A pedal self-locking mechanism

Abstract

The present invention discloses a pedal self-locking mechanism, comprising a pedal fixing seat, a rod fixing seat, a pedal rod and a locking rod, wherein the rod fixing seat is fixedly connected to the pedal fixing seat; the pedal rod is slidably connected to the pedal fixing seat and the rod fixing seat, and the pedal rod is connected to an unlocking rod; the locking rod is slidably connected within the pedal fixing seat and the rod fixing seat, a limited locking rod is provided on the locking rod, the limited locking rod is slidably provided on the rod fixing seat, the limited locking rod switches between the locked and unlocked positions of the rod fixing seat, the driving end of the unlocking rod is correspondingly provided with the end of the limited locking rod, and when the driving end of the unlocking rod drives the limited locking rod, the limited locking rod switches from the locked position of the rod fixing seat to the unlocked position, and the locking rod is connected to the pedal rod. In the pedal self-locking mechanism of the present invention, the locking and unlocking of the mechanism need to be driven by the same structural member of the pedal, the driving structure is more simplified, manual operation is not required, the operation is simple, and the use is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of self-locking devices, and in particular to a pedal self-locking mechanism. Background Art

[0002] Single-photon emission computed tomography (SPECT) is a commonly used clinical imaging device in nuclear medicine. It can be used to assess the function of organs such as the thyroid, kidneys, heart, brain, and lungs, as well as to diagnose related diseases. It also plays a significant role in the clinical diagnosis and staging of various malignant tumors. Compared to traditional gamma cameras, SPECT not only reveals the function and morphology of organs and tissues, allowing for a three-dimensional observation of changes in organs and diseases, but also displays this information through tomographic images in different directions.

[0003] When a SPECT device scans different organs, different types of collimators are needed. Collimators are generally made of lead or aluminum alloy. Therefore, the weight of a collimator is between 35kg and 135kg. It is heavy and difficult to lift and replace manually. Therefore, a collimator cart is needed to temporarily store, transport and replace the collimator. The collimator cart is usually placed next to the SPECT device to facilitate the replacement of the collimator. Figure 1 As shown, a probe 02 is mounted on a SPECT device 01, and a collimator 03 is installed in the position corresponding to the probe 02. A collimator cart 04 is placed next to the collimator 03 on the SPECT device 01. When collimator 03 is being replaced, collimator cart 04 must be fixed to one side of the SPECT device 01 and prevented from moving. This is achieved by a fixing and limiting mechanism on the ground and a pedal-operated self-locking mechanism on collimator cart 04. In the prior art, locking and unlocking the self-locking mechanism requires different drive structures, resulting in a complex structure and manual operation, which is inconvenient to operate. Summary of the Invention

[0004] In view of this, the present invention provides a pedal self-locking mechanism, the locking and unlocking of the mechanism need to be driven by the same structural member of the pedal, the driving structure is simpler, no manual operation is required, the operation is simple, and it is easy to use.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pedal self-locking mechanism, comprising:

[0007] Footrest mounting;

[0008] a rod fixing seat, fixedly connected to the pedal fixing seat;

[0009] A pedal rod for applying pedaling force, slidably connected to the pedal fixing seat and the rod fixing seat, and an unlocking rod is connected to the pedal rod;

[0010] A locking rod is slidably connected to the pedal fixing seat and the rod fixing seat, a limited locking rod is provided on the locking rod, the limited locking rod is slidably set on the rod fixing seat, the limited locking rod switches between the locked and unlocked positions of the rod fixing seat, the driving end of the unlocking rod is correspondingly provided with the end of the limited locking rod, and when the driving end of the unlocking rod drives the limited locking rod, the limited locking rod switches from the locked position of the rod fixing seat to the unlocked position;

[0011] The locking rod is connected to the pedal rod.

[0012] Optionally, the limit lock rod includes a cross-arranged locking rod and a limit rod, the limit rod is slidably connected to the locking rod, and a first spring is sleeved on the limit rod. The first spring is sleeved on the limit rod and is located on one side of the locking rod, and the ends of the locking rod and the limit rod extend out of the locking rod.

[0013] Optionally, the rod fixing seat is provided with a first through hole for the locking rod to pass through, and a first limiting sliding hole and a second limiting sliding hole are provided on a side wall of the first through hole, the locking rod is passed through the first limiting sliding hole, and the limiting rod is passed through the second limiting sliding hole;

[0014] A rotation bearing is provided at a position of the end of the locking rod corresponding to the driving end of the unlocking rod.

[0015] Optionally, the hole length of the second limiting sliding hole is arranged along the sliding direction of the locking rod, the first limiting sliding hole is an L-shaped through hole, the L-shaped through hole includes a first end through hole and a second end through hole arranged in communication, the hole length of the first end through hole is arranged along the sliding direction of the locking rod, and the hole length of the second end through hole is arranged perpendicular to the sliding direction of the locking rod;

[0016] The first end through hole and the second limiting sliding hole have the same length.

