Stable quick-release trundle frame

Abstract

The utility model discloses a stable quick-release trundle frame which comprises a base, a trundle assembly and a lock catch assembly. A containing cavity in the base comprises a containing cavity body, a bottom wall and an insertion through hole. The bottom wall comprises a bottom wall body, a first baffle and a second baffle. The trundle assembly comprises a trundle connecting base and a trundle frame. The lock catch assembly comprises a sliding buckle piece and a spring. The limiting clamping pieces in the sliding buckle piece comprise the first limiting clamping piece and the second limiting clamping piece which are sequentially arranged on one side of the driving rod. The length between the first limiting clamping pieces in the two limiting clamping pieces is smaller than the length of the first baffle, and the length between the second limiting clamping pieces in the two limiting clamping pieces is smaller than the length of the bottom wall body. The stable quick-release trundle frame is reasonable in structure, and the stability of insertion connection or separation between the base and the trundle assembly is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of luggage casters, in particular to a stable and quick-detachable caster frame. Background Technique

[0002] A luggage case, also known as a travel case or rolling suitcase, is a box used to carry items when going out. It is one type of luggage. Usually, a luggage case is used to place clothes, personal care products, and souvenirs needed during a journey. To facilitate people's convenient movement at any time, casters are provided at the bottom of the luggage case to facilitate the sliding of the luggage case. In the current market, the design of luggage case casters tends to be easy to disassemble and repair to meet the needs of different users and solve the problem of difficult replacement after caster damage. However, in the existing detachable caster designs, although some products achieve the convenience of disassembly, there may be problems of insufficient stability in actual use.

[0003] For example, a caster structure that is easy to assemble or disassemble in a Chinese patent, with the application number CN202121938918.2, includes a roller assembly, a roller bracket, and a mounting bracket. The roller assembly is arranged on the roller bracket. The roller bracket includes a fastening member. The mounting bracket includes a perforation, an elastic member, and a movable member. The movable member is horizontally movably connected to the elastic member. One end of the fastening member passes through the perforation in the mounting bracket. The movable member can be fastened and connected to one end of the fastening member passing through the perforation in the mounting bracket under the drive of the elastic member. However, in actual use of the mounting bracket, due to the easy misalignment between the perforation and the movable member, the disassembly and assembly of the caster are affected. Content of the Utility Model

[0004] In view of this, the utility model provides a stable and quick-detachable caster frame with a stable disassembly and assembly structure to meet industrial requirements.

[0005] A stable and quick-release caster bracket includes a base for connecting a luggage case, a caster assembly disposed on the base, and a locking component disposed between the base and the caster assembly. The base includes a base body, a mounting seat disposed on the base body, a receiving cavity disposed on the mounting seat, a locking limit component disposed in the receiving cavity, a button through-hole disposed on the side wall of the mounting seat and communicating with the receiving cavity, two symmetrically disposed plug-in mounting units in the receiving cavity, a pressing plate disposed on the locking limit component, and a positioning groove unit disposed on the mounting seat and received in the receiving cavity. The receiving cavity includes a receiving cavity body, a bottom wall disposed in the receiving cavity body, and two symmetrically disposed plug-in through-holes on the bottom wall. The bottom wall includes a bottom wall body fixedly connected to the side wall of the mounting seat, a first baffle and a second baffle sequentially disposed at one end of the bottom wall body facing the plug-in through-hole. The caster assembly includes a caster connecting seat inserted on the base and a caster bracket disposed on the caster connecting seat. The caster connecting seat includes a connecting seat body, two symmetrically disposed clamping members inserted into the plug-in through-holes on the connecting seat body, and two clamping units respectively disposed on the inner side walls of the clamping members. The clamping member includes a first clamping member and a second clamping member disposed on one side of the first clamping member. The inner side wall of the clamping member is stepped. The locking component includes a sliding clamping member inserted on the mounting seat and a spring disposed at one end of the sliding clamping member. The sliding clamping member includes a driving rod, two symmetrically disposed limit clamping members on both sides of the driving rod, a spring receiving groove disposed at one end of the driving rod, a mounting through-hole disposed on the driving rod, a spring positioning member disposed in the spring receiving groove, and a driving button disposed at one end of the driving rod. Each of the limit clamping members includes a first limit clamping member and a second limit clamping member sequentially disposed on one side of the driving rod. The length between the second limit clamping members of the two limit clamping members is greater than the length of the first baffle, the length between the first limit clamping members of the two limit clamping members is greater than the length of the second baffle, the length between the first limit clamping members of the two limit clamping members is less than the length of the first baffle, and the length between the second limit clamping members of the two limit clamping members is less than the length of the bottom wall body. When the base is separated from the caster assembly, the first limit clamping member corresponds to the first baffle, the second limit clamping member corresponds to the bottom wall body, and a stepped structure is formed between the first limit clamping member and the first baffle, so as to facilitate the insertion or separation between the base and the caster assembly.

