Door frame mounted pull-up device

Abstract

According to one embodiment of the present invention, there is provided a door frame-mounted suspension device, which includes a first gripping bar including a first screw rod having a first screw thread spiraled in a first helical direction on an outer circumferential surface thereof, a first gripping bar in which the first screw rod is longitudinally received, and a first adapter coupled to an end of the first gripping bar and fixing the first screw rod to the first gripping bar in the form of a free end; a second screw rod having a second screw thread spiraled in a second helical direction opposite to the first helical direction on an outer circumferential surface thereof, and a second gripping bar in which the second screw rod is longitudinally received, and a first adapter coupled to an end of the second gripping bar and fixing the second screw rod to the second gripping bar. The door frame includes a second gripping bar that includes a second adapter fixed in the shape of a free end and is arranged symmetrically to the first gripping bar, and a support bar that is interposed between the first gripping bar and the second gripping bar and has both ends respectively housed inside the first gripping bar and the second gripping bar, and has a first nut block attached to an inner peripheral surface of one side housed inside the first gripping bar and a second nut block attached to an inner peripheral surface of the other side housed inside the second gripping bar, and as the support bar rotates, the first gripping bar and the second gripping bar move in the longitudinal direction of the support bar to adhere to or separate from the door frame.

Description

[Technical Field]

[0001] The present invention relates to a door frame-mounted pull-up bar, and more particularly to a door frame-mounted pull-up bar that can be easily gripped by a user because the gripping portion is exposed at a constant length even when the length is adjusted to fit the width of the door frame. [Background technology]

[0002] Since the COVID-19 pandemic, interest in health has increased, and interest in "home fitness" (a portmanteau of "home" and "fitness"), which involves exercising indoors at home without being affected by fine particulate matter or weather, has been on the rise. Pull-up equipment, which can be easily attached to a door frame, has been gaining attention. Simply hanging from a pull-up can help improve grip strength, improve overall balance, and improve posture. Pull-ups are also effective in strengthening the muscles in the arms, back, and shoulders, and depending on your posture, can also strengthen your core muscles, making them a full-body workout.

[0003] Conventional door frame-mounted pull-up devices have a structure in which grip bars inserted into both ends of a central rod protrude and are fixed to the door frame. To accommodate the insertion of the grip bars, the diameter of the central rod is large and the diameter of the grip bars is small. This requires the user to grip the grip bars tightly, and when the door frame is narrow and the protruding length of the grip bars is short, the user's hands can hit the length adjustment nuts on the central rod or the fixing caps on the grip bars, creating an inconvenience. In particular, when gripping the central rod to avoid hitting the nuts or fixing caps, the user can only grip it at a position narrower than shoulder width, which not only causes inconvenience in use but also reduces the exercise effect.

[0004] To solve these problems, there is a need for a suspension device that can be easily gripped by the user, with the grip portion exposed at a constant length even when the length is adjusted to fit the width of the door frame. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Korean Patent No. 10-1833668 (February 22, 2018) Summary of the Invention [Problem to be solved by the invention]

[0006] The technical problem to be solved by the present invention is to provide a door frame-mounted suspension device that can be easily gripped by a user by adjusting the length to fit the width of the door frame and exposing the grip part at a constant length.

[0007] The technical problems of the present invention are not limited to those described above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0008] A door frame-mounted suspension device according to an embodiment of the present invention for achieving the above technical object includes a first gripping bar including a first screw rod having a first screw thread spiraled in a first spiral direction on an outer circumferential surface thereof, a first gripping bar in which the first screw rod is longitudinally received, and a first adapter coupled to an end of the first gripping bar and fixing the first screw rod to the first gripping bar in the form of a free end; a second screw rod having a second screw thread spiraled in a second spiral direction opposite to the first spiral direction on an outer circumferential surface thereof, and a second gripping bar in which the second screw rod is longitudinally received, and a first adapter coupled to an end of the second gripping bar and fixing the second screw rod to the a second gripping bar disposed symmetrically to the first gripping bar, the second adapter being fixed to the second gripping bar in the form of a free end; and a support bar interposed between the first gripping bar and the second gripping bar, with both ends accommodated within the first gripping bar and the second gripping bar, the support bar having a first nut block attached to an inner peripheral surface of one side housed within the first gripping bar and a second nut block attached to an inner peripheral surface of the other side housed within the second gripping bar, the first gripping bar and the second gripping bar moving in the longitudinal direction of the support bar as the support bar rotates to come into contact with or separate from the door frame.

