Ironing plate adjusting mechanism and garment steamer

Abstract

The utility model discloses an ironing board adjusting mechanism and a garment steamer, belongs to clothes ironing equipment, and aims to solve the problems that a quadrilateral structure for realizing posture change of an ironing board in the prior art has more parts and poorer stability, and a triangular structure for supporting the ironing board is formed by a base frame, a connecting rod and the ironing board. When the ironing plate is adjusted, the shape of the triangle changes, after the ironing plate is adjusted to the needed inclination angle, the triangle is locked and fixed through the locking mechanism, and the ironing plate is supported more stably. The ironing plate adjusting mechanism is few in parts and simple in structure. When the ironing plate needs to be adjusted, the ironing plate can be rotated around the first shaft by releasing the locking and fixing of the locking mechanism on the triangle through the control handle, and the operation is convenient.

Description

Technical Field

[0001] The utility model belongs to clothing ironing equipment, in particular to an ironing board adjusting mechanism and a clothing ironing machine. Background Art

[0002] The invention patent application with application publication number CN117449077A discloses a steam garment steamer with adjustable ironing board tilt angle, and the invention patent application with application publication number CN117845594A discloses an ironing board and garment steamer with changeable posture. The ironing boards disclosed in the two patent documents use a quadrilateral structure to achieve posture change of the ironing board and fix the ironing board in a desired posture. They have a relatively simple structure and convenient operation. However, the quadrilateral structure requires more parts and has poor stability. Utility Model Content

[0003] The technical problem to be solved and the technical task proposed by the utility model are to overcome the defects of the existing technology of the quadrilateral structure for realizing the posture change of the ironing board, that is, there are many parts and poor stability, and to provide an ironing board adjustment mechanism and a hanging ironing machine with a simpler structure and better stability, aiming to reduce the parts of the product, provide a more stable and reliable support for the ironing board, and improve the convenience of operation.

[0004] In order to achieve the above-mentioned purpose, the ironing board adjustment mechanism of the utility model comprises:

[0005] An ironing board having a sliding structure;

[0006] An angle adjustment mechanism, comprising a base frame and a connecting rod, wherein the base frame is rotatably connected to an ironing board via a first axis, the base frame is rotatably connected to a first end of the connecting rod via a second axis, the second end of the connecting rod is slidably connected to a sliding structure of the ironing board via a third axis, the axial projection point of the first axis, the axial projection point of the second axis and the axial projection point of the third axis are respectively located at the vertices of a triangle, wherein the ironing board rotates around the first axis to adjust its tilt angle, and the rotation of the ironing board around the first axis causes the connecting rod to rotate around the second axis and the third axis to slide along the sliding structure to change the shape of the triangle;

[0007] A locking mechanism locks and fixes the triangle to prevent the ironing board from rotating around the first axis. The locking mechanism comprises a handle. The handle is manipulated to release the locking mechanism from fixing the triangle to allow the ironing board to rotate around the first axis.

[0008] The ironing board adjustment mechanism comprises a base frame, a connecting rod and an ironing board to form a triangular structure for supporting the ironing board. When the ironing board is adjusted, the shape of the triangle changes accordingly. After the ironing board is adjusted to a desired tilt angle, the triangle is locked and fixed by a locking mechanism, so that the ironing board is supported more stably. The ironing board adjustment mechanism has few parts and a simple structure. When the ironing board is to be adjusted, the ironing board can be rotated around the first axis by operating the handle to release the locking and fixing of the triangle by the locking mechanism, which is convenient to operate.

[0009] Preferably, in order to provide reliable support for the ironing board and allow the connecting rod and the ironing board to slide flexibly, the sliding structure is a guide groove provided on both sides of the ironing board and extending along the length direction of the ironing board, and both ends of the third axis are respectively located in the corresponding guide grooves.

[0010] Preferably, the ironing board is in an upright position, a horizontal position, or any inclined angle between the upright position and the horizontal position as the shape of the triangle changes; the distance between the first axis and the third axis gradually increases as the ironing board changes from an upright position to a horizontal position, and the first axis is located below the third axis when the ironing board is upright. Accordingly, the distance between the first axis and the third axis is greater when the ironing board is horizontal than when the ironing board is upright, so that the ironing board can be stably supported and can withstand the greater pressure generated by ironing when ironing clothes laid flat on the ironing board.

