single bar on the door

Abstract

The application discloses a door single bar, which comprises a bar body, a first supporting leg and a second supporting leg, the bar body comprises a handle pipe and a sleeve pipe arranged in the handle pipe and synchronously rotating with the handle pipe, the two ends of the sleeve pipe are respectively connected with a first transmission nut and a second transmission nut, and the door single bar further comprises a first screw rod and a second screw rod, the first screw rod is in threaded connection with the first transmission nut, and the second screw rod is in threaded connection with the second transmission nut; a synchronous pipe is arranged in the sleeve pipe and sleeved on the first screw rod and the second screw rod, the synchronous pipe is circumferentially rotatable relative to the sleeve pipe, and the synchronous pipe is circumferentially limited relative to the first screw rod and the second screw rod; a left telescopic pipe is gap-fitted in the handle pipe and connected with the outer end of the first screw rod at an inner end, and a right telescopic pipe is gap-fitted in the handle pipe and connected with the outer end of the second screw rod at an inner end. The door single bar has the advantages of short installation time, fast installation speed and good user experience.

Description

Technical Field

[0001] This invention relates to the field of fitness equipment technology, specifically to a door-mounted horizontal bar. Background Technology

[0002] A door-mounted pull-up bar is a common indoor fitness equipment, mainly used for pull-up exercises installed on a door frame. Due to its small size and ease of installation, it is popular among fitness enthusiasts. The existing door-mounted pull-up bar structure includes a bar body and support legs connected to both ends of the bar body. The bar body includes left and right telescopic tubes, handle tubes, and a screw with threads on both sides. One end of the left telescopic tube is threaded to one side of the screw, and the other end is connected to the left support leg. One end of the right telescopic tube is threaded to the other side of the screw, and the other end is connected to the right support leg. When the handle tube rotates, it drives the screw to rotate, allowing the left and right telescopic tubes to extend outwards until the two support legs are pressed firmly against the inner walls of the door frame. To prevent the pull-up bar from falling off the door due to the reversing of the handle tube under torque, a locking mechanism is installed between the handle tube and the telescopic tube when the user is doing pull-ups. This locking mechanism usually uses a locking tooth to lock the handle tube and the telescopic tube, and the locking is released when the locking tooth disengages.

[0003] The existing door-mounted horizontal bar technology has the following shortcomings in practical use: The screw is threaded to the left and right telescopic tubes on both sides. When rotating the screw to unfold the horizontal bar, friction exists between the screw and the threaded connections of the left and right telescopic tubes. Under this friction, the left and right telescopic tubes rotate with the screw, preventing the horizontal bar from unfolding. Therefore, the screw must be rotated while restricting the circumferential rotation of the left and right telescopic tubes to unfold them. During installation, the unfolding of the left and right telescopic tubes often requires separate operations. One hand holds the left telescopic tube or left support leg, while the other hand rotates the handle to unfold it; then one hand holds the right telescopic tube or right support leg, while the other hand rotates the handle to unfold it. Therefore, unfolding or retracting the left and right telescopic tubes is cumbersome, resulting in long installation times, slow speed, and a poor user experience. Furthermore, due to the gap between the locking teeth and the locking mechanism, and the fact that the left and right support legs are prone to wear and aging, the single bar on the door is likely to become loosely connected to the door frame or even fall off after prolonged use, resulting in poor safety. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a door bar that has a short installation time, fast installation speed and good user experience.

[0005] The technical solution of the present invention is to provide a door-mounted horizontal bar with the following structure: it includes a bar body, a first support leg, and a second support leg, wherein the bar body includes...

[0006] The handle tube and the sleeve installed inside the handle tube and rotating synchronously with the handle tube, wherein the two ends of the sleeve are respectively connected to a first transmission nut and a second transmission nut;

[0007] Two lead screws with opposite thread directions: a first lead screw and a second lead screw. The first lead screw is axially slidably sleeved in a sleeve and is threadedly connected to a first transmission nut. The outer end of the first lead screw is located on the outside of the sleeve. The second lead screw is axially slidably sleeved in a sleeve and is threadedly connected to a second transmission nut. The outer end of the second lead screw is located on the outside of the sleeve.

[0008] A synchronizing tube is installed inside a sleeve and sleeved on a first lead screw and a second lead screw. The synchronizing tube can rotate circumferentially relative to the sleeve and is circumferentially limited relative to the first lead screw and the second lead screw.