[0017] Optionally, the pedal fixing seat includes a connecting main plate, a first support plate and a second support plate, wherein the first support plate and the second support plate are spaced apart and arranged on the same side of the connecting main plate, and the rod fixing seat is arranged between the first support plate and the second support plate, and the rod fixing seat is connected to the connecting main plate;

[0018] The pedal rod is slidably connected to the first support plate, the locking rod is slidably connected to the second support plate, and the pedal rod and the locking rod are coaxially arranged.

[0019] Optionally, a second through hole is provided on the first support plate, and the pedal rod is slidably connected to the second through hole; a third through hole is provided on the second support plate, and the locking rod is slidably connected to the third through hole;

[0020] The side surfaces of the first support plate and the second support plate are connected with a cover plate, and the cover plate is arranged around the outer side of the unlocking rod on the rod fixing seat.

[0021] Optionally, a guide cylinder is provided on the surface of the second support plate away from the first support plate, the third through hole passes through the guide cylinder, the inner wall of the third through hole is provided with a limiting ring groove for placing the second spring, the groove opening of the limiting ring groove is provided close to the first support plate, and the other end of the second spring is in contact with the limiting ring platform on the locking rod.

[0022] Optionally, the locking rod includes a connecting end and a tightening end, the end of the connecting end is provided with a first spring placement groove, a third spring is placed in the first spring placement groove, a connecting boss is provided at the bottom of the first spring placement groove, the third spring is wound around the connecting boss, the foot pedal is connected to the connecting boss through a guide bolt, and the foot pedal is slidably connected to the guide bolt.

[0023] Optionally, a third limiting sliding hole and a connecting through hole are cross-arranged at a position of the connecting end close to the abutting end, the locking rod is slidably connected to the third limiting sliding hole, and the limiting rod is connected to the connecting through hole.

[0024] Optionally, the pedal rod includes a main rod body, one end of the main rod body close to the locking rod is provided with a second spring placement groove, and the other end is provided with a clearance groove, the clearance groove and the second spring placement groove are connected through a fourth through hole, the fourth through hole is slidably connected to a guide bolt, the tail end of the guide bolt is connected to the locking rod, and the end of the main rod body close to the locking rod is slidably connected to the locking rod;

[0025] A third spring for driving the main rod to reset is placed in the second spring placement groove.

[0026] Optionally, a connecting ring is fixedly connected to the main rod body, the connecting ring is sleeved on the outer surface of the main rod body, one end of the unlocking lever is rotatably connected to the connecting ring via a rotating shaft, and the other end of the unlocking lever is a driving end, and the driving end is correspondingly arranged with the limit lock rod;

[0027] A torsion spring for driving the main rod body to return is provided at a position of the rotating shaft close to the main rod body.

[0028] Optionally, a limiting inclined surface and a limiting plane are provided on a side of the unlocking lever close to the connecting ring, the limiting inclined surface and the limiting plane are provided close to the rotating shaft, and a driving inclined surface is provided on the driving end of the unlocking lever, and the driving inclined surface is provided correspondingly to the end of the locking rod of the limiting lock lever in the locked position;

[0029] One end of the torsion spring is connected to the rotating shaft, and the other end is pressed on the limiting inclined surface. The limiting plane is arranged corresponding to the limiting platform of the connecting ring.

[0030] It can be seen from the above technical solution that the pedal self-locking mechanism provided by the present invention includes a pedal fixing seat, a rod fixing seat, a pedal rod and a locking rod. When the pedal rod is pressed down by the pedal force, the limit lock rod slides to the locking position of the rod fixing seat. At this time, the locking rod falls under the push of the pedal rod and is locked in the fixing device on the ground. When unlocking is required, the pedal rod is stepped on again, and the pedal rod on the pedal rod pushes the unlocking rod to move. The unlocking rod pushes the limit lock rod out of the locked position, causing the limit lock rod to slide from the locked position to the unlocked position. At the same time, the locking rod is retracted, causing the locking rod to be separated from the fixing device on the ground. The pedal self-locking mechanism is located at the right rear side of the collimator cart. After reaching the collimator replacement position, it can be locked by stepping on it. After completing the collimator replacement, it is unlocked by stepping on it and pushed away from the collimator cart. The pedal self-locking mechanism of the present invention uses a pedal rod to achieve locking. The locking rod is stepped down and locked in a ground fixing device to achieve positioning and fixation of the collimator trolley. When unlocking is required, the same position is stepped on by the foot to raise the locking rod and unlock the collimator trolley. The locking and unlocking of the mechanism require the same driving structure, namely the pedal rod. Compared with the prior art that uses different structures for driving locking and unlocking, the driving structure is simpler, effectively avoiding incorrect operation, and does not require manual operation, so the operation is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 It is a structural diagram of a SPECT device in the prior art;

[0033] Figure 2 A schematic structural diagram of a pedal self-locking mechanism provided by an embodiment of the present invention from one angle;

[0034] Figure 3A schematic structural diagram of the pedal self-locking mechanism provided by an embodiment of the present invention from another angle;

[0035] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at the AA position in FIG;

[0036] Figure 5 for Figure 4 A schematic diagram of the partially enlarged structure of part B in FIG.