[0006] Further, the base further includes a reinforcing member disposed between the base body and the mounting seat.

[0007] Further, the plug-in mounting unit includes at least two plug-in members disposed on the side wall of the mounting base and corresponding to the plug-in through holes, and at least one plug-in slot disposed on the side wall of the mounting base and corresponding to the plug-in through holes.

[0008] Further, the pressing plate includes a pressing plate body, a pressing plate positioning member disposed at one end of the pressing plate body, and a pressing plate mounting through hole disposed on the pressing plate body.

[0009] Further, the positioning groove unit includes a spring positioning groove disposed on the mounting base and received in the accommodating cavity, and a pressing plate positioning groove disposed at an end of the spring positioning groove facing away from the caster assembly. The length of the pressing plate positioning groove is greater than the length of the spring positioning groove, and the pressing plate positioning groove is disposed on the top of the spring positioning groove.

[0010] Further, the caster connecting seat further includes two guiding units respectively disposed on the outer side walls of the clamping members. Each guiding unit includes at least two guiding grooves disposed on the outer side walls of the clamping members, and at least one guiding protrusion disposed on the outer side walls of the clamping members.

[0011] Further, each clamping unit includes a first positioning groove disposed on the inner side wall of the first clamping member, and a second positioning groove disposed on the inner side wall of the second clamping member.

[0012] Further, the lock limiting assembly includes a threaded tube fixedly connected to the accommodating cavity, and a screw screwed onto the threaded tube.

[0013] Further, the outer diameter of the threaded tube is smaller than the length of the mounting through hole.

[0014] Further, the gap between the second clamping members among the two clamping members is equal to the length of the first baffle, and the gap between the first clamping members among the two clamping members is equal to the length of the second baffle.

[0015] Compared with the prior art, the stable and quick-release caster bracket provided by the present utility model improves the positions of the caster assembly and the latch assembly on the base through the cooperation of the accommodation cavity in the base with the caster connecting seat in the caster assembly and the sliding latch in the latch assembly. The accommodation cavity includes an accommodation cavity body, a bottom wall disposed within the accommodation cavity body, and two symmetrically disposed insertion through holes on the bottom wall. The bottom wall cooperates with the caster connecting seat and the sliding latch through a bottom wall body, a first baffle, and a second baffle. The caster connecting seat has a clamping member on the connecting seat body and inserted into the insertion through hole, and two clamping units respectively disposed on the inner side walls of the clamping member. The clamping member includes a first clamping member and a second clamping member disposed on one side of the first clamping member. The thickness of the first clamping member is greater than that of the second clamping member, and the inner side wall of the clamping member is stepped to facilitate restricting the sliding latch. In the sliding latch, two limiting clamping members are symmetrically disposed on the driving rod, and each limiting clamping member includes a first limiting clamping member and a second limiting clamping member sequentially disposed on one side of the driving rod. The length between the first limiting clamping members of the two limiting clamping members is less than the length of the first baffle, and the length between the second limiting clamping members of the two limiting clamping members is less than the length of the bottom wall body. Thus, when the second limiting clamping member moves to the bottom wall body and the first limiting clamping member moves to the first baffle, the second limiting clamping member and the second limiting clamping member are respectively blocked by the bottom wall body and the first baffle to achieve unlocking of the latch assembly. When separating the base from the caster assembly, press the driving button with the driving rod received in the button through hole, so that the sliding latch slides along the installation through hole, and the first limiting clamping member corresponds to the first baffle, the second limiting clamping member corresponds to the bottom wall body, and a stepped structure is formed between the first limiting clamping member and the first baffle to facilitate the insertion or separation between the base and the caster assembly. It can be seen from this that the structure of the stable and quick-release caster bracket is reasonable, ensuring the stability of the insertion or separation between the base and the caster assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of the stable and quick-release caster bracket provided by the present utility model.