[0009] The first gripping rod and the second gripping rod are circular rods having the same diameter, and the support rod may be formed in a circular rod shape whose outer surface is in close contact with the inner surfaces of the first gripping rod and the second gripping rod.

[0010] The length of the support bar exposed between the first gripping bar and the second gripping bar may be shorter than the lengths of the first gripping bar and the second gripping bar.

[0011] The door frame-mounted suspension device may further include a handle tube tightly fixed to the center of the support bar so as to surround the outer periphery of the support bar.

[0012] The handle tube may be formed to have a length longer than the total length of the support rods exposed to the outside.

[0013] The handle tube may have an outer diameter larger than the outer diameters of the first and second grip bars.

[0014] The door frame-mounted suspension device may further include a first fixing pin that diametrically penetrates and fixes the first adapter and the first screw rod, and a second fixing pin that diametrically penetrates and fixes the second adapter and the second screw rod.

[0015] The door frame-mounted suspension device may further include a first fixing cap and a second fixing cap that are respectively coupled to the outside of the first adapter and the second adapter and are in close contact with the door frame, and the first fixing cap and the second fixing cap may have eccentric recessed grooves formed at their upper portions into which the first adapter and the second adapter are respectively inserted. [Effects of the Invention]

[0016] According to the present invention, because both ends of the central support bar are housed within the first and second grip bars, respectively, the grip portion is always exposed at a constant length even when the length is adjusted to fit the width of the door frame. Therefore, users do not need to grip the support bar narrower than shoulder width, and because the diameters of the first and second grip bars are larger than conventional ones, they can be held without a strong grip, making it easy for users of various builds to hold and exercise. In particular, because the support bar, which is threadedly connected to the first and second grip bars, cannot be gripped, unintentional rotation of the support bar can be prevented, and the suspension apparatus can be prevented from coming off the door frame due to changes in length caused by movement of the first and second grip bars. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a diagram showing a state in which a door frame-mounted suspension device according to an embodiment of the present invention is used. [Figure 2]FIG. 1 is an exploded perspective view of a door frame-mounted suspension device. [Figure 3] FIG. 3 is a cross-sectional view showing the door frame-mounted suspension device of FIG. 2 cut in the vertical direction. [Figure 4] FIG. 1 is an enlarged cross-sectional view of a portion of a door frame-mounted suspension device. [Figure 5] 10 is an operational diagram for explaining the operation of the door frame-mounted suspension device. FIG. [Figure 6] 10 is an operational diagram for explaining the operation of the door frame-mounted suspension device. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] The advantages and features of the present invention, as well as methods for achieving them, will become clearer with reference to the following detailed embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and can be realized in various different forms. The present embodiments are provided solely to complete the disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art to which the present invention pertains. The present invention is defined solely by the scope of the claims. The same reference symbols refer to the same elements throughout the specification.

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A door frame-mounted suspension device according to an embodiment of the present invention will be described in detail below with reference to FIGS.

[0020] FIG. 1 is a diagram showing a state in which a door frame-mounted suspension device according to an embodiment of the present invention is used.

[0021] In the door frame-mounted pull-up device 1 according to an embodiment of the present invention, both ends of the central support bar (see 30 in FIG. 2 ) are housed within the first grip bar (see 12 in FIG. 2 ) and the second grip bar (see 22 in FIG. 2 ), respectively. This allows the grip portion to be exposed at a constant length even when the length is adjusted to fit the width of the door frame F. Therefore, users do not need to grip the support bar 30 narrower than shoulder width, and the larger diameters of the first grip bar 12 and the second grip bar 22 allow for easy gripping and exercise, even for users of various builds. In particular, the fact that the first grip bar 12 and the second grip bar 22 are threadedly connected to the support bar 30 prevents unintentional rotation of the support bar 30. This prevents the pull-up device from coming off the door frame F due to changes in length caused by movement of the first grip bar 12 and the second grip bar 22.