[0037] Figure 6 A structural schematic diagram of a pedal self-locking mechanism provided by an embodiment of the present invention from another angle;

[0038] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of the CC position;

[0039] Figure 8 A schematic cross-sectional view of the connection between the unlocking lever and the pedal lever provided in an embodiment of the present invention;

[0040] Figure 9 A schematic structural diagram of an angle of the pedal self-locking mechanism provided by an embodiment of the present invention with the cover plate removed;

[0041] Figure 10 A schematic structural diagram of the pedal self-locking mechanism provided by an embodiment of the present invention after removing the cover plate from another angle;

[0042] Figure 11 A schematic structural diagram of an angle of a position-limiting lock rod provided by an embodiment of the present invention;

[0043] Figure 12 A schematic structural diagram of a position-limiting lock rod provided by an embodiment of the present invention from another angle;

[0044] Figure 13 A schematic structural diagram of a locking lever provided in an embodiment of the present invention;

[0045] Figure 14 A schematic structural diagram of a rod fixing seat provided by an embodiment of the present invention at one angle;

[0046] Figure 15 A schematic structural diagram of a rod fixing seat provided by an embodiment of the present invention from another angle;

[0047] Figure 16 A schematic structural diagram of a footrest fixing seat provided at one angle according to an embodiment of the present invention;

[0048] Figure 17 A schematic structural diagram of a footrest fixing seat provided by an embodiment of the present invention from another angle;

[0049] Figure 18 A schematic cross-sectional view of a footrest fixing seat provided in an embodiment of the present invention;

[0050] Figure 19 A schematic structural diagram of a locking rod provided at one angle in an embodiment of the present invention;

[0051] Figure 20 A schematic structural diagram of a locking rod provided by an embodiment of the present invention from another angle;

[0052] Figure 21 for Figure 20 Schematic diagram of the cross-sectional structure of the DD position in FIG;

[0053] Figure 22 A schematic structural diagram of an angle of a pedal rod provided by an embodiment of the present invention;

[0054] Figure 23 A schematic structural diagram of a pedal rod provided by an embodiment of the present invention from another angle;

[0055] Figure 24 for Figure 23 Schematic diagram of the cross-sectional structure of the EE position in FIG;

[0056] Figure 25 A schematic structural diagram of an angle of the unlocking lever provided by an embodiment of the present invention;

[0057] Figure 26 A schematic structural diagram of the unlocking lever provided by an embodiment of the present invention from another angle;

[0058] Figure 27 A schematic diagram of the structure in which the unlocking lever provided by an embodiment of the present invention is installed on the rotating shaft;

[0059] Figure 28 A schematic structural diagram of the pedal self-locking mechanism provided by an embodiment of the present invention in its initial position (with the cover plate viewed through);

[0060] Figure 29 A schematic structural diagram of the pedal self-locking mechanism provided by an embodiment of the present invention after the pedal rod is stepped on (with the cover plate viewed through);

[0061] Figure 30 A schematic structural diagram of the pedal self-locking mechanism provided by an embodiment of the present invention after the pedal rod is reset (with the cover plate viewed through);

[0062] Figure 31 This is a structural schematic diagram of the unlocking rod pushing the locking rod to unlock provided by an embodiment of the present invention.

[0063] in:

[0064] 01. SPECT equipment, 02. Probe, 03. Collimator, 04. Collimator cart,

[0065] 1. Footrest fixed seat,

[0066] 101. Connecting main board, 102. First supporting plate, 103. Second supporting plate, 104. Guide cylinder, 105. Third through hole, 106. Second through hole, 107. Third connecting hole, 108. Second connecting hole, 109. Position limiting through hole, 110. First threaded connecting hole, 111. Weight reduction through hole, 112. Position limiting ring groove,

[0067] 2. Cover plate,

[0068] 3. Locking lever,

[0069] 301, first spring placement groove, 302, third limiting sliding hole, 303, limiting ring platform, 304, connecting through hole, 305, connecting end, 306, tightening end, 307, connecting boss, 308, second threaded connecting hole, 309, opening hole,

[0070] 4. Foot pedal,

[0071] 401, main rod body, 402, cover, 403, limit long slot, 404, give way slot, 405, fourth through hole, 406, second spring placement slot,

[0072] 5. The first screw,

[0073] 6. Guide bolts,

[0074] 7. Limit lock rod,

[0075] 701, limit rod, 702, locking rod, 7021, sliding connection hole, 703, rotating bearing, 704, first spring,

[0076] 8. Rod fixing seat,

[0077] 801, connecting plate, 802, connecting body, 803, first through hole, 804, second limiting sliding hole, 805, first limiting sliding hole, 806, first connecting hole,

[0078] 9. Connecting ring,

[0079] 10. The third spring,

[0080] 11. Second spring,

[0081] 12. Unlock lever,

[0082] 1201, limiting plane, 1202, limiting inclined plane, 1203, driving inclined plane, 1204, auxiliary inclined plane,

[0083] 13. The second screw,

[0084] 14. Torsion spring,

[0085] 15. Rotating shaft. DETAILED DESCRIPTION

[0086] The invention discloses a pedal self-locking mechanism. The locking and unlocking of the mechanism need to be driven by the same structural member of the pedal. The driving structure is simpler, manual operation is not required, the operation is simple, and the use is convenient.