[0017] Figure 2 is Figure 1 a schematic cross-sectional structural diagram of the stable and quick-release caster bracket.

[0018] Figure 3 is Figure 1 a schematic exploded structural diagram of the stable and quick-release caster bracket.

[0019] Figure 4 The Figure 3 structural schematic diagram of the base in the stable and quick-release caster bracket.

[0020] Figure 5 The Figure 4 structural schematic diagram of the base for installing the sliding buckle member.

[0021] Figure 6 The Figure 1 structural schematic diagram of the pressing plate in the stable and quick-release caster bracket.

[0022] Figure 7 The Figure 1 structural schematic diagram of the caster connecting seat in the stable and quick-release caster bracket.

[0023] Figure 8 The Figure 1 structural schematic diagram of the sliding buckle member in the stable and quick-release caster bracket. Detailed implementation manners

[0024] The following further elaborates on the specific embodiments of the present utility model. It should be understood that the description of the embodiments of the present utility model herein does not limit the protection scope of the present utility model.

[0025] As Figures 1 to 8 shown, it is the structural schematic diagram of the stable and quick-release caster bracket provided by the present utility model. The stable and quick-release caster bracket includes a base 10 for connecting a luggage case (not shown in the figure), a caster assembly 20 disposed on the base 10, and a locking assembly 30 disposed between the base 10 and the caster assembly 20. The stable and quick-release caster bracket further includes some other functional modules, such as an assembly component, etc., which should be well-known technologies to those skilled in the art and will not be elaborated in detail herein one by one.

[0026] The base 10 includes a base main body 11, a mounting seat 12 disposed on the base main body 11, a receiving cavity 13 disposed on the mounting seat 12, a locking limit assembly 14 disposed in the receiving cavity 13, a button through hole 15 disposed on the side wall of the mounting seat 12 and communicating with the receiving cavity 13, two symmetrically disposed plug-in mounting units 16 in the receiving cavity 13, a pressing plate 17 disposed on the locking limit assembly 14, a positioning groove unit 18 disposed on the mounting seat 12 and received in the receiving cavity 13, and a reinforcing member 19 disposed between the base main body 11 and the mounting seat 12.

[0027] The base main body 11 is used for connecting to the installation position of the luggage case, and the base main body 11 can protect the installation position of the luggage case. The base main body 12 is a prior art and will not be elaborated herein.

[0028] The mounting base 12 is used to mount the caster assembly 20 and the latch assembly 30 to realize the connection between the base 10 and the caster assembly 20. The outer contour shape of the mounting base 12 can be set according to user requirements. The mounting base 12 is a prior art and will not be elaborated here.

[0029] The accommodating cavity 13 includes an accommodating cavity main body 131, a bottom wall 132 disposed within the accommodating cavity main body 131, and two insertion through holes 133 symmetrically disposed on the bottom wall 132.

[0030] The bottom wall 132 includes a bottom wall main body 1321 fixedly connected to the side wall of the mounting base 12, a first baffle 1322 and a second baffle 1323 sequentially disposed at one end of the bottom wall main body 1321 facing the insertion through hole 133. The bottom wall main body 1321 and the second baffle 1323 are both connected to the side wall of the mounting base 12.

