A child fence with self-locking function

Abstract

The application discloses a child fence with a self-locking function, which comprises a top cover, an inner slide rod installed below the top cover, a cylindrical accommodating cavity arranged on the inner slide rod, first slide grooves arranged on both sides of the inner slide rod and communicated with the cylindrical accommodating cavity, an outer slide rod rotatably sleeved on the inner slide rod, second slide grooves arranged on both sides of the outer slide rod and corresponding to the first slide grooves in position, a limiting rod arranged in the cylindrical accommodating cavity and outwardly extended from both ends of the limiting rod along the first slide grooves and the second slide grooves, the limiting rod being movable in the first slide grooves and the second slide grooves, a sliding seat slidably sleeved on the outer slide rod, the limiting rod being clamped to the sliding seat at both ends, a knob installed in the top cover, the knob being clamped to the top cover and the outer slide rod, the knob being movable up and down and rotatable relative to the top cover so as to be located at an unlocking position or a locking position, and a connecting rod assembly hingedly connected to the top cover and the sliding seat.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of protective articles, and more particularly relates to a child fence with a self-locking function. BACKGROUND

[0002] At present, most of the child fences are made of existing tent support skeletons, but such support skeletons do not meet the use requirements of child articles, and the tent support skeletons in the prior art have the following defects when applied to child fences: first, they cannot be automatically locked, and if an upward force is applied to the inner support rod when a child is inside the fence, the support skeleton may be folded, which may cause harm to the child. Second, when such tent skeletons have the function of being automatically locked when being unfolded, and can only be folded after being manually unlocked, but this locking method can only realize automatic locking during the switching from folding to unfolding of the tent skeleton, and does not allow users to freely switch between the locked and unlocked states when unfolding the skeleton, so that it is not so convenient and flexible to use. SUMMARY

[0003] The main purpose of the present application is to provide a child fence with a self-locking function, which can be automatically locked when unfolded and allows users to freely switch between the locked and unlocked states.

[0004] According to a first aspect of the present application, a child fence with a self-locking function is provided, comprising:

[0005] a top cover;

[0006] an inner slide rod, which is installed below the top cover, the inner slide rod being provided with a cylindrical accommodating cavity, and the inner slide rod being provided with first slide grooves on both sides of the cylindrical accommodating cavity;

[0007] an outer slide rod, which is rotatably sleeved on the inner slide rod, the outer slide rod being provided with second slide grooves on both sides of the outer slide rod, the second slide grooves corresponding in position to the first slide grooves;

[0008] a limiting rod, which is arranged in the cylindrical accommodating cavity, and both ends of the limiting rod respectively extend outward along the first slide grooves and the second slide grooves, the limiting rod being movable in the first slide grooves and the second slide grooves;

[0009] a sliding seat, which is slidably sleeved on the outer slide rod, and both ends of the limiting rod are respectively clamped with the sliding seat;

[0010] a knob, which is installed in the top cover, the knob being clamped with the top cover and the outer slide rod, respectively, the knob being movable up and down and rotatable relative to the top cover, so that the knob is located in an unlocked position or a locked position;

[0011] A connecting rod assembly is hingedly connected to the top cover and the sliding base, respectively.

[0012] In a specific embodiment of the present application, the second sliding groove comprises a vertical segment and an inclined segment, and the vertical segment and the inclined segment form an angle so that the limiting rod can slide along the inclined surface in the inclined segment when moving upward or downward, and the directions of the inclined segments of the two second sliding grooves are opposite so that the outer sliding rod can rotate in the corresponding direction.

[0013] In a specific embodiment of the present application, the top cover is provided with a first limiting groove on both sides, and a first boss is arranged in the middle of the first limiting groove, the first boss comprises a first inclined surface and a first steep surface, and the knob is provided with a limiting boss matched with the first boss, when the limiting boss is located on one side of the first inclined surface, the knob has a first state located at the unlocking position, and when the limiting boss is located on one side of the first steep surface, the knob has a second state located at the locking position.

[0014] In a specific embodiment of the present application, the outer sliding rod is provided with a second limiting groove on both sides of the upper end, and a second boss is arranged in the middle of the second limiting groove, the second boss comprises a second inclined surface and a second steep surface, and the bottom of the knob is provided with two limiting columns matched with the second boss, when the limiting column is located on one side of the second inclined surface, the knob is movably connected with the outer sliding rod, and when the limiting column is located on one side of the second steep surface, the knob is fixedly connected with the outer sliding rod.