[0087] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0088] Reference Figures 2 to 27 The pedal self-locking mechanism of the present invention includes a pedal fixing seat 1, a rod fixing seat 8, a pedal rod 4 and a locking rod 3. The pedal fixing seat 1 is used to connect to the frame of the collimator vehicle 04. The rod fixing seat 8 is fixedly connected to the pedal fixing seat 1. The pedal rod 4 is slidably connected to the pedal fixing seat 1 and the rod fixing seat 8, and an unlocking rod 12 is connected to the pedal rod 4. The locking rod 3 is slidably connected in the pedal fixing seat 1 and the rod fixing seat 8, and the locking rod 3 is connected to the pedal rod 4. A limited lock rod 7 is provided on the locking rod 3, and the limited lock rod 7 is slidably set on the rod fixing seat 8, so that the limited lock rod 7 switches between different positions on the rod fixing seat 8, thereby realizing the switching of the limited lock rod 7 between the locked and unlocked positions of the rod fixing seat 8. The driving end of the unlocking rod 12 is correspondingly arranged to the end of the limited lock rod 7. When the driving end of the unlocking rod 12 drives the limited lock rod 7, the limited lock rod 7 switches from the locked position of the rod fixing seat 8 to the unlocked position.

[0089] The end of the pedal rod 4 away from the locking rod 3 is used for driving by the user applying pedal force.

[0090] The pedal self-locking mechanism of the present invention includes a pedal fixing seat 1, a rod fixing seat 8, a pedal rod 4 and a locking rod 3. When the pedal rod 4 is pressed down by the pedal force, the limit lock rod 7 slides to the locking position of the rod fixing seat 8. At this time, the locking rod 3 falls down under the push of the pedal rod 4 and is locked in the fixing device on the ground. When unlocking is required, the pedal rod 4 is stepped on again, and the pedal rod 4 on the pedal rod 4 pushes the unlocking rod 12 to move. The unlocking rod 12 pushes the limit lock rod 7 out of the locked position, causing the limit lock rod 7 to slide from the locked position to the unlocked position. At the same time, the locking rod 3 is retracted, causing the locking rod 3 to be separated from the fixing device on the ground. The pedal self-locking mechanism is located at the right rear side of the collimator cart. After reaching the collimator replacement position, it can be locked by stepping on it. After completing the collimator replacement, it is unlocked by stepping on it and pushed away from the collimator cart. The pedal self-locking mechanism of the present invention uses the pedal rod 4 to achieve locking. The locking rod 3 is stepped down and locked in the ground fixing device to achieve the positioning and fixation of the collimator cart 04. When unlocking is required, the same position is stepped on by the foot, that is, the locking rod 3 is raised to unlock the collimator cart 04. The locking and unlocking of the self-locking mechanism require the same driving structure, namely the pedal rod drive. Compared with the prior art that uses a different structure for driving locking and unlocking, the driving structure is simpler, effectively avoiding incorrect operation, and does not require manual operation, so the operation is simple and easy to use.

[0091] like Figures 11 to 13 As shown, the position-limiting lock rod 7 includes a cross-arranged locking rod 702 and a position-limiting rod 701. The position-limiting rod 701 is slidably connected to the locking rod 702. A first spring 704 is sleeved on the position-limiting rod 701. The first spring 704 is sleeved on the side of the position-limiting rod 701 located on the locking rod 702. Specifically, the first spring 704 is positioned away from the locking rod 702 in the locking position, thereby facilitating the first spring 704 to push the locking rod 702 to the locked position. The ends of the locking rod 702 and the position-limiting rod 701 extend beyond the locking rod 3. The locking rod 702 is provided with a sliding connection hole 7021, into which the position-limiting rod 701 is slidably connected. The position-limiting rod 701 is used to limit the position of the locking rod 702 to prevent it from sliding out. In one embodiment, the limiting rod 701 is a screw rod, and the tail end of the limiting rod 701 is connected to a nut to facilitate the connection between the limiting rod 701 and the locking rod 702. Preferably, the locking rod 702 and the limiting rod 701 are arranged perpendicularly and crosswise. The two ends of the locking rod 702 are connected to the rotating bearing 703.