[0031] The first baffle 1322 and the second baffle 1323 are both disposed between the two insertion through holes 133. The distance between the two side edges of the first baffle 1322 facing the two insertion through holes 133 is greater than the distance between the two side edges of the second baffle 1323 facing the two insertion through holes 133, that is, the connection position of the first baffle 1322 and the second baffle 1323 is stepped. The first baffle 1322, the second baffle 1323, and the insertion through hole 133 are all matched with the caster assembly 20 and the latch assembly 30. Therefore, the first baffle 1322, the second baffle 1323, and the insertion through hole 133 will be described in detail in combination with the caster assembly 20 and the latch assembly 30.

[0032] The latch limiting component 14 includes a threaded tube 141 fixedly connected within the accommodating cavity 13 and a screw 142 screwed onto the threaded tube 141. The threaded tube 141 is used to fix the screw 142 and fix the pressing plate 17 through the screw 142. The pressing plate 17 limits the position of the latch assembly 30. Moreover, the threaded tube 141 can also be used to guide the sliding of the latch assembly 30 within the accommodating cavity 13 to realize the locking or unlocking between the caster assembly 20 and the base 10 by the latch assembly 30. The threaded tube 141 and the screw 142 are prior arts and will not be elaborated here.

[0033] The button through hole 15 is disposed on the side wall of the mounting base 12 and communicates with the inside of the accommodating cavity 13, so that one end of the following sliding latch member 31 protrudes outside the base 10, so that the following sliding latch member 31 can be driven outside the base 10.

[0034] The plug-in mounting unit 16 includes at least two plug-in members 161 disposed on the side wall of the mounting base 12 and corresponding to the plug-in through holes 133, and at least one plug-in groove 162 disposed on the side wall of the mounting base 12 and corresponding to the plug-in through holes 133. The plug-in through holes 133 are used for plugging and mounting the caster assembly 20. The plug-in members 161 and the plug-in through holes 133 are used to position the caster assembly 20, facilitating the assembly between the base 10 and the caster assembly 20. The plug-in through holes 133, the plug-in members 161, and the plug-in grooves 162 will be described in detail in conjunction with the caster assembly 20.

[0035] The pressing plate 17 includes a pressing plate body 171, a pressing plate positioning member 172 disposed at one end of the pressing plate body 171, and a pressing plate mounting through hole 173 disposed on the pressing plate body 171. The mounting through hole 173 is used for passing through the screw 142, thereby fixing the pressing plate 17 to the threaded tube 141. The pressing plate 17 abuts against one side of the locking assembly 30, restricting the position of the locking assembly 30 within the accommodating cavity 13.

[0036] The outer contour of the pressing plate body 171 is the same as the gap contour between the following two clamping members 212, so as to completely restrict the locking assembly 30 within the accommodating cavity 13. Therefore, the pressing plate body 171 will be described in detail in conjunction with the locking assembly 30.

[0037] The positioning groove unit 18 includes a spring positioning groove 181 disposed on the mounting base 12 and accommodated within the accommodating cavity 13, and a pressing plate positioning groove 182 disposed at the end of the spring positioning groove 181 facing away from the caster assembly 20. The outer contour of the positioning groove unit 18 is in a "convex" shape. The length of the pressing plate positioning groove 182 is greater than the length of the spring positioning groove 181. The pressing plate positioning groove 182 is disposed at the top of the spring positioning groove 181. One end of the pressing plate 17 is inserted into the pressing plate positioning groove 182, that is, the positions of the spring positioning groove 181 and the pressing plate positioning groove 182 are stepped. The length of the pressing plate positioning member 172 is equal to the length of the pressing plate positioning groove 182. When the pressing plate positioning member 172 in the pressing plate 17 is inserted into the pressing plate positioning groove 182, the pressing plate positioning member 172 abuts against the connection position between the pressing plate positioning groove 182 and the spring positioning groove 181. The pressing plate 17 closes one side of the spring positioning groove 181, improving the stability of the following spring 32 within the spring positioning groove 181.

[0038] The reinforcing member 19 is disposed around the connection position between the base body 11 and the mounting seat 12 to strengthen the connection between the base body 11 and the mounting seat 12. The reinforcing member 19 is a prior art and will not be elaborated herein.

[0039] The caster assembly 20 includes a caster connection seat 21 inserted into the base 10 and a caster frame 22 disposed on the caster connection seat 21.