[0015] In a specific embodiment of the present application, the inside of the limiting column is provided with an avoidance groove for avoiding the second boss.

[0016] In a specific embodiment of the present application, the cylindrical accommodating cavity is provided with a first spring, one end of the first spring is in abutment with the bottom of the cylindrical accommodating cavity, and the other end is in abutment with the limiting rod.

[0017] In a specific embodiment of the present application, the upper end of the inner sliding rod is provided with a mounting portion fixedly connected with the top cover, a second spring is arranged between the knob and the mounting portion, and the two ends of the second spring are in abutment with the knob and the mounting portion, respectively.

[0018] In a specific embodiment of the present application, the connecting rod assembly comprises an upper support rod and a lower support rod, the upper support rod is hingedly connected with the top cover through an upper support rod front connecting sleeve, and the lower support rod is hingedly connected with the sliding base through a lower support rod front connecting sleeve.

[0019] In a specific embodiment of the present application, the upper support rod middle part is sleeved with an upper support rod middle connecting sleeve, the upper support rod rear end is provided with an upper support rod rear connecting sleeve, and the lower support rod end away from the sliding seat is provided with a lower support rod rear connecting sleeve, and the upper support rod middle connecting sleeve is hinged with the lower support rod rear connecting sleeve.

[0020] In a specific embodiment of the present application, the connecting rod assembly further comprises a vertical rod, one end of the vertical rod is hinged with the upper support rod rear connecting sleeve through a vertical rod upper sleeve, the other end of the vertical rod is provided with a vertical rod lower sleeve, and the vertical rod lower sleeve is provided with a support foot pad.

[0021] The above technical solutions of the present application have at least one of the following advantages or beneficial effects:

[0022] The child fence with the self-locking structure is provided with knobs on the top cover and is clamped with the top cover and the outer sliding rod, when the fence is opened, the limiting rod slides downward to the bottom along the first sliding groove and the second sliding groove, the outer sliding rod drives the knob to rotate, so that the knob is clamped from the unlocking position of the top cover to the locking position of the top cover, automatic locking is realized when the child fence is opened, which can effectively prevent accidents caused by the sudden folding of the supporting framework; the knob can move up and down and rotate relative to the top cover, in the opened state, the knob is pressed and rotated from the locking position to the unlocking position, so that the locking and unlocking states are freely switched, and in the unlocking state, the user can fold the child fence, the structure is simple, and the use is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described below in combination with the drawings and embodiments;

[0024] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0025] Figure 2 is an exploded view of an embodiment of the present application;

[0026] Figure 3 is a sectional view of an embodiment of the present application;

[0027] Figure 4 is Figure 3 is an enlarged schematic diagram of the middle circle A;

[0028] Figure 5 is a structural schematic diagram of cooperation between the knob and the top cover in an embodiment of the present application;

[0029] Figure 6 is a structural schematic diagram of cooperation between the knob and the outer sliding rod in an embodiment of the present application;

[0030] Figure 7 is a structural schematic diagram of the top cover in an embodiment of the present application;

[0031] Figure 8 is a structural schematic diagram of an inner slide rod in one embodiment of the present application;

[0032] Figure 9 is a structural schematic diagram of an outer slide rod in one embodiment of the present application;

[0033] Figure 10 is a structural schematic diagram of a knob in one embodiment of the present application. DETAILED DESCRIPTION

[0034] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters designate the same or like components throughout the drawing figures. The embodiments described below are presented by way of example only and are not intended as limitations on the present application.

[0035] In the description of the present application, it is necessary to understand that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0036] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more. Greater than, less than, more than, etc. are understood as not including the number itself, and above, below, etc. are understood as including the number itself. If it is described as first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0037] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features.

[0038] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be a fixed connection or a movable connection, or a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or an internal communication between two elements, an indirect communication or an interaction relationship between two elements.

[0039] The disclosure below provides many different implementations or examples to implement different aspects of the present application.