[0011] Preferably, when the ironing board is upright, the third axis is located at one end of the sliding structure, and when the ironing board is horizontal, the third axis is located at the other end of the sliding structure. Accordingly, the range of motion of the third axis can be limited by the sliding structure, and when the third axis is located at one end of the sliding structure, the ironing board is just upright, and when the third axis is located at the other end of the sliding structure, the ironing board is just horizontal, and the ironing board is accurately placed in a horizontal or upright state.

[0012] Preferably, the base frame comprises a support portion, a first extension portion and a second extension portion, wherein the first extension portion extends forward from the support portion, the second extension portion extends backward from the support portion, the first axis is located at the first extension portion, and the second axis is located at the second extension portion; when the ironing board is placed horizontally, the first axis is located at the front side of the support portion, and the third axis is located at the rear side of the support portion. Accordingly, sufficient space is provided for the ironing board to change its angle, and obstacles are avoided when the ironing board changes its angle.

[0013] Preferably, the first extension portion is higher than the second extension portion, the connecting rod has an escape portion, and the upper end of the support portion is located at the escape portion when the ironing board is upright, thereby providing sufficient space for the ironing board to change its angle and avoiding obstacles when the ironing board changes its angle.

[0014] Preferably, the first shaft and the third shaft are both connected to the back of the ironing board, which ensures that the front of the ironing board is flat and can rotate smoothly. When the ironing board is upright, its front side faces forward for clothes to be hung on the ironing board for ironing; when the ironing board is flat, its front side faces upward for clothes to be laid flat on the ironing board for ironing.

[0015] Preferably, for compact structure, the locking mechanism is mounted on the back of the ironing board. In particular, the locking mechanism is arranged on the back of the ironing board, and the structural stability and strength of the locking mechanism are achieved by the ironing board, and the locking mechanism is kept at a large distance from the first axis and the second axis. When the locking mechanism realizes locking and fixing of the ironing board, it can resist a large external force, ensuring that the angle of the ironing board does not change.

[0016] Preferably, in order to facilitate adjusting the angle of the ironing board and to be able to adjust the ironing board to any tilt angle between upright and horizontal, the locking mechanism includes:

[0017] A slide bar, which is arranged on the back of the ironing board and extends along the length direction of the ironing board;

[0018] A locking member is fixed to the back of the ironing board, and is sleeved on the slide bar through the through hole and locks the slide bar and the triangle by elastic force;

[0019] An unlocking member, which cooperates with the handle and the locking member;

[0020] The operating handle links the unlocking member and the locking member to prompt the locking member to unlock the slide bar.

[0021] Since the locking member is sleeved on the slide rod through the through hole and uses elastic force to lock the slide rod and the triangle, no matter whether the ironing board is rotated to any inclination angle between upright and horizontal, the locking member can pass through the through hole on the slide rod and use elastic force to lock the slide rod and the triangle to fix the ironing board.

[0022] Preferably, the locking member locks the slide bar by clamping the slide bar at the edge of its through hole, and the locking member unlocks the slide bar by releasing the slide bar at the edge of its through hole. The structure is simple and compact, and the locking and unlocking actions are sensitive.

[0023] Preferably, the locking mechanism further comprises a linkage, the handle is located at one end of the ironing board, and the linkage is connected between the handle and the unlocking member to realize the linkage between the handle and the unlocking member. Accordingly, the ironing board can be turned over by holding one end of the ironing board while operating the handle, and the ironing board can be adjusted with one hand, which is convenient to operate.

[0024] Preferably, the unlocking member is rotatably arranged on the back side of the ironing board and is matched with the locking member in a toggle manner. Accordingly, the unlocking member is unlocked by toggling the locking member through the rotation of the unlocking member.

[0025] Preferably, the locking member comprises a first locking member and a second locking member, and the locking directions of the first locking member and the second locking member are opposite. Accordingly, the slide bar can be locked in two directions, thereby stably maintaining the ironing board at a desired angle.

[0026] Preferably, one end of the slide bar is connected to the third axis. Accordingly, when the angle of the ironing board is changed, the slide bar is moved together with the third axis to keep synchronization, thereby ensuring smooth movement of the slide bar.

[0027] Preferably, the locking member is an elastic member and provides elastic force for locking the sliding rod. Accordingly, the structure can be simplified.