[0040] The caster connection seat 21 includes a connection seat main body 211, two clamping members 212 symmetrically disposed on the connection seat main body 211 and inserted into the plugging through holes 133, two clamping units 213 respectively disposed on the inner side walls of the clamping members 212, and two guiding units 214 respectively disposed on the outer side walls of the clamping members 212.

[0041] The connection seat main body 211 is used to connect the caster frame 22 and connect the caster frame 22 with the caster connection seat 21. The connection seat main body 211 is a prior art and will not be elaborated herein.

[0042] The two clamping members 212 are symmetrically disposed on the connection seat main body 211. The outer contour shape of the clamping member 212 is the same as the outer contour shape of the plugging through hole 133, so that the clamping member 212 can be inserted into the plugging through hole 133.

[0043] The clamping member 212 includes a first clamping member 2121 and a second clamping member 2122 disposed on one side of the first clamping member 2121. The thickness of the first clamping member 2121 is greater than the thickness of the second clamping member 2122. The inner side wall of the clamping member 212 is stepped, that is, the connection position between the first clamping member and the second clamping member is stepped. It can be imagined that the gap contour between the two clamping members 212 is in a "convex" shape, the outer contour of the pressing plate 17 is the same as the gap contour between the two clamping members 212, and the outer contour of the pressing plate 17 is also in a "convex" shape, thereby restricting the position of the pressing plate 17 between the two clamping members 212.

[0044] The overall contour between the first baffle 1322 and the second baffle 1323 is the same as the contour shape between the two clamping members 212. The gap between the second clamping members 2122 of the two clamping members 212 is equal to the length of the first baffle 1322, and the gap between the first clamping members 2121 of the two clamping members 212 is equal to the length of the second baffle 1323. Thus, the first baffle 1322 and the second baffle 1323 are stably installed in the gap between the two clamping members 212 to ensure the assembly position of the caster connection seat 21.

[0045] Each of the clamping units 213 includes a first positioning groove 2131 provided on the inner side wall of the first clamping member 2121 and a second positioning groove 2132 provided on the inner side wall of the second clamping member 2122. The clamping unit 213 is used to limit the position of the following sliding buckle member 31 to realize the connection between the caster assembly 20 and the base 10. Each of the clamping members 212 is provided with the clamping unit 213 on the side facing the other clamping member 212, that is, the position of the following sliding buckle member 31 is limited between the two clamping members 212.

[0046] Each of the guiding units 214 includes at least two guiding grooves 2141 provided on the outer side wall of the clamping member 212 and at least one guiding protrusion 2142 provided on the outer side wall of the clamping member 212. When the caster assembly 20 is installed on the base 10, each of the guiding units 214 corresponds to one of the plug-in mounting units 16. Each of the plug-in members 161 corresponds to one of the guiding grooves 2141, and the plug-in slot 162 corresponds to the guiding protrusion 2142 to realize the insertion of the clamping member 212 into the plug-in mounting unit 16.

[0047] One end of the caster frame 22 is connected to the caster connecting seat 21, and the other end of the caster frame 22 is connected to a pulley (not shown in the figure). The connection structure between the caster frame 22 and the caster connecting seat 21 and the connection structure between the caster frame 22 and the pulley are both prior arts and will not be described in detail here.

[0048] The locking component 30 includes a sliding buckle member 31 inserted into the mounting seat 12 and a spring 32 provided at one end of the sliding buckle member 31.

[0049] The sliding buckle member 31 includes a driving rod 311, two limiting clamping members 312 symmetrically arranged on both sides of the driving rod 311, a spring accommodating groove 313 provided at one end of the driving rod 311, a mounting through hole 314 provided on the driving rod 311, a spring positioning member 315 provided in the spring accommodating groove 313, and a driving button 316 provided at one end of the driving rod 311.

