Handrail height adjustment mechanism and crib

Abstract

The application provides a height adjustment mechanism of an armrest and a baby crib. The height adjustment mechanism of the armrest comprises a fixed seat and a sliding seat. The fixed seat is used to be connected with a bed body. The fixed seat is provided with a sliding groove. The sliding groove comprises a wide part and a narrow part. The sliding seat comprises a guide rail part, a connecting part and a transition part. The two ends of the transition part in a first direction are connected with the guide rail part and the connecting part respectively. The guide rail part is slidably arranged in the wide part. The transition part is slidably arranged in the narrow part. The connecting part is arranged outside the sliding groove and is used to be connected with the armrest. The sliding seat can slide along the sliding groove so as to be lifted or lowered relative to the fixed seat. The guide rail part comprises a first circular arc and a second circular arc. The radian of the first circular arc is θ1. The radian of the second circular arc is θ2. θ1> θ2. The height adjustment mechanism of the armrest of the application can reduce the risk of the sliding seat being separated from the sliding groove, thereby reducing the risk of the bed body and the armrest of the baby crib being separated from each other.

Description

Technical Field

[0001] This application relates to the field of crib technology, and more particularly to an armrest height adjustment mechanism and a crib. Background Technology

[0002] Some cribs on the market have armrests that can be raised and lowered relative to the crib frame. When putting or taking the baby into or out of the crib, the user (e.g., the baby's parents) can lower the armrests to prevent injury to the baby and to avoid obstructing the user's hands from reaching into or out of the crib. When the baby is in the crib, the user can raise the armrests to prevent the baby from falling off. The sliding connection between the armrests and the crib frame is generally as follows: the armrest connects to a sliding seat, the crib frame connects to a fixed seat, the fixed seat has a groove, and part of the sliding seat is located within the groove. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes an armrest height adjustment mechanism that can reduce the risk of the sliding seat disengaging from the slide groove.

[0004] This application also proposes a crib that includes the above-mentioned armrest height adjustment mechanism.

[0005] According to a first aspect embodiment of the present application, an armrest height adjustment mechanism includes: a fixed seat for connecting to the bed body, the fixed seat being provided with a sliding groove, the sliding groove including a wide portion and a narrow portion, one end of the wide portion communicating with the narrow portion in a first direction, the dimension of the wide portion in a second direction being W1, the dimension of the narrow portion in the second direction being W2, W1 > W2, and any two of the second direction, the first direction, and the extension direction of the sliding groove being perpendicular to each other; a sliding seat including a guide rail portion, a connecting portion, and a transition portion, the two ends of the transition portion in the first direction being respectively connected to the guide rail portion and the connecting portion, the guide rail portion being slidably disposed in the wide portion, the transition portion being slidably disposed in the narrow portion, and the connecting portion being... The sliding seat is disposed outside the slide groove and used to connect with the handrail. The sliding seat can slide along the slide groove to rise and fall relative to the fixed seat. The surface of the guide rail portion near the transition portion is a first limiting surface, and the wall surface of the wide portion near the narrow portion is a second limiting surface. The first limiting surface and the second limiting surface abut against each other to prevent the guide rail portion from disengaging from the slide groove. The guide rail portion includes a first arc and a second arc. The top surface of the guide rail portion is connected to the top end of the first limiting surface through the first arc, and the bottom surface of the guide rail portion is connected to the surface of the guide rail portion opposite to the transition portion through the second arc. The angle of the first arc is θ1, and the angle between the second arc and the bottom surface is θ2, where θ2 > θ1.

[0006] The armrest height adjustment mechanism according to the first aspect of this application has at least the following beneficial effects:

[0007] During the use of a crib, the crib frame may tilt, and correspondingly, the fixed seat and sliding seat will also tilt. If the sliding seat slides along the fixed seat, the angle between the sliding direction and the vertical direction is acute. However, due to user habits, even when the crib is tilted, the user may still pull the armrests vertically upwards. Before the guide rails have disengaged from the tracks, when the user pulls the armrests vertically upwards, the armrests and sliding seat will still slide along the track's extension direction. However, because there is an angle between the user's applied force and the armrest's sliding direction, the external force applied to the armrests will eventually be transmitted to the sliding seat, forming a component force that drives the sliding seat laterally. This component force risks causing the guide rails to move laterally and disengage from the tracks.