[0009] The left telescopic tube is fitted with a clearance fit inside the handle tube and its inner end is connected to the outer end of the first lead screw. The outer end of the left telescopic tube is connected to the first support leg.

[0010] The right telescopic tube is fitted with a clearance inside the handle tube and its inner end is connected to the outer end of the second lead screw. The outer end of the right telescopic tube is connected to the second support leg.

[0011] Preferably, the synchronizing tube is a square tube with a square center hole, and the inner ends of the first lead screw and the second lead screw are each connected to a column head. The cross-section of the column head is adapted to the cross-section of the center hole of the synchronizing tube, so that the inner ends of the first lead screw and the second lead screw can slide axially within the center hole of the synchronizing tube.

[0012] Preferably, the inner end of the left telescopic tube is provided with an elongated hole extending along the axial direction of the left telescopic tube, and a first connecting member is fitted into the elongated hole with clearance, and the first connecting member is connected to the outer end of the first lead screw; the left telescopic tube is provided with an elastic member, one end of which is connected to the inner wall of the left telescopic tube, and the other end of which is connected to the outer end of the first lead screw. The elastic member is used to apply axial outward pressure to the left telescopic tube, so that the left telescopic tube always has an outward movement tendency.

[0013] Preferably, the inner end of the right telescopic tube is provided with a mounting hole, and a second connector is connected in the mounting hole. The second connector is connected to the outer end of the second lead screw.

[0014] Preferably, a first retainer is connected to the inner hole of the left telescopic tube, and the inner wall of the center hole of the first retainer is in clearance fit with the outer wall of the first lead screw; a second retainer is connected to the inner hole of the right telescopic tube, and the inner wall of the center hole of the second retainer is in clearance fit with the outer wall of the second lead screw.

[0015] Preferably, the first retainer is a first retaining nut, the second retainer is a second retaining nut, the first retaining nut is threadedly connected to the first lead screw, and the second retaining nut is threadedly connected to the second lead screw.

[0016] Preferably, a base is connected to the handle tube, and a level is connected to the base.

[0017] Preferably, both ends of the handle tube are connected to a locking mechanism. The locking mechanism includes a locking ring that slides along the length of the left or right telescopic tube and is circumferentially limited, and a locking seat connected to the end of the handle tube and rotating synchronously with the handle tube. The inner wall of the locking ring is provided with locking teeth, and the outer wall of the locking seat near the end of the locking ring is provided with locking teeth that can be engaged by the locking teeth.

[0018] With the above structure, the door-mounted horizontal bar of the present invention has the following advantages compared with the prior art: the left telescopic tube of the door-mounted horizontal bar is connected to the first lead screw, and the right telescopic tube is connected to the second lead screw, so the left telescopic tube moves synchronously with the first lead screw, and the right telescopic tube moves synchronously with the second lead screw; the door-mounted horizontal bar has a synchronizing tube set inside the sleeve, which is sleeved on the first and second lead screws, and the synchronizing tube can rotate circumferentially relative to the sleeve, and the synchronizing tube is circumferentially limited relative to the first and second lead screws; therefore, when the left telescopic tube or the right telescopic tube is gripped, the left telescopic tube and the right telescopic tube move synchronously. The circumferential rotation of both the first and second lead screws is restricted. At this time, rotating the handle tube causes the first and second transmission nuts to rotate circumferentially along the first and second lead screws respectively, allowing the first and second lead screws to simultaneously extend or retract along the axial direction of the synchronizing tube. Therefore, during installation of the gate's single bar, one only needs to hold the left or right telescopic tube with one hand and rotate the handle tube with the other to simultaneously extend the left or right telescopic tube; alternatively, holding the handle tube with one hand and rotating the left or right telescopic tube with the other will also simultaneously extend the left or right telescopic tube. Therefore, the gate's single bar has a short installation time, fast installation speed, and a good user experience.

[0019] Secondly, the synchronizing tube is a square tube with a square center hole, and the cross-section of the column head matches the cross-section of the center hole of the synchronizing tube. In this way, the first lead screw and the second lead screw can slide axially in the center hole of the synchronizing tube. Moreover, when the first lead screw rotates, the second lead screw can rotate synchronously through the synchronizing tube. When rotating the left or right telescopic tube, under the action of the first and second transmission nuts, the first and second lead screws can be synchronously extended or retracted axially in the center hole of the synchronizing tube.