[0028] Preferably, a first elastic element acts on the locking member, and the first elastic element provides elastic force for locking the sliding rod. Since the elastic force of the locking member to lock the sliding rod will be fed back to the handle when the handle is operated, the elastic force will affect the comfort of operating the handle. When the first elastic element provides the elastic force to lock the sliding rod, it can provide a long-lasting moderate elastic force to improve the comfort of operating the handle. In particular, since the locking member locks the sliding rod by elastic force, when the first elastic element provides the elastic force, the reliability of the locking member locking the sliding rod can be guaranteed.

[0029] Preferably, the locking member and the unlocking member are located in the middle of the back of the ironing board. When adjusting the angle of the ironing board, the slide bar can always be hidden at the back of the ironing board to avoid the slide bar exceeding the contour of the ironing board and causing obstacles.

[0030] Preferably, the locking member and the unlocking member are located in a box, and the box is fixed to the back of the ironing board. Accordingly, the cooperation between the locking member and the unlocking member is ensured to avoid interference from external factors.

[0031] Preferably, a second elastic element acts on the handle to assist the handle in resetting after being operated.

[0032] The utility model of the hanging ironing machine comprises a main machine, a supporting structure and an ironing board adjusting mechanism of the utility model, wherein the base frame and the supporting structure are made as one body or the base frame is assembled on the supporting structure. Accordingly, when in use, the ironing board is made to change its angle relative to the supporting structure to meet the ironing requirements.

[0033] The utility model comprises a base frame, a connecting rod and an ironing board to form a triangular structure for supporting an ironing board. When the ironing board is adjusted, the shape of the triangle changes accordingly. After the ironing board is adjusted to a desired inclination angle, the triangle is locked and fixed by a locking mechanism, so that the supporting ironing board is more stable. The ironing board adjustment mechanism has few parts and a simple structure. When the ironing board is to be adjusted, the ironing board can be rotated around the first axis by operating the handle to release the locking and fixing of the triangle by the locking mechanism, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is an isometric view of the ironing board adjustment mechanism of the utility model;

[0035] Figure 2 for Figure 1 An orthographic schematic diagram of the ironing board adjustment mechanism shown;

[0036] Figure 3 for Figure 1-2 The structural exploded diagram of the ironing board adjustment mechanism shown;

[0037] Figure 4 for Figure 3 A schematic diagram of the ironing board adjustment mechanism from another perspective;

[0038] Figure 5 for Figure 2 AA section view;

[0039] Figure 6 for Figure 5 A schematic diagram of the model of the triangle defined by the base frame, the connecting rod and the ironing board in the state shown;

[0040] Figure 7 for Figure 5 A schematic diagram of the ironing board in the state shown being adjusted to be flat;

[0041] Figure 8 for Figure 7 A schematic diagram of the model of the triangle defined by the base frame, the connecting rod and the ironing board in the state shown;

[0042] Fig. 9 for Figure 5 A schematic diagram of the ironing board in the state shown being adjusted to be flat;

[0043] Fig.10 for Fig. 9 A schematic diagram of the model of the triangle defined by the base frame, the connecting rod and the ironing board in the state shown;

[0044] Fig.11 It is a schematic diagram of the structural decomposition of the locking mechanism of the utility model;

[0045] Fig.12 for Fig.11 A schematic diagram of the locking mechanism shown in another perspective;

[0046] Fig.13 It is a schematic diagram of an orthographic projection of the locking mechanism of the utility model from one viewing angle;

[0047] Fig.14 for Fig.13 BB section view;

[0048] Fig.15 for Fig.14 A schematic diagram showing the locking mechanism in an unlocked state;

[0049] Fig.16 This is a schematic diagram of a garment steamer according to an embodiment of the present invention;

[0050] Description of the numbers in the figure:

[0051] 100 Ironing board adjustment mechanism:

[0052] 110 ironing board, 111 sliding structure;

[0053] 120 degree angle adjustment mechanism,

[0054] 121 base frame, 1211 support portion, 1212 first extension portion, 1213 second extension portion,

[0055] 122 connecting rod, 1221 avoidance part,

[0056] a is the first axis, b is the second axis, c is the third axis, A is the axial projection point of the first axis, B is the axial projection point of the second axis, C is the axial projection point of the third axis,

[0057] 130 locking mechanism: 131 handle, 132 slide bar, 133a first locking member, 133b second locking member, 134 unlocking member, 1341 pin shaft, 135 linkage member, 136 box, 1361 seat, 1362 cover;

[0058] 200 main unit, 300 support structure, 400 steam pipe, 500 handheld ironing head. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0060] The terms "including" and "having" and any variations thereof in the specification and claims of the present utility model are intended to cover non-exclusive inclusions. For example, a method or product comprising a series of technical features is not necessarily limited to those technical features clearly listed, but may also include other technical features that are not clearly listed and can be included in the method or product.