[0022] The door frame-mounted suspension device 1 will be described in detail below with reference to FIGS. 2 to 4. FIG.

[0023] Figure 2 is an exploded perspective view of a door frame-mounted suspension device, Figure 3 is a cross-sectional view of the door frame-mounted suspension device of Figure 2 cut vertically, and Figure 4 is a cross-sectional view of an enlarged portion of the door frame-mounted suspension device.

[0024] The door frame mounted suspension device 1 according to the present invention includes a first gripping bar 10, a second gripping bar 20, and a support rod 30.

[0025] The first gripping bar 10 is one side portion that is gripped by the user, and includes a first screw rod 11, a first gripping rod 12, and a first adapter 13.

[0026] The first screw rod 11 is a rod-shaped metal material having a certain length, and has a first screw thread 11a spiraling in a first helical direction formed on its outer periphery. The first screw rod 11 is accommodated inside the first gripping rod 12. The first gripping rod 12 is a circular rod-shaped metal material having a hollow in the longitudinal direction, and the first screw rod 11 is accommodated inside the first gripping rod 12 in the longitudinal direction. The first screw rod 11 has a smaller diameter than the first gripping rod 12, so the first screw rod 11 and the first gripping rod 12 can be spaced apart. A tube (not shown) for improving grip and preventing slippage can be wound around the outer periphery of the first gripping rod 12, and the first screw rod 11 can be fixed to the first gripping rod 12 by a first adapter 13. The first adapter 13 fixes the first screw rod 11 to the first gripping rod 12 in the form of a free end and can be welded or bonded to the end of the first gripping rod 12 to support one side of the first screw rod 11. More specifically, the first screw rod 11 passes through the center of the first adapter 13, and the first adapter 13 and the first screw rod 11 may each have a through hole (no reference number) that passes through in the diameter direction of the first screw rod 11. The first adapter 13 and the first screw rod 11 may be fixed to each other by inserting a first fixing pin 15 into the overlapping through holes. The first fixing pin 15 is a cylindrical spring pin with a slit formed in the longitudinal direction. When inserted into the through hole, the slit spacing narrows to allow smooth insertion, and when inserted back into the through hole, the slit spacing returns to its original position, allowing for firm fixation. As the spring-shaped first fixing pin 15 passes through and fixes the first adapter 13 and the first screw rod 11, a gap is created between the first adapter 13 and the first screw rod 11, allowing the first screw rod 11 to be automatically centered within the first gripping rod 12. When the first adapter 13 and the first screw rod 11 are fixed by welding, if the first screw rod 11 is not maintained in an accurately horizontal position, it will not be centered within the first gripping rod 12, and the first screw rod 11 and the first nut block 31 described later may not be threaded together smoothly.In the present invention, the first fixing pin 15, which is in the form of a spring pin, fixes the first adapter 13 and the first screw rod 11 while simultaneously forming a clearance, thereby automatically centering the first screw rod 11 and facilitating the screw connection between the first screw rod 11 and the first nut block 31. A first fixing cap 14 is attached to the outside of the first adapter 13. The first fixing cap 14 is adapted to fit tightly against the door frame F, and a recessed groove 14a into which the first adapter 13 is inserted may be formed eccentrically at the top. The first fixing cap 14 may have an anti-slip pad (not shown) or unevenness on its outer surface that contacts the door frame F, allowing it to fit tightly against the door frame F without slipping. The first fixing cap 14 and the first adapter 13 are fixed to each other by a first connecting pin 16, which may be inserted through one side of the first fixing cap 14 and the first adapter 13.

[0027] The second gripping bar 20 is the other side portion that is gripped by the user, and includes a second screw rod 21, a second gripping rod 22, and a second adapter 23, and is arranged symmetrically with the first gripping bar 10.

