (6). In the use state, the middle rod (1) tends to be pressed downward by the weight of the human body, and the connecting rod (4) will press the fixing seat (6) toward the door frame. At this time, the fixing of the horizontal bar will be more firmly secured.

2. A safe door horizontal bar according to claim 1, characterized in that: The end of the limit groove (72) is provided with an arc surface 1 (73), and the two sides of the arc surface 1 (73) are respectively provided with an upper limit surface (74) and a lower limit surface (75), and the end of the limit block (5) is provided with an arc surface 2 (53) adapted to the arc surface 1 (73), and the arc surface 1 (73) and the arc surface 2 (53) are arranged cocentrically.

3. A safe door horizontal bar according to claim 2, characterized in that: The limit block (5) is provided with a first abutment surface (51) and a second abutment surface (52). When the first abutment surface (51) abuts against the upper limit surface (74), the height of the first hinge axis (81) between the mounting seat (3) and the connecting rod (4) is equal to the height of the second hinge axis (82) between the fixed seat (6) and the connecting rod (4). When the second abutment surface (52) abuts against the lower limit surface (75), the height of the first hinge axis (81) between the mounting seat (3) and the connecting rod (4) is higher than the height of the second hinge axis (82) between the fixed seat (6) and the connecting rod (4).

4. A safe door horizontal bar according to claim 1, 2 or 3, characterized in that: A sliding groove (61) is longitudinally arranged on the fixing seat (6), and the locking block (7) is adapted to the sliding groove (61) and slides longitudinally in the sliding groove (61).

5. A safe door horizontal bar according to claim 4, characterized in that: The locking block (7) is in a "C" shape.

6. A safe door horizontal bar according to claim 1, 2 or 5, characterized in that: An elastic component (9) is abutted between the mounting seat (3) and the fixing seat (6) to keep the two members open.

7. A safe door horizontal bar according to claim 6, characterized in that: The mounting seat (3) and the fixing seat (6) are both provided on the shell, and the connecting rod (4) is hinged on both sides of the shell.

8. A safe door horizontal bar according to claim 7, characterized in that: In the fixed state, the height of the first hinge axis (81) between the mounting seat (3) and the connecting rod (4) is higher than the height of the second hinge axis (82) between the fixing seat (6) and the connecting rod (4), and the end surface of the mounting seat (3) abuts against the end surface of the fixing seat (6).

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