[0061] In the description of the present invention, it should be understood that the terms "front", "rear", "up", "down", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Among them, "front" and "rear", "up" and "down", "left" and "right" are opposite directions.

[0062] In the description of the present utility model, it is necessary to understand that the technical features defined by the terms "first", "second" and the like with sequential concepts are only for the purpose of clearly describing the defined technical features so that the defined technical features can be clearly distinguished from other technical features, but do not represent such naming in actual implementation, and therefore cannot be understood as a limitation of the present utility model.

[0063] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0064] The ironing board adjustment mechanism of one embodiment of the utility model is Figures 1 to 15 Shown.

[0065] like Figures 1 to 4 , Figure 5 , Figure 7 , Fig. 9 As shown, the ironing board adjustment mechanism includes an ironing board 110 , an angle adjustment mechanism 120 and a locking mechanism 130 .

[0066] The ironing board 110 is in the shape of a plate, preferably made of plastic. In order to increase the strength of the ironing board and reduce the weight, through holes are provided on the ironing board, ribs are provided on the back of the ironing board, and side edges are provided on the edges of the ironing board. The through holes can increase the permeability of steam. When ironing, a cloth cover can be put on the ironing board. Each side edge has a guide groove as a sliding structure 111.

[0067] The angle adjustment mechanism 120 includes a base frame 121 and a connecting rod 122. The base frame 121 is rotatably connected to the ironing board 110 via a first axis a, the base frame 121 is rotatably connected to a first end of the connecting rod 122 via a second axis b, and the second end of the connecting rod 122 is slidably connected to a sliding structure 111 of the ironing board via a third axis c. An axial projection point A of the first axis, an axial projection point B of the second axis, and an axial projection point C of the third axis are respectively located at the vertices of a triangle ABC, wherein the ironing board rotates around the first axis a to adjust its tilt angle, and the rotation of the ironing board around the first axis a causes the connecting rod 122 to rotate around the second axis b and the third axis c to slide along the sliding structure 111 to change the shape of the triangle ABC.

[0068] Based on this structure, the first side AB of the triangle determined by the first axis a and the second axis b is fixed in position and unchanged in length; the second side BC of the triangle determined by the second axis b and the third axis c, i.e. the connecting rod, is unchanged in length and can be changed in position; the third side AC of the triangle determined by the first axis a and the third axis c can change in length and position. Figure 5 , Figure 6 As shown, the ironing board is tilted. Figure 5 , Figure 6 In the state shown, the ironing board 110 rotates clockwise around the first axis a to achieve Figure 7 , Figure 8 In the flat state shown in FIG. 1 , the ironing board 110 can rotate counterclockwise around the first axis a to achieve Fig. 9 , Fig.10 The ironing board is in the upright state shown. Furthermore, the ironing board is in the upright state, horizontal state, and any inclined angle between the upright state and the horizontal state as the shape of the triangle changes. The distance between the first axis a and the third axis c, that is, the side AC of the triangle ABC, gradually increases as the ironing board changes from the upright state to the horizontal state. When the ironing board is upright, the first axis a is located below the third axis c.

[0069] In order to increase the sliding flexibility of the third shaft c and the sliding structure 111, bearings are installed at both ends of the third shaft, and the bearings are located in the guide groove of the sliding structure. Moreover, the length of the guide groove is configured such that when the ironing board is upright, the third shaft c is located at one end of the sliding structure ( Fig. 9 , Fig.10 The third axis is located at the other end of the sliding structure when the ironing board is placed flat ( Figure 7 , Figure 8 right end as shown).