[0020] Furthermore, due to the elongated hole on the left telescopic tube, there is an axial clearance between the first lead screw and the left telescopic tube. The elastic element ensures that the left telescopic tube always has an outward tendency, keeping the first and second support legs in close contact with the door frame. Even if the two support legs wear out or age, the elastic force of the elastic element will ensure that the first and second support legs are tightly fitted to the inner wall of the door frame. Moreover, the axial force exerted by the elastic element on the first lead screw makes the threaded engagement between the first transmission nut and the first lead screw even tighter, further preventing the handle tube from rotating in the opposite direction. The single bar on the door is firmly and stably connected to the door frame, and is not easy to fall off, thus ensuring good safety.

[0021] Furthermore, the locking mechanism at both ends of the handle tube utilizes the locking teeth on the locking ring to engage or disengage with the locking teeth of the locking seat, thereby locking or unlocking the circumferential rotation of the handle tube relative to the left and right telescopic tubes. Specifically, when the locking teeth engage with the locking teeth, the handle tube is in a locked state, restricting its circumferential rotation relative to the left and right telescopic tubes; when the locking teeth disengage, the handle tube is in an unlocked state, allowing it to rotate circumferentially relative to the left and right telescopic tubes to adjust their extension / retraction length. This lever structure is simple, has a self-locking function, and is easy to operate, requiring only axial movement of the locking ring. Moreover, when the lever is extended, first disengaging the locking teeth from the locking ring, then holding the locking ring with one hand and rotating the locking seat with the other; or holding the locking seat with one hand and rotating the locking ring with the other, will simultaneously extend or retract the left and right telescopic tubes, making operation simple and convenient.

[0022] Another technical solution of the present invention is to provide a door-mounted horizontal bar with the following structure: it includes a bar body, a first support leg, and a second support leg, wherein the bar body includes...

[0023] The handle tube and the sleeve installed inside the handle tube and rotating synchronously with the handle tube, wherein the two ends of the sleeve are respectively connected to a first transmission nut and a second transmission nut;

[0024] Two lead screws with opposite thread directions: a first lead screw and a second lead screw. The first lead screw is axially slidably sleeved in a sleeve and is threadedly connected to a first transmission nut. The outer end of the first lead screw is located on the outside of the sleeve. The second lead screw is axially slidably sleeved in a sleeve and is threadedly connected to a second transmission nut. The outer end of the second lead screw is located on the outside of the sleeve.

[0025] A synchronizing tube is installed inside a sleeve and sleeved on a first lead screw and a second lead screw. The synchronizing tube can rotate circumferentially relative to the sleeve and is circumferentially limited relative to the first lead screw and the second lead screw.

[0026] The left telescopic tube is fitted with a clearance fit inside the handle tube. The inner end of the left telescopic tube is connected to the outer end of the first lead screw, and there is an axial play between the inner end of the left telescopic tube and the outer end of the first lead screw. The outer end of the left telescopic tube is connected to the first support leg.

[0027] The right telescopic tube is fitted with a clearance fit inside the handle tube. The inner end of the right telescopic tube is connected to the outer end of the second lead screw, and the outer end of the right telescopic tube is connected to the second support leg.

[0028] An elastic element, located inside the left telescopic tube, connects the left telescopic tube and the first lead screw. It is used to apply axial outward pressure to the left telescopic tube, so that the left telescopic tube always has an outward tendency to move.

[0029] Preferably, the inner end of the left telescopic tube is provided with an elongated hole extending axially, the outer end of the first lead screw is connected to a first connector, the first connector is slidably fitted in the elongated hole, one end of the elastic element is connected to the inner wall of the left telescopic tube, and the other end of the elastic element is connected to the outer end of the first lead screw.

