Backrest locking mechanism and child seat equipped with it

Abstract

A backrest locking mechanism (130) adapted for a backrest (120) and a base (110) of a child seat (100), wherein the backrest (120) is removably connected to the base (110), and wherein the backrest locking mechanism (130) comprises: a locking pin (131) arranged on the backrest (120); a locking component (132) arranged on the base (110), wherein a locking hole structure (1321) is formed on the locking component (132), and the locking pin (131) is configured to releasably engage the locking hole structure (1321); and an actuating component (133) movably disposed on the backrest (120) or the base (110), wherein the actuating component (133) drives the locking pin (131) and the locking hole structure (1321) to engage or disengage from one another when the actuating component (133) is actuated.

Description

Field of the InventionThe present invention relates to a backrest locking mechanism and a child seat equipped therewith.BACKGROUND OF THE INVENTIONA child seat is a device that can be arranged to receive a child on a vehicle. In an emergency braking or accident, an outer shell of the child seat may absorb an impact to reduce the impact force acting on the child, and a restraint device of the child seat may restrict movement of the body of the child to prevent injury to the child and thus ensure safety of the child.CN 107 128 220 A discloses a child seat comprising a base unit and a backrest unit arranged at the rear of the base unit, the base unit being slidable and being pivotally arranged below the backrest unit, the child seat having an unfolded and a folded state. The base unit extends in a front-rear direction when the child seat is in the unfolded state, and the base unit slides forward with respect to the backrest unit and folds upward to coincide with the backrest unit when the child car seat is folded.US 2018 / 0 050 615 A1 discloses a child booster seat having a booster seat base and a seat back. The elevation seat base may be folded or folded from a use configuration to a collapsed configuration to improve portability of the elevation seat base. The elevation seat base may include a plurality of seat bottom plates rotatably connected to each other to allow the elevation seat base to be collapsed from a use width to a collapsed width less than the use width. The riser seat base may also be connected to and disconnected from the riser seat back.The child seat typically includes a base, a seat back connected to the base, and a head restraint connected to the seat back. For ease of packaging, transportation, and storage, the seat back may be configured to be detachable from the base, and the child seat further includes a locking mechanism that enables or inhibits detachment of the seat back from the base. However, the structure of the conventional locking mechanism is complicated, and the operation of the conventional locking mechanism is not user-friendly. Therefore, improvement of the conventional lock mechanism is urgent.SUMMARY OF THE INVENTIONIn view of the foregoing, the present invention has an object to provide a seat back locking mechanism including a simple structure and the capability of easily and conveniently arranging and removing a seat back on and from a base, and a child seat provided therewith.This is achieved by a backrest locking mechanism and a child seat equipped therewith according to the independent claims. The dependent claims relate to respective developments and improvements.As will be more clearly understood from the following detailed description, the claimed seat back locking mechanism is adapted for a seat back and a base of a child seat. The seatback is removably connected to the base, and the seatback locking mechanism includes a locking pin, a locking component, and an operating component. The locking pin is arranged on an element, namely the backrest or the base. The locking component is arranged on the other element, namely the backrest or the base. A locking hole structure is formed on the locking component. The locking pin is configured for releasably engaging the locking hole structure. The actuation component is movably disposed on the backrest or the base. The operating component drives the locking pin and the locking hole structure to engage with each other or disengage from each other when the operating component is operated.According to an embodiment of the present invention, a member, namely the locking component or the locking pin, is retractable and extendable.According to an embodiment of the present invention, the actuating component is connected to the element, namely the locking component or the locking pin, and is configured to drive this element, namely the locking component or the locking pin, for retraction or extension.According to an embodiment of the present invention, the actuation component is a pressure component, a sliding component or a rotation component.According to an embodiment of the present invention, the backrest locking mechanism further comprises a restoring component connected to the operating component. The restoring component is elastically deformed when the actuating component is actuated, and the elastically deformed restoring component drives the actuating component for restoring.According to an embodiment of the present invention, the actuating component is displaceable between a first position and a second position. The locking pin and the locking hole structure are engaged with each other when the operating component is disposed in the first position. The operating component drives the lock pin and the lock hole structure to separate from each other when the operating component shifts from the first position to the second position, and the returning component biases the operating component to shift from the second position to the first position.According to an embodiment of the present invention, the locking component is firmly connected to the actuating component and is displaceable together with the actuating component. The locking component includes a locking plate extending