[0092] In order to facilitate installation, the rod fixing seat 8 includes a connecting plate 801 and a connecting body 802 connected together, such as Figure 14 and Figure 15As shown, the connecting body 802 is provided with a first through-hole 803 for the locking rod 3 to pass through, and the locking rod 3 is slidably connected within the first through-hole 803. A first limiting sliding hole 805 and a second limiting sliding hole 804 are provided on the side wall of the first through-hole 803. There are two first limiting sliding holes 805, which are 180° apart and correspondingly provided on the side wall of the first through-hole 803. There are two second limiting sliding holes 804, which are correspondingly provided on the side wall of the first through-hole 803. The end of the locking rod 702 is inserted into the first limiting sliding hole 805, and the end of the limiting rod 701 is inserted into the second limiting sliding hole 804. The end of the locking rod 702 extends out of the first limiting sliding hole 805, and the portion of the extended end corresponding to the unlocking rod 12 is mounted with a rotating bearing 703. The connecting plate 801 is provided with a first connecting hole 806, and the rod fixing seat 8 is connected to the pedal fixing seat 1 through a connecting piece connected in the first connecting hole 806, wherein the connecting piece here can be a bolt. In order to ensure the reliability of the connection, Figure 14 As shown, four first connection holes 806 are provided, and the four first connection holes 806 are symmetrically arranged on both sides of the connecting body 802.

[0093] In order to ensure the smooth sliding of the locking rod 3, the length of the second limiting sliding hole 804 is set along the sliding direction of the locking rod 3, leaving space for the locking rod 3 to slide. Figure 14 and Figure 15 As shown, the L-shaped through hole includes a first end through hole and a second end through hole that are interconnected. The length of the first end through hole is arranged along the sliding direction of the locking rod 3, that is, the first end through hole is arranged parallel to the second limiting sliding hole 804, and the length of the second end through hole is arranged perpendicular to the sliding direction of the locking rod 3. The position of the hole end of the second end through hole away from the first end through hole corresponds to the locked position when the locking rod 702 slides, and the position of the hole end of the first end through hole away from the second end through hole corresponds to the unlocked position when the locking rod 702 slides. It can be understood that the first end through hole and the second limiting sliding hole 804 have the same length, and the starting and ending positions are set to correspond, that is, the starting and ending heights are set to correspond, thereby facilitating the sliding of the limiting locking rod 7.

[0094] The pedal fixing seat 1 includes a connecting main plate 101, a first supporting plate 102 and a second supporting plate 103. Figures 16 to 18As shown, the first support plate 102 and the second support plate 103 are spaced apart and arranged on the same side of the connecting main plate 101. The rod fixing seat 8 is arranged between the first support plate 102 and the second support plate 103, and the rod fixing seat 8 is connected to the connecting main plate 101. In order to facilitate connection, a second connecting hole 108 is provided on the connecting main plate 101. The second connecting hole 108 is provided corresponding to the first connecting hole 806. The second connecting hole 108 is a threaded hole, and the first connecting hole 806 is a smooth hole. The rod fixing seat 8 is connected to the pedal fixing seat 1 by bolts connected in the first connecting hole 806 and the second connecting hole 108. In order to facilitate connection to the frame of the collimator vehicle 04, a third connecting hole 107 is provided on the connecting main plate 101, as shown Figure 16 As shown, there are four third connection holes 107, which are located outside the second connection holes 108. In order to reduce the overall weight, the pedal fixing base 1 is provided with weight-reducing through holes 111.

[0095] To facilitate sliding connection with the footrest rod 4, the first support plate 102 is provided with a second through-hole 106, into which the footrest rod 4 is slidably connected. To facilitate sliding connection with the locking rod 3, the second support plate 103 is provided with a third through-hole 105, into which the locking rod 3 is slidably connected. It will be appreciated that to avoid interference with the sliding movement of the footrest rod 4 and the locking rod 3, the second through-hole 106 and the third through-hole 105 are coaxially arranged, thereby ensuring that the footrest rod 4 and the locking rod 3 are coaxially arranged, facilitating the footrest rod 4 to push the locking rod 3.

[0096] In order to protect the sliding connection structure between the footrest rod 4, the locking rod 3 and the rod fixing seat 8, a cover plate 2 is connected to the side of the first support plate 102 and the second support plate 103. The cover plate 2 is arranged around the outside of the unlocking rod 12 on the rod fixing seat 8. One end of the cover plate 2 is connected to the first support plate 102 by a first screw 5, and the other end is connected to the second support plate 103 by a first screw 5. In order to facilitate the connection of the first screw 5, the side of the first support plate 102 and the second support plate 103 are both provided with a first threaded connection hole 110, as shown in FIG. Figure 16 To facilitate limiting the sliding stroke of the pedal rod 4, a limiting through hole 109 is further provided on the first support plate 102. The limiting through hole 109 is connected to the second through hole 106. A limiting long slot 403 is provided on the pedal rod 4 at a position corresponding to the limiting through hole 109. The tail end of the limiting screw connected to the limiting through hole 109 is inserted into the limiting long slot 403, thereby limiting the position of the pedal rod 4.