[0040] Referring to Figures 1 to 10 As shown in the drawings, a child fence with self-locking function is provided, comprising:

[0041] a top cover 1;

[0042] an inner slide rod 3, which is installed below the top cover 1, and is provided with a cylindrical accommodating cavity 301, and is provided with a first sliding groove on both sides and communicated with the cylindrical accommodating cavity 301;

[0043] an outer slide rod 4, which is rotatably sleeved on the inner slide rod 3, and is provided with a second sliding groove 401 on both sides and corresponding to the position of the first sliding groove;

[0044] a limiting rod 5, which is arranged in the cylindrical accommodating cavity 301, and the two ends of the limiting rod 5 respectively extend outward along the first sliding groove and the second sliding groove 401, and the limiting rod 5 can move in the first sliding groove and the second sliding groove 401;

[0045] a sliding seat 6, which is slidably sleeved on the outer slide rod 4, and the two ends of the limiting rod 5 are respectively clamped with the sliding seat 6;

[0046] a knob 2, which is installed in the top cover 1, and is clamped with the top cover 1 and the outer slide rod 4, and can move up and down and rotate relative to the top cover 1, so that the knob 2 is located in the unlocking position or the locking position;

[0047] a connecting rod assembly 9, which is hingedly connected with the top cover 1 and the sliding seat 6.

[0048] In this embodiment, the child fence with self-locking structure is provided with the knob 2 clamped with the top cover 1 and the outer slide rod 4 on the top cover 1, when the child fence is opened, the limiting rod 5 slides downward to the bottom along the first sliding groove and the second sliding groove 401, the outer slide rod 4 drives the knob 2 to rotate, so that it is clamped from the unlocking position of the top cover 1 to the locking position of the top cover 1, realizing automatic locking when the child fence is opened, which can effectively prevent the child fence from suddenly folding and causing accidental injury to people; and the knob 2 can move up and down and rotate relative to the top cover 1, in the opened state, the knob 2 is pressed downward to rotate from the locking position to the unlocking position, realizing free switching between the locking and unlocking states, and in the unlocking state, the user can fold the child fence, which is simple in structure and convenient to use.

[0049] Preferably, the knob 2 is used for convenient user operation, which is not limited to the form of the knob 2, for example, a sliding switch, a key and other forms capable of achieving the same effect as the knob 2 can be used, and corresponding settings can be made according to actual conditions.

[0050] Further, the top cover 1 and the sliding seat 6 are provided with a plurality of mounting positions hinged with the connecting rod assembly 9, and the number of the mounting positions can be set according to actual conditions. In the embodiment, the top cover 1 and the sliding seat 6 are provided with six mounting positions, and the six mounting positions are arranged in an array, so that the stress between the connecting rod assemblies 9 is uniform, and the stability of the child fence is improved.

[0051] Specifically, the outer sliding rod 4 and the knob 2 are provided with a first rotation shaft, so that the outer sliding rod 4 and the knob 2 can rotate around the first rotation shaft.

[0052] In an embodiment of the present application, the second sliding groove 401 comprises a vertical section 402 and an inclined section 403, and an angle is formed between the vertical section 402 and the inclined section 403, so that the limiting rod 5 can slide along the inclined surface in the inclined section 403 when moving upward or downward, and the directions of the inclined sections 403 of the two second sliding grooves 401 are opposite, so that the outer sliding rod 4 can rotate in the corresponding direction.

[0053] In the embodiment, the cooperation between the inclined section 403 and the limiting rod 5 can drive the outer sliding rod 4 and the knob 2 to rotate around the first rotation shaft, so that the knob 2 is switched from the unlocking position to the locking position, and the child fence is automatically locked when being opened.

[0054] In an embodiment of the present application, the top cover 1 is provided with a first limiting groove 101 on both sides, the first limiting groove 101 is provided with a first boss 102 in the middle, the first boss 102 comprises a first inclined surface part 103 and a first steep surface part 104, the knob 2 is provided with a limiting boss 201 matched with the first boss 102 on both sides, when the limiting boss 201 is located on one side of the first inclined surface part 103, the knob 2 has a first state located in the unlocking position, and when the limiting boss 201 is located on one side of the first steep surface part 104, the knob 2 has a second state located in the locking position.

[0055] In the embodiment, when the child fence is opened, if the limiting boss 201 is clamped with the first boss 102 on one side of the first steep surface part 104, the knob 2 has the second state located in the locking position, and if the limiting boss 201 is clamped with the first boss 102 on one side of the first inclined surface part 103, the knob 2 has the first state located in the unlocking position.