perpendicular to a longitudinal direction of the locking pin, and the locking hole structure is formed on the locking plate.According to an embodiment of the present invention, the locking component further includes a link arm fixedly connected to the locking plate and the operating component to be driven by the operating component, and an included angle is formed between the link arm and the locking plate.According to an embodiment of the present invention, a positioning protrusion protrudes from a lateral portion of the operation component, and an end of the returning component covers the positioning protrusion and abuts against the operation component.According to an embodiment of the present invention, a sliding direction of the operating component is parallel to a longitudinal direction of the locking pin, and the restoring component and the locking pin are arranged on two opposite sides of the operating component.According to an embodiment of the present invention, an operation recess is formed at an end of the operation component exposed from the seat back or the base.According to an embodiment of the present invention, a ball head protrudes from an end of the locking pin adjacent to the locking component, and an outer diameter of the ball head is greater than an outer diameter of the locking pin.Further, the claimed child seat includes a base, a seat back, and a seat back locking mechanism. The seat back is removably connected to the base. The seatback locking mechanism includes at least one locking pin, at least one locking component, and at least one operating component. The at least one locking pin is arranged on an element, namely the backrest or the base. The at least one locking component is arranged on the other element, namely the backrest or the base. A locking hole structure is formed on the at least one locking component. The at least one locking pin is configured to releasably engage the locking hole structure. The at least one actuation component is movably arranged on the backrest or the base. The at least one actuation component drives the at least one locking pin and the locking hole structure to engage with each other or disengage from each other when the at least one actuation component is actuated.According to an embodiment of the present invention, at least one locating arm protrudes from a lower end of the backrest. At least one guide slot is formed on the base. The locating arm is at least partially received within the at least one guide slot and slidable relative to the at least one guide slot. The at least one locking pin is arranged on the at least one arrangement arm. The at least one locking component is partially disposed within the at least one guide slot; and the at least one locking pin and the locking hole structure engage each other when the at least one locating arm is at least partially received within the at least one guide slot.According to an embodiment of the present invention, the at least one locking component comprises a connecting arm and a locking plate connected to the connecting arm. An included angle is formed between the link arm and the lock plate. The link arm is slidably disposed on the base. The locking plate is disposed within the at least one guide slot. The locking hole structure is formed on the locking plate, and the at least one locking pin is fixedly connected to the at least one locating arm and protrudes from a lateral wall of the at least one locating arm to engage with the locking hole structure.According to an embodiment of the present invention, at least one slide hole is formed on the base. The at least one actuation component is at least partially received within the at least one sliding hole and slidable relative to the at least one sliding hole, and the at least one actuation component is connected to the link arm.According to an embodiment of the present invention, the backrest locking mechanism further comprises at least one restoring component which is arranged on the base and abuts against the at least one actuating component, and the at least one restoring component is configured to bias the at least one actuating component in order to drive the at least one locking component for displacement in the direction of the at least one locking pin.According to an embodiment of the present invention, the at least one arrangement arm comprises two arrangement arms. The at least one guide slot comprises two guide slots. The at least one locking pin comprises two locking pins. The at least one locking component comprises two locking components. The at least one actuation component comprises two actuation components. Each of the two locking components is at least partially disposed within a corresponding one of the two guide slots. Each of the two locking pins is disposed on a corresponding one of the two locating arms. The at least one reset component comprises only one reset component. The one reset component is an integral structure, and two ends of the one reset component abut against the two operation components, respectively.In summary, according to the present invention, the locking pin and the locking component of the backrest locking mechanism are respectively disposed on the backrest and the base, and the locking hole structure is formed on the locking component and configured to engage with the locking pin. Further, the operating component movably disposed on the backrest and the base drives the locking pin and the locking component to engage with each other or disengage from each other when the operating component is operated. The present invention not only includes a simple structure and enables easy and convenient placement and removal of the seat back on and from the base, but also ensures more reliable placement of the seat back and the base.These and other objects of the present invention will no doubt become apparent to those skilled in the art after reading the following detailed description of the preferred embodiment shown in the various drawings and figures.Brief Descriptions of the DrawingsHereinafter, the invention will be further illustrated