[0070] Moreover, the base frame 121 has a support portion 1211, a first extension portion 1212 and a second extension portion 1213. The first extension portion 1212 extends forward from the support portion 1211, and the second extension portion 1213 extends backward from the support portion 1212. The first axis a is located at the first extension portion 1212, and the second axis b is located at the second extension portion 1213. When the ironing board is placed horizontally, the first axis a is located at the front side of the support portion 1211, and the third axis c is located at the rear side of the support portion 1211, thereby ensuring that the center of gravity of the ironing board is as close to the support portion 1211 as possible, so that the ironing board is stable. The first extension portion 1212 is higher than the second extension portion 1213, the connecting rod is trapezoidal and its middle part is hollow, and the middle part serves as an avoidance portion 1221. When the ironing board is upright, the upper end of the support portion 1211 is located at the avoidance portion 1221. The first axis a and the third axis c are both connected to the back of the ironing board 110. When the ironing board is upright, the front side faces forward, and when the ironing board is flat, the front side faces upward. Figure 5 , Figure 7 , Fig. 9 In the menu, left is forward and right is backward. Figure 5-6 The tilt shown Figure 7-8 Shown flat and Figure 9-10 When changing between the upright and other postures shown, it can be smooth and without interference. Taking the horizontal plane as the reference, the inclination angle of the ironing board when it is flat is 0 degrees, and the inclination angle of the ironing board when it is upright is 90 degrees. The inclination angle of the ironing board can be adjusted anywhere between 0-90 degrees.

[0071] The locking mechanism 130 is mounted on the back of the ironing board 110, and is used to lock and fix the triangle ABC to prevent the ironing board from rotating around the first axis, thereby fixing the ironing board at a desired angle. In the illustrated structure, the locking mechanism prevents the triangle from deforming by preventing the length of the side AC of the triangle ABC from changing.

[0072] Specifically, the locking mechanism 130 includes a handle 131, and the locking mechanism is operated to release the locking fixation of the triangle to allow the ironing board to rotate around the first axis. The locking mechanism further includes a slide bar 132, a locking member, and an unlocking member 134. The slide bar 132 is arranged on the back of the ironing board 110 and extends along the length direction of the ironing board. One end of the slide bar 132 is sleeved on the third axis c. The locking member is fixed to the back of the ironing board, and the locking member is sleeved on the slide bar through the through hole and locks the slide bar and the triangle by elastic force.

[0073] The unlocking member 134 is linked with the handle 131 and the locking member. In addition, the unlocking member 134 is rotatably arranged on the back of the ironing board and is toggled with the locking member. The handle is operated to link the unlocking member and the locking member so that the locking member unlocks the slide bar. The edge of the through hole clamps the slide bar to make the locking member lock the slide bar, and the edge of the through hole releases the slide bar to make the locking member unlock the slide bar.

[0074] The operation handle links the unlocking member and the locking member so that the locking member unlocks the slide bar can be achieved in any of the following ways:

[0075] First, as shown in the figure, a linkage 135 is configured, that is, the locking mechanism also includes a linkage, the handle 131 is located at one end of the ironing board 110, and the linkage 135 is connected between the handle 131 and the unlocking member 134 to realize the linkage between the handle and the unlocking member. The linkage shown in the figure is in the shape of a rod, and the unlocking member is rotated by pushing or pulling the linkage with the handle. In other embodiments, the linkage can also be a traction rope, such as a steel wire rope, and the unlocking member is rotated by pulling the linkage with the handle.

[0076] Second, the handle is configured to rotate synchronously with the unlocking member coaxially: as shown in the figure, since the unlocking member 134 rotates around the pin 1341, one end of the pin is extended to one side of the ironing board, and the unlocking member 134 and the handle 131 are both fixed to the pin 1341. The pin is configured to rotate, and the unlocking member can be rotated synchronously with the handle. Since the locking member and the unlocking member are located in the middle of the back of the ironing board. Since the locking member and the unlocking member are located in the middle of the back of the ironing board, when the ironing board is rotated, one hand can hold the handle to unlock it, and the other hand can hold one end of the ironing board to flip it. This operation method of adjusting the ironing board with two hands can ensure that the ironing board is stable and does not tip over.