[0030] With the above structure, the door-mounted horizontal bar of the present invention has the following advantages compared with the prior art: The synchronizing tube of the door-mounted horizontal bar is sleeved on the first and second lead screws. The synchronizing tube can rotate circumferentially relative to the sleeve, and is circumferentially limited relative to the first and second lead screws. Therefore, when the left or right telescopic tube is gripped, the circumferential rotation of the left and right telescopic tubes, the first and second lead screws is restricted. At this time, rotating the handle tube causes the first and second transmission nuts to rotate circumferentially along the first and second lead screws respectively, thereby allowing the first and second lead screws to simultaneously extend or retract along the axial direction of the synchronizing tube. Therefore, during installation, the door-mounted horizontal bar only requires one hand to grip the left or right telescopic tube while the other hand rotates the handle tube to simultaneously extend the left or right telescopic tube; or, one hand to grip the handle tube while the other hand rotates the left or right telescopic tube to simultaneously extend the left or right telescopic tube. Therefore, the door-mounted horizontal bar has a short installation time, fast installation speed, and a good user experience. In addition, there is an axial play between the inner end of the left telescopic tube and the outer end of the first lead screw, and the elastic element inside the left telescopic tube applies an axial outward pressure to the left telescopic tube, so that the left telescopic tube always has an outward movement tendency, and the first support foot and the second support foot are always in close contact with the door frame. In this way, even if the two support feet are worn or aged, the elastic force of the elastic element will make the first support foot and the second support foot fit tightly against the inner wall of the door frame, making the connection between the single bar on the door and the door frame more firm and stable, and less likely to fall off, thus ensuring good safety. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a single bar on a door according to the present invention.

[0032] Figure 2 This is a cross-sectional structural schematic diagram of a first embodiment of the single bar on the door of the present invention.

[0033] Figure 3 This is a partial cross-sectional structural schematic diagram of a first embodiment of the single bar on the door of the present invention.

[0034] Figure 4 This is a schematic diagram of the structure of the bar body in Embodiment 1 of the door bar of the present invention.

[0035] Figure 5 This is a schematic diagram of the locking mechanism of the single bar on the door of the present invention.

[0036] Figure 6 This is a partial cross-sectional structural schematic diagram of a first embodiment of the single bar on the door of the present invention.

[0037] Figure 7 This is a schematic diagram of the structure of the bar body in Embodiment 2 of the present invention.

[0038] As shown in the figure:

[0039] 1. Bar body; 100. Handle tube; 101. Sleeve; 102. Left telescopic tube; 103. Right telescopic tube; 104. Synchronizing tube; 105. First lead screw; 106. Second lead screw; 107. First transmission nut; 108. Second transmission nut; 109. First retainer; 110. Second retainer; 111. Elongated hole; 112. First connector; 113. Mounting hole; 114. Second connector; 115. Column head; 116. Guide groove; 117. Fixed column; 2. First support leg; 200. Second support leg; 3. Base; 300. Level; 4. Locking mechanism; 400. Locking ring; 401. Lock seat; 402. Clamping tooth; 403. Locking tooth; 404. Limiting block. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Example

[0041] See Figures 1-6As shown, this embodiment of the invention discloses a single bar for a door, the structure of which includes a bar body 1, a left telescopic tube 102, a right telescopic tube 103, a first support leg 2 and a second support leg 200, and two lead screws with opposite thread directions: a first lead screw 105 and a second lead screw 106. The bar body 1 includes a handle tube 100 and a sleeve 101 disposed inside the handle tube 100 and rotating synchronously with the handle tube 100. The two ends of the sleeve 101 are respectively connected to a first transmission nut 107 and a second transmission nut 108, that is, the first transmission nut 107 and the second transmission nut 108 are fixedly connected to the inner holes at both ends of the sleeve 101 and rotate synchronously with the sleeve 101. The thread direction of the first transmission nut 107 matches the first lead screw 105, and the thread direction of the second transmission nut 108 matches the second lead screw 106. The first lead screw 105 is slidably sleeved in the sleeve 101 along the axial direction, and the first lead screw 105 is threadedly connected to the first transmission nut 107. The outer end of the lever 105 is located outside the sleeve 101; the second lead screw 106 is axially slidably sleeved inside the sleeve 101, and the second lead screw 106 is threadedly connected to the second transmission nut 108, with the outer end of the second lead screw 106 located outside the sleeve 101; the lever body 1 of the single lever on the door also includes a synchronization tube 104, which is clearance-fitted inside the sleeve 101 and sleeved on the first lead screw 105 and the second lead screw 106, and the synchronization tube 104 is configured relative to... The sleeve 101 is circumferentially rotatable, and the synchronizing tube 104 is circumferentially limited relative to the first lead screw 105 and the second lead screw 106; the left telescopic tube 102 is fitted with the handle tube 100 with clearance and its inner end is connected to the outer end of the first lead screw 105, and the outer end of the left telescopic tube 102 is connected to the first support leg 2; the right telescopic tube 103 is fitted with the handle tube 100 with clearance and its inner end is connected to the outer end of the second lead screw 106, and the outer end of the right telescopic tube 103 is connected to the second support leg 200.