by way of example with reference to the accompanying drawings. FIG. 1 is a schematic view of a child seat according to an embodiment of the present invention, FIGS. 2 to 4 are views showing different portions of the child seat according to the embodiment of the present invention, FIG. 5 is a sectional view of the child seat taken along an A-A line shown in FIG. 1 according to the embodiment of the present invention, FIG. 6 is a view showing a detail "B" of the child seat according to the embodiment of the present invention, FIGS. 7 to 10 are views showing a partial structure of a child seat according to various embodiments of the present invention, FIG. 8 is a view showing a partial structure of a child seat according to another embodiment of the present invention, FIG. 9 is a view showing a partial structure of a child seat according to another embodiment of the present invention; and FIG. 10 is a view showing a partial structure of a child seat according to another embodiment of the present invention.Detailed DescriptionIn the following detailed description of the preferred embodiments, reference is made to the accompanying drawings, which form a part hereof, and in which is shown specific embodiments in which the invention may be practiced. In this context, a directional terminology such as "top", "bottom", "front", "rear", etc. is used with respect to the orientation of the described drawing(s). Moreover, the term "connect" is intended to mean either an indirect or direct electrical / mechanical connection. When a first device is connected to a second device, this connection may be through a direct electrical / mechanical connection or through an indirect electrical / mechanical connection via other devices and connections.The present invention provides a backrest locking mechanism configured for use on a base of a child seat and a backrest of the child seat removably connected to the base. The seatback locking mechanism includes a locking pin, a locking component, and an operating component. The locking pin and the locking component are arranged on the base and the backrest, respectively. A locking hole structure is formed on the locking component and configured to engage with the locking pin. The actuation component is movably arranged on the backrest or on the base. The operating component may drive the locking pin and the locking hole structure to engage with or disengage from each other when the operating component is operated. By such a means, not only the arrangement of the backrest and the base can be made more reliable and compact, but also the operation of arranging and removing the backrest and the base can be made easier and more convenient. In order to illustrate the technical specifications and structural features, as well as the purposes and effects achieved with the present invention, relevant embodiments and drawings are described as follows.Reference is made to Figures 1 to 4. FIG. 1 is a schematic view of a child seat 100 according to an embodiment of the present invention. FIGS. 2 to 4 are views showing different portions of the child seat 100 according to the embodiment of the present invention. As shown in FIGS. 1 to 4, the child seat 100 includes a base 110, a seat back 120, and a seat back locking mechanism 130. The seat back 120 is detachably connected to the base 110 through the seat back locking mechanism 130. By the seat back locking mechanism 130, the operation of arranging and removing the seat back and the base can be made easier and more convenient.As shown in FIGS. 2 and 3, two placement arms 121 protrude from two sides of a lower end of the seat back 120 and are parallel to each other. Two guide slots 111 are formed on an upper surface of the base 110 and at locations corresponding to the two locating arms 121. The backrest locking mechanism 130 is partially disposed between the respective locating arm 121 and a lateral wall of the corresponding locking slot 111. The seat back locking mechanism 130 may lock the two placement arms 121 to the base 110 to prevent the seat back 120 from being detached from the base 110 when the two placement arms 121 are inserted into the two guide slots 111. When the seat back locking mechanism 130 is in a released state, the seat back 120 is detachable from the base 110.Reference is made to Figs. 4 to 6. FIG. 5 is a sectional view of the child seat 100 taken along an A-A line shown in FIG. 1 according to the embodiment of the present invention. FIG. 6 is a view showing a detail "B" of the child seat 100 according to the embodiment of the present invention. As shown in FIGS. 4 to 6, the seat back lock mechanism 130 includes two lock pins 131, two lock components 132, and two operation components 133. The respective locking pin 131 is arranged on the corresponding arrangement arm 121. The respective locking component 132 is disposed on the base 110, and a locking hole structure 1321 is formed on the respective locking component 132 and corresponds to the corresponding locking pin 131. The respective locking component 132 is retractable and extendable. The respective actuating component 133 is movably arranged on the base 110 and connected to the corresponding locking component 132. When the respective operating component 133 is pushed or operated for movement, the respective operating component 133 may drive the respective locking component 132 to drive the respective locking pin 131 and the respective locking hole structure 1321 to engage with or disengage from each other.Preferably, according to this embodiment, the respective actuating component 133 can be a sliding component. Two slide holes 112 are formed on the upper surface of the base 110. The respective sliding component is slidably disposed within the corresponding sliding hole 112 and partially exposed from the base 110 through the corresponding sliding hole 112, so that easy operation by the user is possible. The respective sliding component is connected to the corresponding locking component 132. When the respective sliding component slides, the respective sliding component drives the respective