[0056] In an embodiment of the present application, the outer sliding rod 4 is provided with a second limiting groove 404 on both sides of the upper end, the second limiting groove 404 is provided with a second boss 405 in the middle, the second boss 405 comprises a second inclined surface part 406 and a second steep surface part 407, and the knob 2 is provided with two limiting columns 202 matched with the second boss 405 at the bottom, when the limiting column 202 is located on one side of the second inclined surface part 406, the knob 2 is movably connected with the outer sliding rod 4, and when the limiting column 202 is located on one side of the second steep surface part 407, the knob 2 is fixedly connected with the outer sliding rod 4.

[0057] In the embodiment, when the child fence is unlocked and folded, the limiting column 202 is located at one side of the second inclined surface 406, and the sliding seat 6 is pushed to slide upward, so that the outer sliding rod 4 rotates around the first rotating shaft when the limiting rod 5 slides upward along the inclined section 403 of the second sliding groove 401, the second boss 405 also rotates, and the second inclined surface 406 slides relative to the limiting column 202, and when the limiting rod 5 enters the vertical section 402 of the second sliding groove 401, the limiting column 202 is located at one side of the second steep surface 407, and the knob 2 is fixedly connected with the outer sliding rod 4, so that the knob 2 rotates around the first rotating shaft when the outer sliding rod 4 rotates.

[0058] In an embodiment of the present application, the inside of the limiting column 202 is provided with a position-avoiding groove 203 for the second boss 405. The position-avoiding groove 203 is arranged to smoothly rotate the knob 2 when the second boss 405 matches the position-avoiding groove 203, so as to freely switch the locking position and the unlocking position of the knob 2.

[0059] In an embodiment of the present application, the cylindrical accommodating cavity 301 is provided with the first spring 7, one end of the first spring 7 abuts against the bottom of the cylindrical accommodating cavity 301, and the other end abuts against the limiting rod 5.

[0060] In the embodiment, when the linkage assembly 9 in the folded state loses the external force for folding, the first spring 7 in the compressed state can generate a downward force on the limiting rod 5 to move the limiting rod 5 downward along the first sliding groove and the second sliding groove 401, and the first spring 7 is arranged to facilitate the use of the child fence.

[0061] In an embodiment of the present application, the upper end of the inner sliding rod 3 is provided with a mounting portion 302 fixedly connected with the top cover 1, the second spring 8 is arranged between the knob 2 and the mounting portion 302, and the two ends of the second spring 8 abut against the knob 2 and the mounting portion 302, respectively.

[0062] In the embodiment, the inner sliding rod 3 is fixedly connected between the mounting portion 302 and the top cover 1, the two ends of the second spring 8 abut against the knob 2 and the mounting portion 302, respectively, the knob 2 is released after being pressed and rotated to switch between the unlocking position and the locking position, and the knob 2 can be automatically reset under the upward elastic force of the second spring 8, so that the use is convenient.

[0063] In an embodiment of the present application, the linkage assembly 9 comprises an upper support rod 901 and a lower support rod 902, the upper support rod 901 is hingedly connected with the top cover 1 through an upper support rod front connecting sleeve 903, and the lower support rod 902 is hingedly connected with the sliding seat 6 through a lower support rod front connecting sleeve 905.

[0064] In one embodiment of the present application, the upper support rod 901 is slidably connected with an upper support rod middle connecting sleeve 904 in the middle part of the upper support rod 901, and the rear end of the upper support rod 901 is provided with an upper support rod rear connecting sleeve 908. The distal end of the lower support rod 902 away from the sliding seat 6 is provided with a lower support rod rear connecting sleeve 906, and the upper support rod middle connecting sleeve 904 is hingedly connected with the lower support rod rear connecting sleeve 906.

[0065] In one embodiment of the present application, the connecting rod assembly 9 further comprises a vertical rod 909, one end of the vertical rod 909 being hingedly connected with the upper support rod rear connecting sleeve 908 through a vertical rod upper sleeve 907, and the other end of the vertical rod 909 being provided with a vertical rod lower sleeve 910, and the vertical rod lower sleeve 910 being provided with a support foot pad 911.