[0077] Figure 11-15In the embodiment, the locking member includes a first locking member 133a and a second locking member 133b, and the locking directions of the first locking member and the second locking member are opposite. Fig.14 In the state where the first locking member and the second locking member lock the slide bar, the first locking member 133a blocks the slide bar 132 to prevent it from moving to the upper right, and the second locking member 133b blocks the slide bar 132 to prevent it from moving to the lower left, so the ironing board cannot be rotated to adjust the tilt angle of the ironing board. Fig.15 As shown, the unlocking member 134 pushes the first locking member 133a and the second locking member 133b to both sides, releasing the locking of the first locking member and the second locking member on the slide bar, and the ironing board is rotated accordingly to adjust the tilt angle of the ironing board. Therefore, in a natural state, the ironing board is locked and fixed in an upright, horizontal or any tilt angle by the locking mechanism. Operate the handle to release the lock, and then the ironing board can be rotated to adjust the tilt angle of the ironing board. After the ironing board is adjusted to the desired tilt angle, release the handle, and the locking mechanism locks the ironing board in this position.

[0078] Figure 11-15 In the structure shown, the first locking member 133a and the second locking member 133b are both elastic members such as leaf springs, thereby providing elastic force for locking the sliding rod. In other embodiments, the locking member itself may not have elastic force, and a first elastic element acts on the locking member, and the first elastic element provides elastic force for locking the sliding rod.

[0079] The first locking member 133a and the second locking member 133b are both fixed in the box 136. The unlocking member 134 is rotatably assembled in the box 136 and is located between the first locking member 133a and the second locking member 133b via a pin 1341. The box 136 is fixed to the back of the ironing board 110. The box 136 includes a seat 1361 and a cover 1362. The seat 1361 is fixed to the back of the ironing board 110 by fasteners such as screws, and the cover 1362 is fastened to the seat 1361 by fasteners such as screws.

[0080] The handle 131 is assembled on the back of one end of the ironing board 110 through a pin shaft, which is convenient for the user to hold the ironing board and the handle at the same time to unlock and rotate the ironing board. A second elastic element such as a torsion spring acts on the handle to reset the handle.

[0081] like Fig.16As shown, the aforementioned ironing board adjustment mechanism 100 is applied to a hanging ironing machine, and the ironing board is suitable for laying clothes flat on the ironing board for ironing when it is flat or tilted, and is suitable for hanging clothes on the ironing board for ironing when it is upright. The hanging ironing machine includes a main unit 200 and a support structure 300. The support mechanism shown in the figure is a support rod. In other embodiments, the support mechanism can be two support rods. The base frame 121 of the ironing board adjustment mechanism is assembled on the upper end of the support structure 300. In other embodiments, the base frame and the support structure can be made as one body. Accordingly, when in use, the inclination angle of the ironing board is adjusted by the ironing board adjustment mechanism, steam is generated by the main unit and transported to the handheld ironing head through the steam pipe, and the steam is released from the handheld ironing head for ironing clothes.

[0082] The aforementioned ironing board adjustment mechanism can also be used as an ironing board by placing the frame on a folding bracket.

Claims

1. Ironing board adjustment mechanism, characterized by include: An ironing board (110) having a sliding structure (111); An angle adjustment mechanism (120) comprises a base frame (121) and a connecting rod (122), wherein the base frame (121) is rotationally connected to an ironing board via a first axis (a), the base frame (121) is rotationally connected to a first end of a connecting rod (122) via a second axis (b), the second end of the connecting rod (122) is slidingly connected to a sliding structure (111) of the ironing board via a third axis (c), the axial projection point (A) of the first axis, the axial projection point (B) of the second axis and the axial projection point (C) of the third axis are respectively located at the vertices of a triangle, wherein the ironing board (110) rotates around the first axis (a) to adjust its tilt angle, and the rotation of the ironing board around the first axis causes the connecting rod (122) to rotate around the second axis (b) and the third axis (c) to slide along the sliding structure (111) to change the shape of the triangle; A locking mechanism (130) locks and fixes the triangle to prevent the ironing board (110) from rotating around a first axis. The locking mechanism comprises a handle (131). The handle is manipulated to release the locking mechanism from fixing the triangle to allow the ironing board to rotate around the first axis.

2. The ironing board adjustment mechanism according to claim 1, characterized in that: The sliding structure (111) is a guide groove arranged on both sides of the ironing board and extending along the length direction of the ironing board, and the two ends of the third axis (c) are respectively located in the corresponding guide grooves.