[0050] Each of the limiting clamping members 312 includes a first limiting clamping member 3121 and a second limiting clamping member 3122 that are sequentially arranged on one side of the driving rod 311. The first limiting clamping member 3121 and the second limiting clamping member 3122 cooperate with the first positioning groove 2131 in the first clamping member 2121 and the second positioning groove 2132 in the second clamping member 2122. When the base 10 is connected to the caster assembly 20, the first limiting clamping member 3121 and the second limiting clamping member 3122 respectively correspond to the first positioning groove 2131 in the first clamping member 2121 and the second positioning groove 2132 in the second clamping member 2122. The connection positions between the first limiting clamping member 3121 and the second limiting clamping member 3122, and the connection positions between the first clamping member 2121 and the second clamping member 2122 are both stepped, so that the cooperation between the first limiting clamping member 3121, the second limiting clamping member 3122 and the first clamping member 2121, the second clamping member 2122 is stable.

[0051] In addition, the length between the second limiting clamping members 3122 among the two limiting clamping members 312 is greater than the length of the first baffle 1322, and the length between the first limiting clamping members 3121 among the two limiting clamping members 312 is greater than the length of the second baffle 1323. Thus, when the first limiting clamping member 3121 moves to the second baffle 1323 and the second limiting clamping member 3122 moves to the first baffle 1322, both the first limiting clamping member 3121 and the second limiting clamping member 3122 can be limited.

[0052] The length between the first limiting clamping members 3121 among the two limiting clamping members 312 is less than the length of the first baffle 1322, and the length between the second limiting clamping members 3122 among the two limiting clamping members 312 is less than the length of the bottom wall main body 1321. Thus, when the second limiting clamping member 3122 moves to the bottom wall main body 1321 and the first limiting clamping member 3121 moves to the first baffle 1322, the second limiting clamping member 3122 and the second limiting clamping member 3122 are respectively blocked by the bottom wall main body 1321 and the first baffle 1322 to realize the unlocking of the locking component 30.

[0053] The spring receiving groove 313 receives the spring 32 to make the position of the spring 32 stable at one end of the sliding clamping member 31, so that the sliding clamping member 31 is stable during the sliding process. In this embodiment, the outer contour of the spring receiving groove 313 is an inverted U shape, and the spring limiting baffle 16 can be received in the spring receiving groove 313. When driving the sliding clamping member 31 to slide, the sliding clamping member 31 can slide along the spring receiving groove 313.

[0054] The installation through-hole 314 is used for inserting the threaded tube 141. The outer diameter of the threaded tube 141 is smaller than the length of the installation through-hole 314. It can be imagined that the threaded tube 141 can guide the sliding buckle 31 to slide and limit the position of the sliding buckle 31 on the base 10.

[0055] The spring positioning member 315 is used for inserting one end of the spring 32 to limit the position of the spring 32 on the sliding buckle 31.

[0056] When the sliding buckle 31 is installed on the base 10, the driving button 316 is inserted into the button through-hole 15, so that the user can drive the sliding buckle 31 to slide through the driving button 316 to control the connection or separation between the base 10 and the caster assembly 20.

[0057] One end of the spring 32 is accommodated in the spring positioning groove 181, and the other end of the spring 32 is sleeved on the spring positioning member 315, thereby limiting the position of the spring 32. When the pressing plate 17 is installed in the accommodating cavity 13, one end of the pressing plate 17 is inserted into the pressing plate positioning groove 182, so that the pressing plate 17 closes one side of the spring positioning groove 181, limiting the position of the spring 32 accommodated in the spring positioning groove 181, and the spring 32 drives the sliding buckle 31 to slide by its own elasticity. The spring 32 is a prior art and will not be elaborated here.

[0058] When the base 10 and the caster assembly 20 are connected together, the spring 32 in the locking assembly 30 uses its own elastic force to push the sliding buckle 31 to slide. The first limiting clamping member 3121 and the second limiting clamping member 3122 in the sliding buckle 31 are inserted into the first positioning groove 2131 of the first clamping member 2121 and the second positioning groove 2132 in the second clamping member 2122, so that the position between the base 10 and the caster assembly 20 is fixed.