[0066] Specifically, the hinged position of the upper support rod front connecting sleeve 903 and the top cover 1 is provided with a second rotating shaft, so that the upper support rod 901 can rotate relative to the top cover 1 about the second rotating shaft; the hinged position of the lower support rod rear connecting sleeve 906 and the upper support rod middle connecting sleeve 904 is provided with a third rotating shaft, so that the lower support rod 902 can rotate relative to the upper support rod 901 about the third rotating shaft; and the hinged position of the lower support rod front connecting sleeve 905 and the sliding seat 6 is provided with a fourth rotating shaft, so that the lower support rod 902 can rotate relative to the sliding seat 6 about the fourth rotating shaft.

[0067] The working principle of the child fence with self-locking function is as follows:

[0068] In the folded state, an external force acts on the upper support rod 901, so that the upper support rod 901 swings inward to an almost vertical position about the second rotating shaft, and at the same time, an external force acts on the lower support rod 902 to swing about the third rotating shaft to approach the upper support rod 901, and the lower support rod 902 swings inward to an almost vertical position about the fourth rotating shaft, so that the upper and lower support rods 902 are folded. The sliding seat 6 is driven by the lower support rod front connecting sleeve 905 to the upper part of the outer sliding rod 4, and since the sliding seat 6 is fixedly connected with the limiting rod 5, the limiting rod 5 will be driven to the upper part of the sliding groove of the outer sliding rod 4, and at the same time, the first spring 7 is pressed, so that the first spring 7 is in a compressed state.

[0069] In the folded state, the limiting column 202 of the knob 2 is located on the first steep surface part 104 of the first protrusion 102 on one side of the second limiting groove 404 of the outer sliding rod 4, and the limiting protrusion 201 of the knob 2 is located on the first inclined surface part 103 of the first protrusion 102 on the other side.

[0070] When the support framework in the folded state loses the external force that causes it to fold, the first spring 7 in the compressed state exerts a downward force on the limiting rod 5, causing the limiting rod 5 to move downward. Since the limiting rod 5 abuts the bottom of the square groove in the sliding seat 6, this causes the sliding seat 6 to also move downward, and the lower support rod 902 hinged to the sliding seat 6 is also driven to gradually move away from the upper support rod 901, causing the upper support rod 901 to swing outward around the second pivot.

[0071] Since the limiting rod 5 is inserted into the first and second sliding grooves 401, the vertical section 402 of the second sliding groove 401 of the outer sliding rod 4 is aligned with the first sliding groove. When the limiting rod 5 slides in the vertical section 402 of the first sliding groove, the outer sliding rod 4 does not produce a rotation, and therefore the second limiting groove 404 at the top of the outer sliding rod 4 does not produce a rotation, and the knob 2 also does not produce a rotation. Since the knob 2 does not produce a rotation in this state, the limiting boss 201 remains on the side of the first inclined surface 103.

[0072] When the child fence is self-locked, the first spring 7 in the compressed state exerts a downward force on the limiting rod 5, causing the limiting rod 5 to continue to move downward, and the sliding seat 6 and the lower support rod 902 also continue to move downward. The upper support rod 901 continues to swing outward around the second pivot.

[0073] The limiting rod 5 slides to the inclined section 403 of the second sliding groove 401, causing the outer sliding rod 4 to rotate around the first pivot, and the second steep surface 407 on one side abuts the limiting post 202 of the knob 2. The rotation of the outer sliding rod 4 drives the knob 2 to also rotate around the first pivot. When the knob 2 rotates around the first pivot, since the limiting boss 201 is on the side of the first inclined surface 103 of the first boss 102, the limiting boss 201 slides along the inclined surface of the first inclined surface 103. During the sliding process, the knob 2 produces a downward displacement and simultaneously presses the second spring 8, causing the second spring 8 to be in a compressed state.

[0074] When the child fence is fully opened and self-locked, the first spring 7 in the compressed state exerts a downward force on the limiting rod 5, causing the limiting rod 5 to move downward until it reaches the end of the first sliding groove of the inner sliding rod 3 and stops moving. At the same time, the limiting rod 5 also slides to the end of the inclined section 403 of the second sliding groove 401 of the outer sliding rod 4. At this time, the sliding seat 6 and the lower support rod 902 also stop moving downward, and the upper support rod 901 also stops swinging outward. At this time, the support framework is in a fully opened state.