[0028] The second screw rod 21 is a rod-shaped metal material having a certain length, and has a second screw thread 21a formed on its outer circumferential surface, the second screw thread 21a spiraling in a second helical direction opposite to the first helical direction. The second screw rod 21 is housed inside the second grip rod 22. The second grip rod 22 is a circular rod-shaped metal material that is hollow in the longitudinal direction and has the same diameter as the first grip rod 12, and the second screw rod 21 is housed inside the second grip rod 22 in the longitudinal direction. The second screw rod 21 has a smaller diameter than the second grip rod 22, so the second screw rod 21 and the second grip rod 22 can be spaced apart. A tube (not shown) can be wound around the outer circumferential surface of the second grip rod 22 to improve grip and prevent slipping, and the second screw rod 21 can be fixed to the second grip rod 22 by a second adapter 23. The second adapter 23 fixes the second screw rod 21 to the second holding rod 22 in the form of a free end and may be welded or bump-connected to the end of the second holding rod 22 to support one side of the second screw rod 21. More specifically, the second screw rod 21 passes through the center of the second adapter 23, and the second adapter 23 and the second screw rod 21 may each have a through hole (without reference numeral) passing through in the diameter direction of the second screw rod 21. The second adapter 23 and the second screw rod 21 may be fixed to each other by inserting a second fixing pin 25 into the overlapping through holes. The second fixing pin 25 is a cylindrical spring pin with slits formed in the longitudinal direction. When inserted into the through hole, the slits narrow to allow smooth insertion, and when inserted back into the through hole, the slits return to their original spacing to allow for firm fixation. The second fixing pin 25 in the form of a spring pin passes through and fixes the second adapter 23 and the second screw rod 21, creating a gap between the second adapter 23 and the second screw rod 21, allowing the second screw rod 21 to be automatically centered within the second gripping rod 22. When the second adapter 23 and the second screw rod 21 are fixed by welding, if the second screw rod 21 is not maintained in an accurate horizontal position, it will not be centered within the second gripping rod 22, which may prevent smooth screw coupling of the second screw rod 21 and the second nut block 32 (described later).In the present invention, the second fixing pin 25, which is in the form of a spring pin, fixes the second adapter 23 and the second screw rod 21 and simultaneously forms a clearance, thereby automatically centering the second screw rod 21 and facilitating the screw connection between the second screw rod 21 and the second nut block 32. A second fixing cap 24 is attached to the outside of the second adapter 23. The second fixing cap 24 is fitted closely to the door frame F, and a recessed groove 24a into which the second adapter 23 is inserted may be formed eccentrically at the top. Because the recessed grooves 14a, 24a of the first fixing cap 14 and the second fixing cap 24 are respectively formed eccentrically at the top, the load-bearing area at the bottom of the first adapter 13 and the second adapter 23 is increased, resulting in a more stable structure. The outer surface of the second fixing cap 24 that contacts the door frame F may be fitted with an anti-slip pad (no reference number) or have a concave / convex surface, allowing it to easily fit closely to the door frame F without slipping. The second fixing cap 24 and the second adapter 23 are fixed by a second connecting pin 26, which can be inserted through one side of the second fixing cap 24 and the second adapter 23.

[0029] A support rod 30 may be interposed between the first gripping bar 10 and the second gripping bar 20. The support rod 30 is a circular rod-shaped metal material that is hollow in the longitudinal direction and can accommodate the first screw rod 11 and the second screw rod 21 therein, with both ends accommodated in the first gripping bar 12 and the second gripping bar 22, respectively, and its outer circumferential surface may be in close contact with the inner circumferential surfaces of the first gripping bar 12 and the second gripping bar 22. A first nut block 31, to which the first screw rod 11 is screwed, is coupled to or formed integrally with the inner circumferential surface of one side of the support rod 30 that is accommodated in the first gripping bar 12, and a second nut block 32, to which the second screw rod 21 is screwed, is coupled to or formed integrally with the inner circumferential surface of the other side that is accommodated in the second gripping bar 22. Therefore, as the support rod 30 rotates, the first gripping bar 10 and the second gripping bar 20 move in the longitudinal direction of the support rod 30 and can be attached to or detached from the door frame F. For example, when the support rod 30 rotates in one direction, for example counterclockwise, the first gripping bar 10 and the second gripping bar 20 can move to the outside of the support rod 30 and be attached to the door frame F due to the threaded connection between the first screw rod 11 and the first nut block 31 and the second screw rod 21 and the second nut block 32. Conversely, when the support rod 30 rotates in the other direction, for example clockwise, the first gripping bar 10 and the second gripping bar 20 can move to the center of the support rod 30 and be detached from the door frame F due to the threaded connection between the first screw rod 11 and the first nut block 31 and the second screw rod 21 and the second nut block 32.