[0097] In one embodiment, a guide cylinder 104 is provided on the surface of the second support plate 103 away from the first support plate 102, and a third through hole 105 passes through the guide cylinder 104. The inner wall of the third through hole 105 is provided with a limiting ring groove 112 for placing the second spring 11. Figure 18As shown, the opening of the limiting ring groove 112 is arranged close to the first support plate 102, and the other end of the second spring 11 contacts the limiting ring platform 303 on the locking rod 3. The second spring 11 is used to provide power for the retraction of the locking rod 3.

[0098] In order to facilitate the connection, the locking rod 3 includes a connecting end 305 and a tightening end 306. Figures 19 to 21 The connecting end 305 is used to connect to the pedal rod 4, and the abutting end 306 is used to connect to a fixture on the ground. The end of the connecting end 305 is provided with a first spring placement groove 301, in which a third spring 10 is placed. The third spring 10 is used to drive the pedal rod 4 back to its original position. To connect the pedal rod 4 to the locking rod 3, a connecting boss 307 is provided at the bottom of the first spring placement groove 301. The connecting boss 307 is arranged higher than the bottom of the first spring placement groove 301. The third spring 10 is placed between the side of the connecting boss 307 and the side of the first spring placement groove 301. The third spring 10 is arranged around the connecting boss 307, and the outer surface of the connecting boss 307 can also be used to guide the third spring 10. The connecting boss 307 is provided with a second threaded connection hole 308. The pedal rod 4 is connected to the second threaded connection hole 308 via a guide bolt 6. The pedal rod 4 is slidably connected to the guide bolt 6. One end of the third spring 10 is limited by the bottom of the first spring placement groove 301 , and the other end is limited by the pedal rod 4 .

[0099] In order to realize the connection between the limiting lock rod 7 and the locking rod 3, the connection end 305 of the locking rod 3 is provided with a third limiting sliding hole 302 and a connecting through hole 304 arranged crosswise near the abutting end 306, as shown in FIG. Figure 19 and Figure 21 As shown, the locking rod 702 is slidably connected to the third limiting sliding hole 302, and the limiting rod 701 is connected to the connecting through hole 304. In one embodiment, the third limiting sliding hole 302 and the connecting through hole 304 are arranged vertically and crosswise. The third limiting sliding hole 302 is arranged corresponding to the second end through hole of the first limiting sliding hole 805. The third limiting sliding hole 302 radially penetrates the connecting end 305 of the locking rod 3, and the connecting through hole 304 also radially penetrates the connecting end 305 of the locking rod 3. An opening hole 309 is provided at the end of the tightening end 306 away from the connecting end 305. The opening hole 309 is arranged along the axial direction of the tightening end 306, and the opening hole 309 is coaxial with the tightening end 306. By providing the opening hole 309, the weight of the locking rod 3 can be reduced and the strength of the structure can be ensured.

[0100] The pedal rod 4 includes a main rod body 401, such as Figures 22 to 24A second spring receiving groove 406 is provided at the end of the main rod 401 near the locking rod 3. A third spring 10 is placed in the second spring receiving groove 406 to drive the main rod 401 back to its original position. The bottom of the second spring receiving groove 406 is used to limit one end of the third spring 10. A clearance groove 404 is provided at the other end of the main rod 401. This clearance groove 404 facilitates the installation of the guide bolt 6. The clearance groove 404 and the second spring receiving groove 406 are connected by a fourth through hole 405. The fourth through hole 405 is a smooth hole, and the guide bolt 6 is slidably connected therein, thereby guiding the main rod 401. The tail end of the guide bolt 6 is threaded and threadedly connected to the second threaded connection hole 308 of the locking rod 3. The end of the main rod 401 near the locking rod 3 is slidably connected to the first spring receiving groove 301. The top cover of the clearance groove 404 is provided with a sealing cover 402 to prevent dust and other debris from entering the clearance groove 404 .

[0101] To facilitate connection with the unlocking lever 12 and simultaneously limit its position, a connecting ring 9 is fixedly attached to the main rod body 401. The connecting ring 9 is connected to the main rod body 401 via a second screw 13 and is sleeved onto the outer surface of the main rod body 401. One end of the unlocking lever 12 is rotatably connected to the connecting ring 9 via a rotating shaft 15. The other end of the unlocking lever 12 serves as a driving end, which is positioned to correspond to a rotating bearing 703 on the locking rod 702 of the position-limiting lock rod 7. A torsion spring 14 is provided near the rotating shaft 15 to drive the main rod body 401 back into position. When one end of the unlocking lever 12 rotates, the driving end of the unlocking lever 12 rotates around the rotating shaft 15 during the retraction of the foot pedal 4 after being pressed, thereby clearing the end of the locking rod 702. The rotating bearing 703 provided at the end of the locking rod 702 converts sliding friction into rotational friction, reducing the frictional force on the driving end of the unlocking lever 12 as it moves out of the way.