locking component 132 to drive the respective locking component 132 and the respective locking pin 131 to engage with each other or disengage from each other.However, the structure of the child seat is not limited to this embodiment. For example, according to another embodiment, the backrest locking mechanism may comprise only one locking pin on one side of the backrest, only one locking component on one side of the base, and an operating component slidably disposed on the base and connected to the locking component, wherein only one sliding hole for receiving the operating component may be formed on the base.Further, reference is made to Figs. 7 to 10. FIGS. 7 to 10 are views showing the partial structure of the child seat according to various embodiments of the present invention. As shown in FIG. 7, according to this embodiment, the seat back locking mechanism may include a locking pin 131 at a side of the seat back 120, a locking component 132 at a side of the base 110, and an operating component 133 slidably disposed on the seat back 120 and connected to the locking pin 131. The operation component 133 drives the lock pin 131 to retract or extend to drive the lock pin 131 and the lock hole structure 1321 to engage with or disengage from each other when the operation component 133 is operated. That is, the lock pin 131 of this embodiment is retractable and extendable.As shown in FIG. 8, according to this embodiment, the seat back locking mechanism may include a locking pin 131 at a side of the base 110, a locking component 132 at a side of the seat back 120, and an operating component 133 slidably disposed on the base 110 and connected to the locking pin 131. The operation component 133 drives the lock pin 131 to retract or extend to drive the lock pin 131 and the lock hole structure 1321 to engage with or disengage from each other when the operation component 133 is operated.As shown in FIG. 9, according to this embodiment, the seat back locking mechanism may include a locking pin 131 at a side of the base 110, a locking component 132 at a side of the seat back 120, and an operating component 133 slidably disposed on the seat back 120 and connected to the locking component 132. The operating component 133 drives the locking component 132 to retract or extend to drive the locking pin 131 and the locking hole structure to engage with or disengage from each other when the operating component 133 is operated.As shown in FIG. 10, according to this embodiment, the seat back locking mechanism may include two locking pins 131 at two sides of the seat back 120, two locking components 132 at two sides of the base 110, and only one operating component 133 slidably disposed on the base 110 and movably connected to the locking components 132. The operation component 133 drives the two lock components 132 to retract or extend to drive the two lock pins 131 and the two lock hole structures 1321 to engage with or disengage from each other when the operation component 133 is operated.According to another embodiment, only one locating arm may protrude from the backrest and only one guide slot may be formed on the base. The backrest locking mechanism may include at least one locking pin and at least one locking component disposed on the locating arm and the guide slot, respectively.Further, the device of the operation component is not limited to the above embodiments. For example, according to another embodiment, the operating component may be a pressing component, e.g., a push button, and a pressing slot is formed on the backrest or the base and corresponds to the pressing component, so that the pressing component can be pressed. The pushing component may drive the corresponding locking component or pin to retract or extend to place and remove a seat back on and from a base.According to another embodiment, the actuation component may be a rotational component. A through hole may be formed on the rotating component such that the corresponding locking component or pin may pass through. A portion of the pivot component is exposed from the base or the backrest for easy actuation by the user. When the rotational component is urged to rotate, the rotational component may drive the corresponding locking component or the corresponding locking pin to retract or extend to locate and remove the seat back on and from the base.According to another embodiment, the operating component may be a rotating component having a rotatable locking portion, a rotatable engaging portion and a rotatable releasing portion. The rotatable engagement portion is configured to engage with the rotatable locking portion. The rotatable release portion is configured to drive the rotatable engagement portion to move. Thus, after the rotating component is rotated to drive the corresponding locking component and the corresponding locking pin to disengage from each other, the rotatable engagement portion may be actuated to engage with the rotatable locking portion such that the corresponding locking component or the corresponding locking pin connected to the rotating component is positionable in a release position and thus the user may release the seat back from the base without continuously actuating the rotating component. Further, when the rotatable release portion is operated to drive the rotatable engagement portion to disengage from the rotatable locking portion, the rotational component may be reset to drive the corresponding locking pin and the corresponding engagement component to engage with each other.Further, as shown in FIG. 4, the seat back lock mechanism 130 further includes a reset component 134 that is engageable with the two operating components 133. The reset component 134 is disposed on the base 110 and connected to the two operating components 133. When the respective operating component 133 is operated to drive the respective locking component 132 to release the respective locking hole structure 1321 from the respective locking pin 131, the respective operated operating component 133 may elastically deform the restoring component 134. When the respective operating