[0059] When the base 10 is separated from the caster assembly 20, the driving button 316 that abuts against the driving rod 311 and is received in the button through hole 15 is pressed, so that the sliding latch member 31 slides along the mounting through hole 314, and the first limiting and clamping member 3121 corresponds to the first baffle 1322, and the second limiting and clamping member 3122 corresponds to the bottom wall main body 1321. Moreover, a stepped structure is formed between the first limiting and clamping member 3121 and the first baffle 1322, so as to facilitate the insertion or separation between the base 10 and the caster assembly 20. And the first limiting and clamping member 3121, the second limiting and clamping member 3122 are separated from the first positioning groove 2131 of the first clamping member 2121 and the second positioning groove 2132 in the second clamping member 2122, and the sliding latch member 31 is separated from the caster connecting seat 24, realizing the disassembly between the base 10 and the caster assembly 20.

[0060] Compared with the prior art, the stable and quick-release caster bracket provided by the utility model improves the positions of the caster assembly 20 and the latch assembly 30 on the base 10 through the cooperation of the accommodation cavity 13 in the base 10 with the caster connecting seat 21 in the caster assembly 20 and the sliding latch member 31 in the latch assembly 30. The accommodation cavity 13 includes an accommodation cavity main body 131, a bottom wall 132 arranged in the accommodation cavity main body 131, and two insertion through holes 133 symmetrically arranged on the bottom wall 132. The bottom wall 132 cooperates with the caster connecting seat 21 and the sliding latch member 31 through a bottom wall main body 1321, a first baffle 1322, and a second baffle 1323. A clamping member 212 on the connecting seat main body 211 of the caster connecting seat 21 and inserted into the insertion through hole 133, and two clamping units 213 respectively arranged on the inner side walls of the clamping member 212. The clamping member 212 includes a first clamping member 2121 and a second clamping member 2122 arranged on one side of the first clamping member 2121. The thickness of the first clamping member 2121 is greater than the thickness of the second clamping member 2122, and the inner side wall of the clamping member 212 is stepped to facilitate the restriction of the sliding latch member 31. Two limit clamping members 312 in the sliding latch member 31 are symmetrically arranged on the driving rod 311, and each limit clamping member 312 includes a first limit clamping member 3121 and a second limit clamping member 3122 sequentially arranged on one side of the driving rod 311. The length between the first limit clamping members 3121 in the two limit clamping members 312 is less than the length of the first baffle 1322, and the length between the second limit clamping members 3122 in the two limit clamping members 312 is less than the length of the bottom wall main body 1321. Thus, when the second limit clamping member 3122 moves to the bottom wall main body 1321 and the first limit clamping member 3121 moves to the first baffle 1322, the second limit clamping member 3122 and the second limit clamping member 3122 are respectively blocked by the bottom wall main body 1321 and the first baffle 1322 to achieve the unlocking of the latch assembly 30. When separating the base 10 from the caster assembly 20, the driving button 316 of the driving rod 311 accommodated in the button through hole 15 is pushed against, so that the sliding latch member 31 slides along the installation through hole 314, and the first limit clamping member 3121 corresponds to the first baffle 1322, the second limit clamping member 3122 corresponds to the bottom wall main body 1321, and a stepped structure is formed between the first limit clamping member 3121 and the first baffle 1322 to facilitate the insertion or separation between the base 10 and the caster assembly 20. It can be seen from this that the structure of the stable and quick-release caster bracket is reasonable, ensuring the stability of the insertion or separation between the base 10 and the caster assembly 20.

[0061] The above are only the preferred embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements or improvements within the spirit of the present utility model are all covered within the scope of the claims of the present utility model.