[0042] The left telescopic tube 102 of the single bar on the door is connected to the first lead screw 105, and the right telescopic tube 103 is connected to the second lead screw 106. Therefore, the left telescopic tube 102 moves synchronously with the first lead screw 105, and the right telescopic tube 103 moves synchronously with the second lead screw 106. The single bar on the door has a synchronizing tube 104 installed inside the sleeve 101. The synchronizing tube 104 is sleeved on the first lead screw 105 and the second lead screw 106. The synchronizing tube 104 can rotate circumferentially relative to the sleeve 101, and is circumferentially limited relative to the first lead screw 105 and the second lead screw 106. Therefore, when the left telescopic tube 102 or the right telescopic tube 103 is gripped, the circumferential rotation of the left telescopic tube 102, the right telescopic tube 103, the first lead screw 105, and the second lead screw 106 is restricted. At this time, rotating the handle tube 100 causes the first... The transmission nut 107 and the second transmission nut 108 rotate circumferentially along the first lead screw 105 and the second lead screw 106, respectively, so that the first lead screw 105 and the second lead screw 106 can simultaneously extend or retract along the axial direction of the synchronous tube 104. Therefore, when installing the single bar on the door, one only needs to hold the left telescopic tube 102 or the right telescopic tube 103 with one hand and rotate the handle tube 100 with the other hand to make the left telescopic tube 102 or the right telescopic tube 103 extend synchronously. Alternatively, one can hold the handle tube 100 with one hand and rotate the left telescopic tube 102 or the right telescopic tube 103 with the other hand to make the left telescopic tube 102 or the right telescopic tube 103 extend synchronously. There is no need to extend the left telescopic tube 102 first and then the right telescopic tube 103. Therefore, the installation of the single bar on the door is quick and efficient, and provides a good user experience.

[0043] See you again Figure 3 As shown, in this embodiment, the synchronizing tube 104 is a square tube with a square center hole. The inner ends of the first lead screw 105 and the second lead screw 106 are each connected to a post head 115. The cross-section of the post head 115 is adapted to the cross-section of the center hole of the synchronizing tube 104, allowing the inner ends of the first lead screw 105 and the second lead screw 106 to slide axially within the center hole of the synchronizing tube 104. Thus, when the first lead screw 105 rotates, the second lead screw 106 can rotate synchronously through the synchronizing tube 104. When the left telescopic tube 102 or the right telescopic tube 103 is rotated, under the action of the first transmission nut 107 and the second transmission nut 108, the first lead screw 105 and the second lead screw 106 can synchronously expand or contract axially within the center hole of the synchronizing tube 104.

[0044] See you again Figure 4As shown, in this embodiment, the outer end of the first lead screw 105 is connected to a first connector 112, and the inner end of the left telescopic tube 102 is provided with an elongated hole 111 extending along the axial direction of the left telescopic tube 102. The first connector 112 is slidably fitted in the elongated hole 111 to allow the left telescopic tube 102 to move axially relative to the first lead screw 105. An elastic element is provided inside the left telescopic tube 102, and one end of the elastic element is connected to a fixed post 117 on the inner wall of the left telescopic tube 102, and the other end of the elastic element is connected to the outer end of the first lead screw 105. The elastic element is used to apply an axial outward pressure to the left telescopic tube 102 so that the left telescopic tube 102 always has an outward movement tendency. The elongated hole 111 on the left telescopic tube 102 allows for an axial clearance between the first lead screw 105 and the left telescopic tube 102. The elastic element ensures that the left telescopic tube 102 always has an outward tendency, keeping the first support leg 2 and the second support leg 200 firmly against the door frame. Even if the two support legs wear out or age, the elastic force of the elastic element ensures that both the first support leg 2 and the second support leg 200 remain tightly against the inner wall of the door frame. Furthermore, the axial force exerted by the elastic element on the first lead screw 105 makes the threaded engagement between the first transmission nut 107 and the first lead screw 105 even tighter, further preventing reverse rotation of the handle tube. The single bar on the door is firmly and stably connected to the door frame, and is not easily detached, ensuring good safety. In this embodiment, the outer end of the second lead screw 106 is connected to a second connecting member 114, and the inner end of the right telescopic tube 103 has a mounting hole 113. The second connecting member 114 is connected within the mounting hole 113. Both the first connector 112 and the second connector 114 are connecting pins, but they can also be connecting screws, bolts, etc.