component 133 is released, the elastically deformed restoring component 134 may drive the respective operating component 133 for restoring, so that the respective locking component 132 is driven to engage the respective locking hole structure 1321 with the respective locking pin 131.Preferably, in accordance with the embodiment, the restoring component 134 can be a compression spring. However, the present invention is not limited to this embodiment. For example, according to another embodiment, the restoring component can be a tension spring, a torsion spring, a leaf spring or the respective other elastic component which can pretension the actuating component for restoring.In addition, the configuration and the number of reset components are not clearly limited to this embodiment. It depends on practical requirements. For example, according to another embodiment, the backrest locking mechanism may include two operating components disposed on the base, and the backrest locking mechanism may further include two restoring components independently disposed on the base and respectively connected to the two operating components, wherein two ends of the respective restoring component abut against the corresponding operating component and the base.According to another embodiment, when the backrest locking mechanism comprises two operating components arranged on the backrest, the backrest locking mechanism can comprise only one restoring component arranged on the backrest, connected to the two operating components and arranged between the two operating components.According to another embodiment, the backrest locking mechanism may comprise two operating components arranged on the backrest, the backrest locking mechanism may further comprise two restoring components arranged on the backrest, and two ends of the respective restoring component abut against the corresponding operating component and the backrest.According to another embodiment, the backrest locking mechanism may include only one operating component disposed on the base, the backrest locking mechanism may further include only one restoring component disposed on the base and connected to the operating component, and two ends of the restoring component abut against the operating component and the base.According to another embodiment, the backrest locking mechanism may include only one operating component disposed on the backrest, the backrest locking mechanism may further include only one restoring component disposed on the backrest and connected to the operating component, and two ends of the restoring component abut against the operating component and the backrest.In particular, as shown in Figs. 4 to 6, according to this embodiment, the respective locking pin 131 is fixedly connected to the corresponding locating arm 121. A protruding end of each lock pin 131 protrudes from a lateral wall of the corresponding arrangement arm 121. The respective locking component 132 is slidably disposed on the base 110. One end of each locking component 132 at which the locking hole structure 1321 is formed is disposed inside the corresponding guide slot 111. The respective operating component 133 is slidably connected to the base 110 and fixedly connected to the corresponding locking component 132, and a sliding direction of the respective operating component 133 is parallel to a longitudinal direction of the corresponding locking pin 131. The reset component 134 is disposed within the base 110 and abuts between the two actuation components 133. The respective locking pin 131 and the reset component 134 are arranged on two opposite sides of the respective actuating component 133. The respective actuating component 133 is displaceable between a first position and a second position. When the respective operating component 133 is disposed at the first position, the corresponding positioning pin 131 and the corresponding locking hole structure 1321 are engaged with each other. When the respective operating component 133 slides from the first position to the second position, the respective operating component 133 drives the corresponding locking component 132 to slide to release the corresponding locking hole structure 1321 from the corresponding locking pin 131. The reset component 134 may bias the two actuation components 133 to slide from the second position to the first position, such that the corresponding locking component 132 is driven to slide toward the corresponding locking pin 131.As shown in FIGS. 4 to 6, each locking component 132 includes a locking plate 1322 and a connecting arm 1323. An included angle is formed between the respective lock plate 1322 and the corresponding link arm 1323. An extending direction of the respective locking plate 1322 may be substantially perpendicular to the longitudinal direction of the corresponding locking pin 131. The respective locking hole structure 1321 is formed on the corresponding locking plate 1322. A fixing hole is formed at an end of each link arm 1323 spaced apart from the corresponding lock plate 1322. The respective link arm 1323 is slidably disposed within the base 110. The respective locking plate 1322 is disposed within the corresponding locking slot 111 as shown in FIG. 3. A lower portion of each operating component 133 is fixedly connected to a connecting component fixed to the fixing hole. Therefore, when displacing the respective operating component 132, the respective operating component 133 may drive the respective locking component 132 to displace, so that the respective locking hole structure 1321 and the respective locking pin 131 are driven to engage with each other or to disengage from each other.Further, the two operating components 133 and the two locking components 132 are slidably disposed between the two arranging arms 121. Accordingly, the protruding end of each locking pin 131 protrudes from the lateral wall of the corresponding arrangement arm 121 adjacent to the corresponding operating component 133. However, the configurations of the locking component and the locking pin are not limited to this embodiment.In addition, a