Claims

1. A stable quick-release caster frame, characterized in that: The stable quick-release caster frame includes a base for connecting a bag, a caster assembly arranged on the base, a lock assembly arranged between the base and the caster assembly, the base includes a base body, a mounting seat arranged on the base body, a receiving cavity arranged on the mounting seat, a lock limit assembly arranged in the receiving cavity, a button through hole arranged on the side wall of the mounting seat and connected to the receiving cavity, two plug-in installation units symmetrically arranged in the receiving cavity, a pressure plate arranged on the lock limit assembly, a positioning groove unit arranged on the mounting seat and received in the receiving cavity, and the receiving cavity includes a receiving cavity body. A bottom wall arranged in the accommodating cavity body, and two plug-in through holes symmetrically arranged on the bottom wall, the bottom wall includes a bottom wall body fixedly connected to the side wall of the mounting seat, a first baffle and a second baffle arranged in sequence on one end of the bottom wall body facing the plug-in through hole, the caster assembly includes a caster connecting seat inserted on the base, a caster frame arranged on the caster connecting seat, the caster connecting seat includes a connecting seat body, two clips symmetrically arranged on the connecting seat body and inserted in the plug-in through holes, two clip units respectively arranged on the inner side walls of the clips, the clips include a first clip, and a clip arranged on the first clip The second clamping piece on one side of the connecting piece, the inner side wall of the clamping piece is stepped, the locking assembly includes a sliding clamping piece inserted on the mounting seat, and a spring arranged at one end of the sliding clamping piece, the sliding clamping piece includes a driving rod, two limiting clamping pieces symmetrically arranged on both sides of the driving rod, a spring accommodating groove arranged at one end of the driving rod, a mounting through hole arranged on the driving rod, a spring positioning piece arranged in the spring accommodating groove, and a driving button arranged at one end of the driving rod, each of the limiting clamping pieces includes a first limiting clamping piece and a second limiting clamping piece which are sequentially arranged on one side of the driving rod, and the two limiting clamping pieces The length between the second limit clips in the positioning clips is greater than the length of the first baffle, the length between the first limit clips in the two limit clips is greater than the length of the second baffle, the length between the first limit clips in the two limit clips is less than the length of the first baffle, and the length between the second limit clips in the two limit clips is less than the length of the bottom wall body. When the base is separated from the caster assembly, the first limit clip corresponds to the first baffle, the second limit clip corresponds to the bottom wall body, and a step-like structure is formed between the first limit clip and the first baffle to facilitate the connection or separation between the base and the caster assembly.

2. The stable quick-release caster frame according to claim 1, characterized in that: The base further includes a reinforcement member disposed between the base body and the mounting seat.

3. The stable quick-release caster frame according to claim 1, characterized in that: The plug-in installation unit includes at least two plug-in components arranged on the side wall of the installation seat and corresponding to the plug-in through holes, and at least one plug-in slot arranged on the side wall of the installation seat and corresponding to the plug-in through hole.

4. The stable quick-release caster frame according to claim 1, characterized in that: The pressing plate comprises a pressing plate body, a pressing plate positioning member arranged at one end of the pressing plate body, and a pressing plate mounting through hole arranged on the pressing plate body.

5. The stable quick-release caster frame according to claim 1, characterized in that: The positioning groove unit includes a spring positioning groove arranged on the mounting seat and accommodated in the accommodating cavity, and a pressure plate positioning groove arranged at one end of the spring positioning groove facing away from the caster assembly, the length of the pressure plate positioning groove is greater than the length of the spring positioning groove, and the pressure plate positioning groove is arranged on the top of the spring positioning groove.

6. The stable quick-release caster frame according to claim 1, characterized in that: The caster connection seat also includes two guide units respectively arranged on the outer side walls of the clamping member, and each of the guide units includes at least two guide grooves arranged on the outer side wall of the clamping member, and at least one guide protrusion arranged on the outer side wall of the clamping member.

7. The stable quick-release caster frame according to claim 1, characterized in that: Each of the clamping units includes a first positioning groove arranged on the inner side wall of the first clamping component, and a second positioning groove arranged on the inner side wall of the second clamping component.

8. The stable quick-release caster frame according to claim 1, characterized in that: The locking and limiting assembly includes a threaded tube fixedly connected to the accommodating cavity and a screw threadedly connected to the threaded tube.

9. The stable quick-release caster frame according to claim 8, characterized in that: The outer diameter of the threaded tube is smaller than the length of the mounting through hole.

10. The stable quick-release caster frame according to claim 1, characterized in that: The gap between the second clamping parts of the two clamping parts is equal to the length of the first baffle plate, and the gap between the first clamping parts of the two clamping parts is equal to the length of the second baffle plate.

Images