[0045] See you again Figure 2 and Figure 4 As shown, a first retainer 109 is connected to the inner hole of the left telescopic tube 102, and the inner wall of the central hole of the first retainer 109 is in clearance fit with the outer wall of the first lead screw 105; a second retainer 110 is connected to the inner hole of the right telescopic tube 103, and the inner wall of the central hole of the second retainer 110 is in clearance fit with the outer wall of the second lead screw 106. In this embodiment, the first retainer 109 is a first retaining nut, and the second retainer 110 is a second retaining nut. The first retaining nut is threadedly connected to the first lead screw 105, and the second retaining nut is threadedly connected to the second lead screw 106. Furthermore, the thread direction of the first retaining nut is the same as the thread direction of the first transmission nut, and the thread direction of the second retaining nut is the same as the thread direction of the second transmission nut.

[0046] See you again Figure 1As shown, a base 3 is connected to the handle tube, and a level 300 is connected to the base 3. The level 300 is a level 300 with liquid and air bubbles inside a vacuum tube. The position of the air bubbles is used to determine whether the lever 1 is level. This is existing technology and will not be described in detail in this embodiment.

[0047] See Figure 5 As shown, in this embodiment, both ends of the handle tube are connected to a locking mechanism 4. The locking mechanism 4 includes a locking ring 400 that slides along the length of the left telescopic tube 102 or the right telescopic tube 103 and is circumferentially limited, and a locking seat 401 that is connected to the end of the handle tube and rotates synchronously with the handle tube. The inner wall of the locking ring 400 is provided with a locking tooth 402, and the outer wall of the locking seat 401 near the end of the locking ring 400 is provided with a locking tooth 403 that can be engaged by the locking tooth 402. In this embodiment, the outer wall of either the left telescopic tube 102 or the right telescopic tube 103 is provided with an axially extending and concave guide groove 116, and the locking ring 400 is provided with a limiting block 404 that is clearance-fitted into the guide groove 116. This allows the locking ring 400 to slide along the length of the left telescopic tube 102 or the right telescopic tube 103 and be circumferentially limited. The locking mechanism 4 uses the locking teeth 402 on the locking ring 400 to engage or disengage with the locking teeth 403 of the locking seat 401 to allow the handle tube to engage with the left telescopic tube. The circumferential rotation between the retractable tube 102 and the right telescopic tube 103 is locked or unlocked. Specifically, when the locking tooth 402 engages with the locking tooth 403, the handle tube 100 is locked, and its circumferential rotation relative to the left telescopic tube 102 and right telescopic tube 103 is restricted. When the locking tooth 402 disengages from the locking tooth 403, the handle tube 100 is unlocked, and it can rotate circumferentially relative to the left telescopic tube 102 and right telescopic tube 103 to adjust the extension and retraction lengths of the two telescopic tubes. This lever body 1 has a simple structure, a self-locking function, and convenient self-locking operation; it only requires axial movement of the locking ring 400.

[0048] Example 2; see also Figure 7As shown, in this embodiment, the door bar includes a bar body 1, a first support leg 2, and a second support leg 200. The bar body 1 includes a handle tube 100 and a sleeve 101 disposed inside the handle tube 100 and rotating synchronously with the handle tube 100. The two ends of the sleeve 101 are respectively connected to a first transmission nut 107 and a second transmission nut 108; two lead screws with opposite thread directions: a first lead screw 105 and a second lead screw 106. The first lead screw 105 is axially slidably sleeved inside the sleeve 101, and the first lead screw 105 is threadedly connected to the first transmission nut 107, with its outer end located outside the sleeve 101; the second lead screw 106 is axially slidably sleeved inside the sleeve 101, and the second lead screw 106 is threadedly connected to the second transmission nut 108, with its outer end located outside the sleeve 101; a synchronizing tube 104 is disposed inside the sleeve 101 and sleeved between the first lead screw 105 and the second lead screw 106. On the second lead screw 106, the synchronizing tube 104 is circumferentially rotatable relative to the sleeve 101, and the synchronizing tube 104 is circumferentially limited relative to the first lead screw 105 and the second lead screw 106; the left telescopic tube 102 is clearance-fitted inside the handle tube 100, the inner end of the left telescopic tube 102 is connected to the outer end of the first lead screw 105, and there is an axial play between the inner end of the left telescopic tube 102 and the outer end of the first lead screw 105, and the outer end of the left telescopic tube 102 is connected to the first support leg 2; the right telescopic tube 103 is clearance-fitted inside the handle tube 100, the inner end of the right telescopic tube 103 is connected to the outer end of the second lead screw 106, and the outer end of the right telescopic tube 103 is connected to the second support leg 200; an elastic element is disposed inside the left telescopic tube 102, connecting the left telescopic tube 102 and the first lead screw 105, and is used to apply axial outward pressure to the left telescopic tube 102, so that the left telescopic tube 102 always has an outward movement tendency. The inner end of the left telescopic tube 102 is provided with an elongated hole 111 extending along the axial direction. The outer end of the first lead screw 105 is connected to a first connector 112. The first connector 112 is slidably fitted in the elongated hole 111. One end of the elastic member is connected to the inner wall of the left telescopic tube 102, and the other end of the elastic member is connected to the outer end of the first lead screw 105.