[0102] In one embodiment, the unlocking lever 12 is provided with a limiting inclined surface 1202 and a limiting plane 1201 adjacent to each other on the side close to the connecting ring 9. Figure 25 and Figure 26 As shown, the limiting slope 1202 and the limiting plane 1201 are set close to the rotating shaft 15. One end of the torsion spring 14 is connected to the rotating shaft 15, and the other end is pressed on the limiting slope 1202, so as to press the unlocking lever 12 back to its original position. When the unlocking lever 12 is in its original position, the limiting plane 1201 contacts the limiting platform on the connecting ring 9, as shown in FIG. Figure 27As shown, thanks to the support provided by the limiting surface on the connecting ring 9, the driving end of the unlocking lever 12 is able to push the rotating bearing 703 in the locked position to unlock the lock. The driving end of the unlocking lever 12 is provided with a driving inclined surface 1203, which is arranged to correspond to the rotating bearing 703 of the locking lever 702 of the limited lock lever 7 in the locked position. The driving end of the unlocking lever 12 is also provided with an auxiliary inclined surface 1204, which is arranged on opposite sides of the driving end and has the same inclination angle as the driving inclined surface 1203.

[0103] The pedal self-locking mechanism provided by the present invention uses the foot to achieve locking and unlocking, without the need for manual operation, thus freeing the user's hands. When locked, the locking rod 3 has no rebound displacement, and the locking is more reliable. Locking and unlocking the pedals in the same position is simple, practical, and has a strong load-bearing capacity. In the pedal self-locking mechanism provided by the present invention, after the locking rod 3 falls, the locking rod 702 slides into the locking position limit of the first limiting slide hole 805, so that the locking rod 3 does not rebound after falling and is directly locked, thereby achieving locking without rebound or collapse. Since the locking rod 3 does not rebound after locking, there is no need to reserve a rebound stroke, thereby effectively reducing the thickness of the ground fixing device and reducing the risk of stumbling on people during use. The internal locking structure of the pedal self-locking mechanism provided by the present invention can meet the regulatory requirements of bearing a load of 135kg without deformation or damage. Locking or unlocking can be completed by applying a very small pedal force, and the locking strength is constant.

[0104] When the pedal self-locking mechanism of the present invention is in the initial position, Figure 28 As shown, under the action of the second spring 11, the pedal rod 4 and the unlocking rod 12 are lifted, and the locking rod 3 is raised, and is now in the unlocked state. When the foot is stepped on the pedal rod 4, the elastic force of the second spring 11 is overcome, so that the pedal rod 4, the unlocking rod 12, the locking rod 3 and the limit lock rod 7 move downward to the locked position. At this time, the limit lock rod 7 slides to the entrance position of the second end through hole of the first limit slide hole 805, as shown in FIG. Figure 29 As shown, the locking rod 702 is pushed into the locking position of the first limiting sliding hole 805 along the limiting rod 701 under the action of the first spring 704, thereby achieving locking. When the foot is released, the locking rod 3 is subjected to the elastic force of the second spring 11, and the locking rod 3, the pedal rod 4 and the unlocking rod 12 are lifted up. The auxiliary inclined surface 1204 of the unlocking rod 12 slides across the surface of the rotating bearing 703, allowing the driving end of the unlocking rod 12 to bypass the limiting locking rod 7. Then, the unlocking rod 12 returns to its original position under the action of the torsion spring 14, as shown in FIG. Figure 30 As shown, under the action of the third spring 10, the pedal rod 4 returns to its original position. When the pedal rod 4 is stepped on again, the pedal moves downward, and the pedal rod 4 drives the unlocking rod 12 to move synchronously. The driving inclined surface 1203 of the unlocking rod 12 pushes the locking rod 702 to move in the unlocking direction, as shown in FIG. Figure 31As shown, the arrows in the figure indicate the movement directions of the various components. When the locking rod 702 moves to the first end through-hole of the first limiting slide hole 805, the second spring 11 pushes the locking rod 3, the pedal rod 4, the unlocking rod 12, and the limiting lock rod 7 upward, thereby unlocking the pedal. This completes the entire process from locking to unlocking of the pedal self-locking mechanism.

[0105] In the description of this solution, it should be understood that the terms "upper", "lower", "vertical", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on this solution.

[0106] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this solution, "plurality" means two or more, unless otherwise specifically defined.

[0107] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0108] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pedal self-locking mechanism, characterized in that: include: Footrest mounting; a rod fixing seat, fixedly connected to the pedal fixing seat; A pedal rod for applying pedaling force, slidably connected to the pedal fixing seat and the rod fixing seat, and an unlocking rod is connected to the pedal rod; A locking rod is slidably connected to the pedal fixing seat and the rod fixing seat, a limited locking rod is provided on the locking rod, the limited locking rod is slidably set on the rod fixing seat, the limited locking rod switches between the locked and unlocked positions of the rod fixing seat, the driving end of the unlocking rod is correspondingly provided with the end of the limited locking rod, and when the driving end of the unlocking rod drives the limited locking rod, the limited locking rod switches from the locked position of the rod fixing seat to the unlocked position; The locking rod is connected to the pedal rod.