3. The ironing board adjustment mechanism according to claim 1 or 2, characterized in that: The ironing board (110) is in an upright position, a horizontal position, or any inclined angle between the upright position and the horizontal position as the shape of the triangle changes; the distance between the first axis (a) and the third axis (c) gradually increases as the ironing board changes from an upright position to a horizontal position; when the ironing board is in an upright position, the first axis (a) is located below the third axis (c).

4. The ironing board adjustment mechanism according to claim 3, characterized in that: When the ironing board (110) is upright, the third axis (c) is located at one end of the sliding structure (111); when the ironing board (110) is horizontal, the third axis (c) is located at the other end of the sliding structure (111).

5. The ironing board adjustment mechanism according to claim 3, characterized in that: The base frame (121) comprises a supporting portion (1211), a first extending portion (1212) and a second extending portion (1213); the first extending portion (1212) extends forward from the supporting portion (1211), the second extending portion (1213) extends backward from the supporting portion (1211), the first axis (a) is located at the first extending portion (1212), and the second axis (b) is located at the second extending portion (1213); when the ironing board is placed flat, the first axis (a) is located at the front side of the supporting portion (1211), and the third axis (c) is located at the rear side of the supporting portion (1211).

6. The ironing board adjustment mechanism according to claim 5, characterized in that: The first extension portion (1212) is higher than the second extension portion (1213), the connecting rod (122) has a relief portion (1221), and the upper end of the supporting portion (1211) is located at the relief portion (1221) when the ironing board is upright.

7. The ironing board adjustment mechanism according to claim 1 or 2, characterized in that: The first shaft (a) and the third shaft (c) are both connected to the back side of the ironing board (110), and the front side of the ironing board faces forward when the ironing board is upright, and faces upward when the ironing board is flat.

8. The ironing board adjustment mechanism according to claim 1, characterized in that: The locking mechanism (130) is mounted on the back of the ironing board (110).

9. The ironing board adjustment mechanism according to claim 8, characterized in that: The locking mechanism (130) comprises: A slide bar (132) is arranged on the back of the ironing board (110) and extends along the length direction of the ironing board; A locking member is fixed to the back of the ironing board, and is sleeved on the slide bar through the through hole and locks the slide bar and the triangle by elastic force; An unlocking member (134) which cooperates with the handle (131) and the locking member; The operating handle links the unlocking member and the locking member to prompt the locking member to unlock the slide bar.

10. The ironing board adjustment mechanism according to claim 9, characterized in that: The locking piece locks the slide bar so that the edge of its through hole clamps the slide bar, and the locking piece unlocks the slide bar so that the edge of its through hole releases the slide bar.

11. The ironing board adjustment mechanism according to claim 9, characterized in that: The locking mechanism (130) further comprises a linkage member (135); the handle (131) is located at one end of the ironing board (110); and the linkage member (135) is connected between the handle (131) and the unlocking member (134) to realize linkage between the handle and the unlocking member.

12. The ironing board adjustment mechanism according to claim 9, characterized in that: The unlocking member (134) is rotatably arranged on the back of the ironing board and is rotatably matched with the locking member.

13. The ironing board adjustment mechanism according to claim 9, characterized in that: The locking member comprises a first locking member (133a) and a second locking member (133b), and the locking directions of the first locking member and the second locking member are opposite.

14. The ironing board adjustment mechanism according to claim 9, characterized in that: One end of the sliding rod (132) is connected to the third shaft (c).

15. The ironing board adjustment mechanism according to any one of claims 8 to 14, characterized in that: The locking piece is an elastic component and provides elastic force for locking the sliding rod.

16. The ironing board adjustment mechanism according to any one of claims 8 to 14, characterized in that: A first elastic element acts on the locking member, and the first elastic element provides elastic force for locking the sliding rod.

17. The ironing board adjustment mechanism according to any one of claims 9 to 14, characterized in that: The locking part and the unlocking part are located in the middle part of the back side of the ironing board.

18. The ironing board adjustment mechanism according to claim 17, characterized in that: The locking member and the unlocking member are located in a box (136) which is fixed to the back of the ironing board.

19. The ironing board adjustment mechanism according to claim 1, characterized in that: A second elastic element acts on the handle.

20. A garment steamer, comprising a main unit (200) and a supporting structure (300), characterized in that: It also comprises the ironing board adjustment mechanism (100) according to any one of claims 1 to 19, wherein the base frame (121) and the supporting structure (300) are made as one body or the base frame is assembled on the supporting structure.

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