[0030] The length of the support rod 30 exposed between the first grip rod 12 and the second grip rod 22 may be formed to be shorter than the lengths of the first grip rod 12 and the second grip rod 22. By forming the length of the support rod 30 exposed between the first grip rod 12 and the second grip rod 22 to be shorter than the lengths of the first grip rod 12 and the second grip rod 22, the contact areas of the first grip rod 12 and the second grip rod 22 with the support rod 30 are increased, thereby preventing the first grip rod 12 and the second grip rod 22 from coming off the support rod 30. Furthermore, even if a user hangs by holding the first grip rod 12 and the second grip rod 22, the load is distributed to the first grip rod 12, the second grip rod 22 and the support rod 30, preventing structural deformation.

[0031] A handle tube 40 made of a urethane material may be wrapped around the center of the support rod 30, more specifically, the central outer circumferential surface exposed between the first grip rod 12 and the second grip rod 22, to improve grip and prevent slipping. The handle tube 40 may have an outer diameter larger than the outer diameters of the first grip rod 12 and the second grip rod 22, and may be tightly fixed around the central outer circumferential surface of the support rod 30. The length of the handle tube 40 may be longer than the total length of the support rod 30 exposed to the outside. By forming the length of the handle tube 40 longer than the total length of the support rod 30 exposed to the outside, it is possible to minimize direct contact between the user and the metal support rod 30, improving convenience and preventing discoloration and corrosion of the support rod 30 due to repeated contact with sweat, foreign objects, etc.

[0032] The operation of the door frame-mounted suspension device 1 will be described in more detail below with reference to FIGS.

[0033] 5 and 6 are operation diagrams for explaining the operation of the door frame-mounted suspension device.

[0034] The door frame-mounted suspension device 1 according to the present invention is configured so that both ends of the central support bar 30 are housed within the first and second grip bars 12 and 22, respectively. This allows the grip portion to be exposed at a constant length even when the length is adjusted to fit the width of the door frame F. Therefore, users do not need to grip the support bar 30 narrower than shoulder width, and the larger diameters of the first and second grip bars 12 and 22 allow for easy gripping without a strong grip, making it easy for users of various builds to hold and exercise. In particular, because the first and second grip bars 12 and 22 are threadedly connected to the support bar 30, unintentional rotation of the support bar 30 can be prevented, and the suspension device can be prevented from coming off the door frame F due to changes in length caused by movement of the first and second grip bars 12 and 22.

[0035] FIG. 5 is a diagram illustrating the operation of increasing the length of the door frame-mounted suspension device, and FIG. 6 is a diagram illustrating the operation of decreasing the length of the door frame-mounted suspension device.

[0036] 5, a user can rotate support rod 30 in one direction, for example, counterclockwise, to move first gripping bar 10 and second gripping bar 20 outward from support rod 30. More specifically, when support rod 30 is rotated counterclockwise, first screw rod 11 and second screw rod 21, which are threadedly coupled to first nut block 31 and second nut block 32, respectively, move outward from support rod 30. Accordingly, first gripping rod 12, which is secured to first screw rod 11 by first adapter 13, and second gripping rod 22, which is secured to second screw rod 21 by second adapter 23, also move outward from support rod 30. As first gripping rod 12 and second gripping rod 22 move outward from support rod 30, the overall length of the suspension apparatus increases, and first fixing cap 14 and second fixing cap 24, which are secured to first adapter 13 and second adapter 23, respectively, can be brought into close contact with door frame F.