[0075] When the limiting rod 5 slides to the end of the inclined section 403 of the second sliding groove 401, the outer sliding rod 4 stops rotating after rotating a certain angle around the first rotating shaft, because the second boss 405 of the outer sliding rod 4 drives the limiting column 202 of the knob 2 to rotate, so that the knob 2 also rotates around the first rotating shaft and then stops at the same angle.

[0076] When the knob 2 rotates around the first rotating shaft, the limiting boss 201 of the knob 2 slides along the side of the first inclined surface part 103, and when the knob 2 rotates a certain angle and then stops, the limiting boss 201 of the knob 2 reaches the side of the first steep surface part 104, and under the upward action of the second spring 8, the knob 2 moves upward to restore its original height.

[0077] When the child fence is in the fully open state, the limiting boss 201 of the knob 2 reaches the side of the first steep surface part 104 and abuts against the steep surface, and the knob 2 cannot rotate unless it is manually unlocked, and the limiting column 202 below the knob 2 also cannot rotate, at this time, the second limiting groove 404 at the top of the outer sliding rod 4 cannot rotate in the opposite direction due to the abutment with the limiting column 202, that is, the direction opposite to the direction of rotation in the opening process. Because the limiting rod 5 is inserted and installed in the first sliding groove and the second sliding groove 401, when the fence is fully open, the end of the first sliding groove is aligned with the end of the inclined section 403 of the second sliding groove 401, and the limiting rod 5 falls in the aligned position of the vertical sections 402 of the two sliding grooves, so that the outer sliding rod 4 cannot rotate, which fixes the limiting rod 5 at the current position, so that the sliding seat 6 is also fixed at the current position, so that the fence cannot be folded, which completes the automatic locking of the child fence.

[0078] When the fence is in the open state and is self-locked, the user unlocking method is:

[0079] Press the knob 2 and keep it pressed, rotate the knob 2 in the opposite direction, that is, the direction opposite to the automatic locking direction, rotate to the end, and then release the knob 2, the knob 2 will rebound to the initial height under the action of the second spring 8, which completes the unlocking operation; the internal structure movement is that the limiting boss 201 of the knob 2 moves out of the side of the first steep surface part 104 when the knob 2 is pressed down, and the limiting column 202 below the knob 2 also moves downward, at this time, the avoiding groove 203 inside the limiting column 202 is just misaligned with the second boss 405, so that the knob 2 can rotate smoothly in the opposite direction.

[0080] The child fence is in the open and unlocked state, and is folded:

[0081] After unlocking, force is applied to the upper support rod 901 and the lower support rod 902, so that the upper support rod 901 and the lower support rod 902 approach each other, the lower support rod 902 swings upward around the third rotating shaft, and the sliding seat 6 moves upward, and since the bottom of the rectangular slot in the sliding seat 6 abuts against the limiting rod 5, the limiting rod 5 is also driven to move upward.

[0082] When the limiting rod 5 slides on the inclined section 403 of the second sliding groove 401, the outer sliding rod 4 generates reverse rotation, that is, the direction opposite to that in the opening process, so that the second limiting groove 404 also generates reverse rotation, and the second inclined surface part 406 of the second boss 405 abuts against the limiting column 202 below the knob 2, and since the knob 2 has reached the end and cannot generate reverse rotation, the limiting column 202 will be elastically bent outward.

[0083] The user continues to apply force to the upper support rod 901 and the lower support rod 902, so that the upper support rod 901 and the lower support rod 902 approach each other, the sliding seat 6 continues to move upward, and therefore the limiting rod 5 also continues to move upward, and when the limiting rod 5 slides on the vertical section 402 of the second sliding groove 401, the vertical section 402 of the second sliding groove 401 will be aligned with the first sliding groove of the inner sliding rod 3, at this time, the outer sliding rod 4 no longer rotates in the reverse direction, and the limiting column 202 below the knob 2 just falls on one side of the second steep surface part 407 of the second boss 405.