2. The pedal self-locking mechanism according to claim 1, characterized in that: The limit lock rod includes a cross-arranged locking rod and a limit rod, the limit rod is slidably connected to the locking rod, a first spring is sleeved on the limit rod, the first spring is sleeved on the limit rod and is located on one side of the locking rod, and the ends of the locking rod and the limit rod extend out of the locking rod.

3. The pedal self-locking mechanism according to claim 2, characterized in that: The rod fixing seat is provided with a first through hole for the locking rod to pass through, and the side wall of the first through hole is provided with a first limiting sliding hole and a second limiting sliding hole, the locking rod is passed through the first limiting sliding hole, and the limiting rod is passed through the second limiting sliding hole; A rotation bearing is provided at a position of the end of the locking rod corresponding to the driving end of the unlocking rod.

4. The pedal self-locking mechanism according to claim 3, characterized in that: The second limiting sliding hole is arranged with a hole length along the sliding direction of the locking rod. The first limiting sliding hole is an L-shaped through hole, and the L-shaped through hole includes a first end through hole and a second end through hole that are connected to each other. The hole length of the first end through hole is arranged with a hole length along the sliding direction of the locking rod, and the hole length of the second end through hole is arranged perpendicular to the sliding direction of the locking rod. The first end through hole and the second limiting sliding hole have the same length.

5. The pedal self-locking mechanism according to claim 1, characterized in that: The pedal fixing seat includes a connecting main plate, a first support plate and a second support plate, wherein the first support plate and the second support plate are spaced apart and arranged on the same side of the connecting main plate, and the rod fixing seat is arranged between the first support plate and the second support plate, and the rod fixing seat is connected to the connecting main plate; The pedal rod is slidably connected to the first support plate, the locking rod is slidably connected to the second support plate, and the pedal rod and the locking rod are coaxially arranged.

6. The pedal self-locking mechanism according to claim 5, characterized in that: The first support plate is provided with a second through hole, the pedal rod is slidably connected to the second through hole, the second support plate is provided with a third through hole, the locking rod is slidably connected to the third through hole; The side surfaces of the first support plate and the second support plate are connected with a cover plate, and the cover plate is arranged around the outer side of the unlocking rod on the rod fixing seat.

7. The pedal self-locking mechanism according to claim 6, characterized in that: A guide cylinder is provided on the surface of the second support plate away from the first support plate, the third through hole passes through the guide cylinder, and the inner wall of the third through hole is provided with a limiting ring groove for placing the second spring, the groove opening of the limiting ring groove is arranged close to the first support plate, and the other end of the second spring is in contact with the limiting ring platform on the locking rod.

8. The pedal self-locking mechanism according to claim 2, characterized in that: The locking rod includes a connecting end and a tightening end, the end of the connecting end is provided with a first spring placement groove, a third spring is placed in the first spring placement groove, a connecting boss is provided at the bottom of the first spring placement groove, the third spring is wound around the connecting boss, the foot rod is connected to the connecting boss through a guide bolt, and the foot rod is slidably connected to the guide bolt.

9. The pedal self-locking mechanism according to claim 8, characterized in that: A third limiting sliding hole and a connecting through hole are cross-arranged at a position of the connecting end close to the abutting end. The locking rod is slidably connected to the third limiting sliding hole, and the limiting rod is connected to the connecting through hole.

10. The pedal self-locking mechanism according to claim 1, characterized in that: The pedal rod includes a main rod body, one end of the main rod body close to the locking rod is provided with a second spring placement groove, and the other end is provided with a clearance groove, the clearance groove and the second spring placement groove are connected through a fourth through hole, the fourth through hole is slidably connected to a guide bolt, the tail end of the guide bolt is connected to the locking rod, and the end of the main rod body close to the locking rod is slidably connected to the locking rod; A third spring for driving the main rod to reset is placed in the second spring placement groove.

11. The pedal self-locking mechanism according to claim 10, characterized in that: The main rod body is fixedly connected to a connecting ring, which is sleeved on the outer surface of the main rod body. One end of the unlocking lever is rotatably connected to the connecting ring via a rotating shaft, and the other end of the unlocking lever is a driving end, which is correspondingly arranged with the limit lock rod. A torsion spring for driving the main rod body to return is provided at a position of the rotating shaft close to the main rod body.

12. The pedal self-locking mechanism according to claim 11, characterized in that: A limiting inclined surface and a limiting plane are provided on a side of the unlocking lever close to the connecting ring, and the limiting inclined surface and the limiting plane are provided close to the rotating shaft. A driving inclined surface is provided on the driving end of the unlocking lever, and the driving inclined surface is provided correspondingly to the end of the locking rod of the limiting lock lever in the locked position; One end of the torsion spring is connected to the rotating shaft, and the other end is pressed on the limiting inclined surface. The limiting plane is arranged corresponding to the limiting platform of the connecting ring.

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