ball head 1311 protrudes from an end of the respective locking pin 131 that is adjacent to the corresponding locking component 132, i.e., the ball head 1311 protrudes from the protruding end of the respective locking pin 131. An outer diameter of each locking head 1311 is larger than an outer diameter of the corresponding locking pin 131 and smaller than an inner diameter of the corresponding locking hole structure 1321. The respective ball head 1311 can easily guide the corresponding lock pin 131 to engage with the corresponding lock hole structure 1321 during a sliding movement of the corresponding arrangement arm 121.As shown in FIGS. 4 to 6, a positioning protrusion 1331 protrudes from a lateral portion of each operating component 133. The reset component 134 may be disposed along a direction substantially parallel to the sliding direction of the operation component 133, and the both ends of the reset component 134 wrap around the positioning protrusions 1331 of the both operation components 133 and abut against the both operation components 133, respectively. When the respective actuating component 133 is acted upon for displacement into the second position, the restoring component 134 is acted upon for elastic deformation. When the respective release component 133 is released, the elastically deformed return component 134 may be reset to drive the respective actuation component 133 to slide to the first position.As shown in FIGS. 3, 5, and 6, an operation recess 1332 is formed at the upper end of each operation component 133. The lower portion of each operating component 133 is fixedly connected to the corresponding link arm 1323. The operation recesses 1332 on the two operation components 133 are exposed from the upper surface of the base 110, so that the user can insert his fingers into the two operation recesses 1332 to operate the two operation components 133, thereby making the operation of the operation component 133 easier and more convenient.As shown in FIGS. 5 and 6, according to this embodiment, a receiving hole 113 is formed inside the base 110 and connected to the two slide holes 112. The returning component 134 is accommodated inside the accommodation hole 113. The two ends of the reset component 134 abut against the two actuating components 133, respectively. Therefore, the user can insert his thumb and index finger into the operation recesses 1332 of the two operation members 133 to drive the operation members 133 to slide from the first position to the second position and toward a middle portion of the base 110 to pull the two locking members 132 to disengage from the two locking pins 131, so that the seat back 120 is detachable from the base 110.As shown in FIGS. 1 to 6, the operation principle of the backrest locking mechanism 130 of the child seat 100 will be described as follows.When the seat back 120 is disposed on the base 110, the two placement arms 121 of the seat back 120 can be inserted into the two guide slots 111 on the base 110 forward along an arrow direction shown in FIGS. 1 and 2. The respective fastening arm 121 may press the respective locking component 132 to slide toward the central portion of the base 110 by abutting the respective locking pin 131 against the respective locking plate 1322 to drive the respective operating component 133 to slide toward the second position to compress the restoring component 134 upon the forward slide movement of the respective fastening arm 121. When the respective locating arm 121 slides to a position where the corresponding locking pin 131 is aligned with the corresponding locking hole structure 1321, the elastically deformed restoring component 134 may drive the corresponding operating component 133 to slide to the first position, such that the corresponding locking component 132 is driven to slide toward the corresponding locking pin 131 to engage the corresponding locking hole structure 1321 with the corresponding locking pin 131 to lock the seat back 120 to the base 110. Consequently, the arrangement of the base 110 and the seat back 120 is more reliably configured.As shown in FIGS. 4 to 6, when the seat back 120 is to be released from the base 110, the user may insert his thumb and index finger into the operation recesses 1332 on the two operation components 133 to drive the two operation components 133 to slide from the first position to the second position and toward the central portion of the base 110. When the two operating components 133 slide from the first position to the second position, the respective operating component 133 drives the corresponding locking component 132 to slide, so that the corresponding locking hole structure 1321 is released from the corresponding locking pin 131, thereby enabling the removal of the seat back 120 from the base 110. During the above process, the restoring component 134 is compressed to be elastically deformed. Consequently, when the user releases the two operating components 133, the elastically deformed restoring component 134 may be restored to drive the two operating components 133 to slide from the second position to the first position to drive the two locking components 132 to restore.Detailed description for other structures of the base 110 and the seat back 120 of the child seat 100 will not be given here for simplicity.In contrast to the prior art, according to the present invention, the locking pin and the locking component of the backrest locking mechanism are arranged on the backrest and the base, respectively, and the locking hole structure is formed on the locking component and is configured for engaging with the locking pin. Further, the operating component movably disposed on the backrest and the base drives the locking pin and the locking component to engage with each other or disengage from each other when the operating component is operated. The present invention not only includes a simple structure and provides the ability to easily and conveniently locate and separate the backrest and the base from each other, but also enables more reliable attachment of the backrest and the base.