[0049] The synchronizing tube 104 of the single bar on the door is sleeved on the first lead screw 105 and the second lead screw 106. The synchronizing tube 104 can rotate circumferentially relative to the sleeve 101, and is circumferentially limited relative to the first lead screw 105 and the second lead screw 106. Therefore, when the left telescopic tube 102 or the right telescopic tube 103 is gripped, the circumferential rotation of the left telescopic tube 102, the right telescopic tube 103, the first lead screw 105, and the second lead screw 106 is restricted. At this time, rotating the handle tube 100 causes the first transmission nut 107 and the second transmission nut 108 to move along the first... The circumferential rotation of lead screw 105 and second lead screw 106 allows them to simultaneously extend or retract along the axial direction of synchronous tube 104. Therefore, during installation, the single bar on the door only requires one hand to hold the left telescopic tube 102 or right telescopic tube 103 while the other hand rotates the handle tube 100 to simultaneously extend the left telescopic tube 102 or right telescopic tube 103; alternatively, one hand can hold the handle tube 100 while the other hand rotates the left telescopic tube 102 or right telescopic tube 103 to simultaneously extend them. Thus, the single bar on the door allows the left telescopic tube 102 and right telescopic tube 103 to extend or retract simultaneously, resulting in short installation time, fast installation speed, and a good user experience. Furthermore, there is an axial play between the inner end of the left telescopic tube 102 and the outer end of the first lead screw 105, and the elastic element inside the left telescopic tube 102 applies an axial outward pressure to the left telescopic tube 102, ensuring that the left telescopic tube 102 always has an outward tendency to move. This keeps the first support leg 2 and the second support leg 200 in close contact with the door frame. Even if the two support legs wear out or age, the elastic force of the elastic element ensures that the first support leg 2 and the second support leg 200 can remain tightly fitted to the inner wall of the door frame, making the connection between the door bar and the door frame more secure and stable, less prone to detachment, and providing good safety. Other technical solutions in this embodiment are the same as in Embodiment 1 above, and will not be described again in this embodiment.

[0050] In the accompanying drawings of this embodiment, the same reference numerals correspond to the same components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0051] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A door-mounted horizontal bar, comprising a bar body, a first support leg, and a second support leg, characterized in that: The lever body includes The handle tube and the sleeve installed inside the handle tube and rotating synchronously with the handle tube, wherein the two ends of the sleeve are respectively connected to a first transmission nut and a second transmission nut; Two lead screws with opposite thread directions: a first lead screw and a second lead screw. The first lead screw is axially slidably sleeved in a sleeve and is threadedly connected to a first transmission nut. The outer end of the first lead screw is located on the outside of the sleeve. The second lead screw is axially slidably sleeved in a sleeve and is threadedly connected to a second transmission nut. The outer end of the second lead screw is located on the outside of the sleeve. A synchronizing tube is installed inside a sleeve and sleeved on a first lead screw and a second lead screw. The synchronizing tube can rotate circumferentially relative to the sleeve and is circumferentially limited relative to the first lead screw and the second lead screw. The left telescopic tube is fitted with a clearance fit inside the handle tube and its inner end is connected to the outer end of the first lead screw. The outer end of the left telescopic tube is connected to the first support leg. The right telescopic tube is fitted with a clearance inside the handle tube and its inner end is connected to the outer end of the second lead screw. The outer end of the right telescopic tube is connected to the second support leg.