[0084] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A child safety playpen with a self-locking function, characterized in that, include: Top cover (1); The inner slide rod (3) is installed below the top cover (1). The inner slide rod (3) is provided with a cylindrical receiving cavity (301). The inner slide rod (3) has first sliding grooves on both sides that communicate with the cylindrical receiving cavity (301). An outer slide rod (4) is rotatably sleeved on the inner slide rod (3). The outer slide rod (4) has a second slide groove (401) on both sides, and the second slide groove (401) corresponds to the position of the first slide groove. A limiting rod (5) is disposed in the cylindrical receiving cavity (301), and the two ends of the limiting rod (5) extend outward along the first slide groove and the second slide groove (401) respectively. The limiting rod (5) can move in the first slide groove and the second slide groove (401). The second slide groove (401) includes a vertical section (402) and an inclined section (403). An angle is formed between the vertical section (402) and the inclined section (403) so that the limiting rod (5) can slide along the inclined surface in the inclined section (403) when moving upward or downward. The inclined sections (403) of the two second slide grooves (401) are in opposite directions so that the outer slide rod (4) can rotate in the corresponding direction. The sliding seat (6) is slidably sleeved on the outer sliding rod (4), and the two ends of the limiting rod (5) are respectively engaged with the sliding seat (6); A knob (2) is installed inside the top cover (1). The knob (2) is engaged with the top cover (1) and the outer slide rod (4) respectively. The knob (2) can move up and down and rotate relative to the top cover (1) to position the knob (2) in the unlocked or locked position. The top cover (1) has first limiting grooves (101) on both sides. The first limiting groove (101) has a first boss (102) in the middle. The first boss (102) includes The knob (2) has a first inclined surface (103) and a first steep surface (104). The knob (2) has a limiting boss (201) on both sides that cooperates with the first boss (102). When the limiting boss (201) is located on one side of the first inclined surface (103), the knob (2) has a first state in the unlocked position. When the limiting boss (201) is located on one side of the first steep surface (104), the knob (2) has a second state in the locked position. Linkage assembly (9), which is hinged to the top cover (1) and the sliding seat (6) respectively; The upper end of the outer slide rod (4) is provided with a second limiting groove (404) on both sides. The second limiting groove (404) is provided with a second boss (405) in the middle. The second boss (405) includes a second inclined part (406) and a second steep part (407). The bottom of the knob (2) is provided with two limiting posts (202) that cooperate with the second boss (405). When the limiting post (202) is located on the side of the second inclined part (406), the knob (2) is movably connected to the outer slide rod (4). When the limiting post (202) is located on the side of the second steep part (407), the knob (2) is fixedly connected to the outer slide rod (4). The inner side of the limiting post (202) is provided with a clearance groove (203) to avoid the second boss (405).

2. The child fence with self-locking function according to claim 1, characterized in that, The cylindrical cavity (301) is provided with a first spring (7), one end of the first spring (7) abuts against the bottom of the cylindrical cavity (301), and the other end abuts against the limiting rod (5).

3. The child fence with self-locking function according to claim 1, characterized in that, The upper end of the inner slide bar (3) is provided with a mounting part (302) that is fixedly connected to the top cover (1). A second spring (8) is provided between the knob (2) and the mounting part (302). The two ends of the second spring (8) abut against the knob (2) and the mounting part (302) respectively.

4. The child fence with self-locking function according to claim 1, characterized in that, The linkage assembly (9) includes an upper support rod (901) and a lower support rod (902). The upper support rod (901) is hinged to the top cover (1) through the upper support rod front connecting sleeve (903), and the lower support rod (902) is hinged to the sliding seat (6) through the lower support rod front connecting sleeve (905).

5. The child fence with self-locking function according to claim 4, characterized in that, The upper support rod (901) is slidably connected to the middle of the upper support rod (904), and the rear end of the upper support rod (901) is provided with the upper support rod rear connecting sleeve (908). The lower support rod (902) is provided with the lower support rod rear connecting sleeve (906) at the end away from the sliding seat (6). The upper support rod middle connecting sleeve (904) and the lower support rod rear connecting sleeve (906) are hinged together.

6. The child fence with self-locking function according to claim 5, characterized in that, The connecting rod assembly (9) also includes a vertical rod (909), one end of which is hinged to the upper support rod rear connecting sleeve (908) via a vertical rod upper sleeve (907), and the other end of which is provided with a vertical rod lower sleeve (910), and a support foot pad (911) is provided on the vertical rod lower sleeve (910).

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