Claims

A backrest locking mechanism (130) configured for a backrest (120) and a base (110) of a child seat (100), wherein the backrest (120) is detachably connected to the base (110), and wherein the backrest locking mechanism (130) comprises: a locking pin (131) disposed on the backrest (120); a locking component (132) disposed on the base (110), wherein a locking hole structure (1321) is formed on the locking component (132), and the locking pin (131) is configured for detachably engaging with the locking hole structure (1321); and an operating component (133) movably disposed on the backrest (120) or the base (110), wherein the operating component (133) drives the lock pin (131) and the lock hole structure (1321) to engage with or disengage from each other when the operating component (133) is operated.A backrest locking mechanism (130) configured for a backrest (120) and a base (110) of a child seat (100), wherein the backrest (120) is detachably connected to the base (110), and wherein the backrest locking mechanism (130) comprises: a locking pin (131) disposed on the base (110); a locking component (132) disposed on the backrest (120), wherein a locking hole structure (1321) is formed on the locking component (132), and the locking pin (131) is configured for detachably engaging with the locking hole structure (1321); and an operating component (133) movably disposed on the backrest (120), wherein the operating component (133) drives the locking pin (131) and the locking hole structure (1321) to engage with or disengage from each other when the operating component (133) is operated, wherein the locking pin (131) is restricted to move within the locking component (132) along a longitudinal direction of the locking component (132).The backrest locking mechanism (130) according to claim 1 or 2, characterized in that a member, namely the locking component (132) or the locking pin (131), is retractable and extendable.The backrest locking mechanism (130) according to claim 3, characterized in that the operating component (133) is connected to the element, namely the locking component (132) or the locking pin (131), and is configured to drive this element, namely the locking component (132) or the locking pin (131), for retraction or extension.The backrest locking mechanism (130) according to claim 1 or 2, characterized in that the operating component (133) is a pushing component, a pushing component or a rotating component.The backrest locking mechanism (130) according to claim 1 or 2, characterized in that the backrest locking mechanism (130) further comprises a restoring component (134) connected to the operating component (133), wherein the restoring component (134) is elastically deformed upon operation of the operating component (133), and the elastically deformed restoring component (134) drives the operating component (133) for restoring.The backrest locking mechanism (130) of claim 6, characterized in that the operating component (133) is slidable between a first position and a second position; the locking pin (131) and the locking hole structure (1321) are engaged with each other when the operating component (133) is disposed in the first position; the operating component (133) drives the locking pin (131) and the locking hole structure (1321) to separate from each other when the operating component (133) slides from the first position to the second position; and the restoring component (134) biases the operating component (133) to slide from the second position to the first position.The backrest locking mechanism (130) according to claim 7, characterized in that the locking component (132) is fixedly connected to the operating component (133) and slidable together with the operating component (133), the locking component (132) comprises a locking plate (1322) extending perpendicular to a longitudinal direction of the locking pin (131), and the locking hole structure (1321) is formed on the locking plate (1322).The backrest locking mechanism (130) according to claim 8, characterized in that the locking component (132) further comprises a link arm (1323) fixedly connected to the locking plate (1322) and the operating component (133) to be driven by the operating component (133), and an included angle is formed between the link arm (1323) and the locking plate (1322).The backrest locking mechanism (130) according to claim 6, characterized in that a positioning protrusion (1331) protrudes from a lateral portion of the operating component (133), and an end of the restoring component (134) covers the positioning protrusion (1331) and abuts against the operating component (133).The backrest locking mechanism (130) according to claim 10, characterized in that a sliding direction of the operating component (133) is parallel to a longitudinal direction of the locking pin (131), and the restoring component (134) and the locking pin (131) are disposed at two opposite sides of the operating component (133).The backrest locking mechanism (130) according to claim 1 or 2, characterized in that an operation recess (1332) is formed at an end of the operation component (133) exposed from the backrest (120) or the base (110).The backrest locking mechanism (130) according to claim 1 or 2, characterized in that a ball head (1311) protrudes from an end of the locking pin (131) adjacent to the locking component (132), and an outer diameter of the ball head (1311) is larger than an outer diameter of the locking pin (131).A child seat (100) comprising: a base (110); a backrest (120) removably connected to the base (110); and wherein the child seat (100) further comprises: a backrest locking mechanism (130) comprising: at least one locking pin (131) disposed on the backrest (120); at least one locking component (132) disposed on the base (110), wherein a locking hole structure (1321) is formed on the at least one locking component (132), wherein the at least one locking pin (131) is configured to releasably engage with the locking hole structure (1321); at least one operating component (133) movably disposed on the backrest (120) or the base (110), wherein the at least one operating component (133) drives the at least one locking pin (131) and the locking hole structure (1321) to engage with or disengage from each other when the at least one operating component (133) is operated.A child seat (100) comprising: a base (110); a backrest (120) removably connected to the base (110); and wherein the child seat (100) further comprises: a backrest locking mechanism (130) comprising: at least one locking pin (131) disposed on the base (110); at least one locking component (132) disposed on the backrest (120), wherein a locking hole structure (1321) is formed on the at least one locking component (132), wherein the at least one locking pin (131) is configured to releasably engage with the locking hole structure (1321); at least one operating component (133) movably disposed on the backrest (120), the at least one operating component (133) driving the at least one locking pin (131) and the locking hole structure (1321) to engage with or disengage from each other when the at least one operating component (133) is operated, wherein the locking pin (131) is restricted to move within the locking component (132) along a fastening direction of the backrest (120).The child seat (100) according to claim 14 or 15, characterized in that at least one locating arm (121) protrudes from a lower end of the backrest (120); at least one guide slot (111) is formed on the base (110); the locating arm (121) is at least partially accommodated within the at least one guide slot (111) and is slidable relative to the at least one guide slot (111); the at least one locking pin (131) is located on the at least one locating arm (121); the at least one locking component (132) is partially accommodated within the at least one guide slot (111); and the at least one locking pin (131) and the locking hole structure (1321) engage each other when the at least one locating arm (121) is at least partially received within the at least one guiding slot (111), wherein the locking pin (131) is constrained to move within the locking component (132) along a sliding direction of the at least one locating arm (121).The child seat (100) according to claim 16, characterized in that the at least one locking component (132) comprises a link arm (1323) and a locking plate (1322) connected to the link arm (1323), an included angle is formed between the link arm (1323) and the locking plate (1322), the link arm (1323) is slidably disposed on the base (110), the locking plate (1322) is disposed within the at least one guide slot (111), the locking hole structure (1321) is formed on the locking plate (1322), and the at least one locking pin (131) is fixedly connected to the at least one locating arm (121) and protrudes from a lateral wall of the at least one locating arm (121) for engaging with the locking hole structure (1321).The child seat (100) of claim 17, characterized in that at least one sliding hole (112) is formed on the base (110), the at least one operating component (133) is at least partially accommodated within the at least one sliding hole (112) and is slidable relative to the at least one sliding hole (112), and the at least one operating component (133) is connected to the connecting arm (1323).The child seat (100) of claim 17, characterized in that the backrest locking mechanism (130) further comprises at least one restoring component (134) disposed on the base (110) and abutting against the at least one operating component (133), and the at least one restoring component (134) is configured to bias the at least one operating component (133) to drive the at least one locking component (132) to slide toward the at least one locking pin (131).The child seat (100) according to claim 19, characterized in that the at least one locating arm (121) comprises two locating arms (121), the at least one guide slot (111) comprises two guide slots (111), the at least one locking pin (131) comprises two locking pins (131), the at least one locking component (132) comprises two locking components (132), the at least one operating component (133) comprises two operating components (133), each of the two locking components (132) is at least partially arranged within a corresponding one of the two guide slots (111), each of the two locking pins (131) is arranged on a corresponding one of the two locating arms (121), the at least one restoring component (134) comprises only one restoring component (134), the one restoring component (134) is an integral structure, and two ends of the one reset component (134) abut against the two operating components (133), respectively.

Images