2. The single bar on the door according to claim 1, characterized in that: The synchronizing tube is a square tube with a square center hole. The inner ends of the first and second lead screws are each connected to a post. The cross-section of the post is adapted to the cross-section of the center hole of the synchronizing tube, so that the inner ends of the first and second lead screws can slide axially within the center hole of the synchronizing tube.

3. The single bar on the door according to claim 1, characterized in that: The outer end of the first lead screw is connected to a first connector. The inner end of the left telescopic tube is provided with an elongated hole extending along the axial direction of the left telescopic tube. The first connector is slidably fitted in the elongated hole to allow the left telescopic tube to have an axial clearance relative to the first lead screw. The left telescopic tube is provided with an elastic element, one end of which is connected to the inner wall of the left telescopic tube, and the other end of which is connected to the outer end of the first lead screw. The elastic element is used to apply an axial outward pressure to the left telescopic tube, so that the left telescopic tube always has an outward movement tendency.

4. The single bar on the door according to claim 3, characterized in that: The outer end of the second lead screw is connected to a second connector, and the inner end of the right telescopic tube is provided with a mounting hole, and the second connector is connected in the mounting hole.

5. The single bar on the door according to claim 1, characterized in that: A first retainer is connected to the inner hole of the left telescopic tube, and the inner wall of the center hole of the first retainer is in clearance fit with the outer wall of the first lead screw; a second retainer is connected to the inner hole of the right telescopic tube, and the inner wall of the center hole of the second retainer is in clearance fit with the outer wall of the second lead screw.

6. The single bar on the door according to claim 5, characterized in that: The first retainer is a first retaining nut, the second retainer is a second retaining nut, the first retaining nut is threadedly connected to the first lead screw, and the second retaining nut is threadedly connected to the second lead screw.

7. The single bar on the door according to claim 1, characterized in that: A base is connected to the handle tube, and a level is connected to the base.

8. The single bar on the door according to claim 1, characterized in that: Both ends of the handle tube are connected to a locking mechanism. The locking mechanism includes a locking ring that slides along the length of the left or right telescopic tube and is circumferentially limited, and a locking seat connected to the end of the handle tube and rotating synchronously with the handle tube. The inner wall of the locking ring is provided with locking teeth, and the outer wall of the locking seat near the end of the locking ring is provided with locking teeth that can be engaged by the locking teeth.

9. A door-mounted horizontal bar, comprising a bar body, a first support leg, and a second support leg, characterized in that: The lever body includes The handle tube and the sleeve installed inside the handle tube and rotating synchronously with the handle tube, wherein the two ends of the sleeve are respectively connected to a first transmission nut and a second transmission nut; Two lead screws with opposite thread directions: a first lead screw and a second lead screw. The first lead screw is axially slidably sleeved in a sleeve and is threadedly connected to a first transmission nut. The outer end of the first lead screw is located on the outside of the sleeve. The second lead screw is axially slidably sleeved in a sleeve and is threadedly connected to a second transmission nut. The outer end of the second lead screw is located on the outside of the sleeve. A synchronizing tube is installed inside a sleeve and sleeved on a first lead screw and a second lead screw. The synchronizing tube can rotate circumferentially relative to the sleeve and is circumferentially limited relative to the first lead screw and the second lead screw. The left telescopic tube is fitted with a clearance fit inside the handle tube. The inner end of the left telescopic tube is connected to the outer end of the first lead screw, and there is an axial play between the inner end of the left telescopic tube and the outer end of the first lead screw. The outer end of the left telescopic tube is connected to the first support leg. The right telescopic tube is fitted with a clearance fit inside the handle tube. The inner end of the right telescopic tube is connected to the outer end of the second lead screw, and the outer end of the right telescopic tube is connected to the second support leg. An elastic element, located inside the left telescopic tube, connects the left telescopic tube and the first lead screw. It is used to apply axial outward pressure to the left telescopic tube, so that the left telescopic tube always has an outward tendency to move.

10. The single bar on the door according to claim 9, characterized in that: The inner end of the left telescopic tube is provided with an elongated hole extending along the axial direction. The outer end of the first lead screw is connected to a first connector. The first connector is slidably fitted in the elongated hole. One end of the elastic element is connected to the inner wall of the left telescopic tube, and the other end of the elastic element is connected to the outer end of the first lead screw.

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