[0037] 6 , the user can rotate support rod 30 in the other direction, for example, clockwise, to move first gripping bar 10 and second gripping bar 20 toward the center of support rod 30. More specifically, when support rod 30 is rotated clockwise, first screw rod 11 and second screw rod 21, which are threadedly coupled to first nut block 31 and second nut block 32, respectively, move toward the inside of support rod 30. Accordingly, first gripping rod 12, which is secured to first screw rod 11 by first adapter 13, and second gripping rod 22, which is secured to second screw rod 21 by second adapter 23, also move toward the center of support rod 30. When first gripping rod 12 and second gripping rod 22 move toward the center of support rod 30, the overall length of the suspension apparatus decreases, and first fixing cap 14 and second fixing cap 24, which are secured to first adapter 13 and second adapter 23, respectively, may detach from door frame F.

[0038] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art will understand that the present invention can be embodied in other specific forms without changing the technical spirit or essential characteristics thereof. Therefore, the above-described embodiments are merely illustrative in all respects and should not be construed as limiting. [Explanation of symbols]

[0039] 1 Door frame mounted pull-up device 10 First gripping bar 11 First screw rod 12 1st gripping rod 13 First adapter 14 First fixing cap 15 First fixing pin 16 First connecting pin 20 Second gripping bar 21 Second screw rod 22 Second gripping rod 23 Second Adapter 24 Second fixing cap 25 Second fixing pin 26 Second connecting pin 30 Support rod 31 First nut block 32 Second nut block 40 Handle tube Front door frame

Claims

1. a first screw rod having a first thread spiraling in a first helical direction on its outer circumferential surface; a first gripping bar having the first screw rod longitudinally housed therein; and a first adapter coupled to an end of the first gripping bar and fixing the first screw rod to the first gripping bar in the form of a free end; a second screw rod having a second thread on its outer circumferential surface, the second thread being helically formed in a second helical direction opposite to the first helical direction; a second gripping rod in which the second screw rod is longitudinally accommodated; and a second adapter coupled to an end of the second gripping rod and fixing the second screw rod to the second gripping rod in the form of a free end, the second gripping bar being disposed symmetrically with the first gripping bar; a support bar interposed between the first gripping bar and the second gripping bar, with both ends accommodated in the first gripping bar and the second gripping bar, and having a first nut block screwed onto the first screw rod and a second nut block screwed onto the second screw rod and attached to an inner peripheral surface of one side of the support bar accommodated in the first gripping bar, and As the support rod rotates, the first gripping bar and the second gripping bar move in the longitudinal direction of the support rod to adhere to or separate from the door frame.

2. The first gripping rod and the second gripping rod are circular rods having the same diameter, 2. The door frame-mounted suspension device according to claim 1, wherein the support rod is formed in a circular rod shape whose outer circumferential surface is in close contact with the inner circumferential surfaces of the first gripping rod and the second gripping rod.

3. 3. The door frame-mounted suspension device of claim 2, wherein the length of the support bar exposed between the first grip bar and the second grip bar is shorter than the length of the first grip bar and the second grip bar.

4. The door frame-mounted suspension device according to claim 2, further comprising a handle tube tightly fixed to the center of the support rod so as to surround the outer periphery of the support rod.

5. The door frame-mounted suspension device according to claim 4, wherein the length of the handle tube is longer than the total length of the support rods exposed to the outside.

6. 6. The door frame-mounted suspension device according to claim 5, wherein the handle tube has an outer diameter larger than the outer diameters of the first and second grip bars.

7. a first fixing pin that penetrates the first adapter and the first screw rod in a diametrical direction and fixes them; 2. The door frame mounted suspension device of claim 1, further comprising a second fixing pin diametrically passing through and fixing the second adapter and the second screw rod.

8. The door frame further includes a first fixing cap and a second fixing cap respectively coupled to the outer sides of the first adapter and the second adapter and tightly fitted to the door frame, 2. The door frame-mounted suspension device according to claim 1, wherein the first fixing cap and the second fixing cap have eccentric recessed grooves formed at their upper portions, into which the first adaptor and the second adaptor are respectively inserted.

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