[0008] When the slide is tilted, pulling the handrail upwards makes it easier to disengage the sliding seat from the slide than pulling it downwards. If the handrail is pulled vertically upwards by the user, the first arc may contact the second limiting surface; if the handrail is pulled vertically downwards by the user, the junction of the second arc and the bottom surface of the guide rail may contact the other side wall of the slide. Because θ2 is smaller, the sharpness of the junction between the side surface of the guide rail facing away from the transition section and the bottom surface of the guide rail is lower, making it less likely for the second arc to jam against the wall of the slide when the guide rail slides downwards, resulting in less resistance from the wall of the slide when the guide rail slides downwards. Similarly, because θ1 is larger, the sharpness of the junction between the top surface of the guide rail and the first limiting surface is greater, resulting in greater resistance from the wall of the slide when the guide rail slides upwards. As a result, the lateral resistance from the wall of the slide when the guide rail slides upwards is also greater, making it less likely for the guide rail to disengage laterally from the slide.

[0009] According to some embodiments of this application, the dimension of the guide rail in the first direction is L1, where L1≥8mm, θ1≥1.4 rad, and θ2≤0.9 rad. This embodiment reduces the risk of deformation of the guide rail and the slide rail by increasing the dimension of the guide rail in the first direction and by reasonably setting the values ​​of θ1 and θ2, thereby reducing the risk of the guide rail detaching from the slide rail.

[0010] According to some embodiments of this application, the guide rail portion includes a first side surface and a second side surface, which are respectively disposed at both ends of the guide rail portion in the second direction. The guide rail portion further includes a fourth arc and two fourth arcs. The top ends of the first side surface and the second side surface are connected by the fourth arcs. The bottom end of the first side surface is connected to the second arc through one of the fourth arcs, and the bottom end of the second side surface is connected to the second arc through the other fourth arc. The radius of each fourth arc is larger than the radius of the second arc. This embodiment can improve the smoothness of the guide rail portion sliding along the groove.

[0011] According to some embodiments of this application, the outer surface of the fixing seat includes opposing surfaces, which are disposed opposite to the second limiting surface. The minimum distance between the opposing surfaces and the second limiting surface in the first direction is L2, where L2 ≥ L1 / 3. This embodiment can avoid the thickness of the part of the fixing seat that abuts against the guide rail being too small, thereby reducing the risk of the guide rail disengaging from the slide groove due to deformation of the fixing seat.

[0012] According to some embodiments of this application, the guide rail includes: a main body connected to the transition portion, wherein the first limiting surface is disposed on the main body; a longitudinal rib connected to the side surface of the main body opposite to the transition portion; and a transverse rib connected to the side surface of the main body opposite to the transition portion. The transverse rib is perpendicular to the extending direction of the slide groove, and the transverse rib and the longitudinal rib intersect each other. The transverse rib, the longitudinal rib, and the main body together define a plurality of weight-reducing grooves. This embodiment helps to reduce the cost of the sliding seat and save the user the effort required to pull the armrest.

[0013] According to some embodiments of this application, the dimension of the main body in the first direction is L3, where L3 ≥ L1 / 3. This embodiment can avoid the main body being too thin, thereby avoiding insufficient overall deformation resistance of the guide rail and reducing the risk of the guide rail detaching from the groove.

[0014] According to some embodiments of this application, the dimension of the longitudinal rib in the second direction is W3, where W3 ≥ 2.5 mm. This embodiment can prevent the thickness of the longitudinal rib from being too small, thus affecting the overall deformation resistance of the guide rail.

[0015] According to some embodiments of this application, a total of n weight-reducing grooves are provided, where n is an even number greater than zero. Each of the longitudinal ribs has n / 2 weight-reducing grooves on both sides in the second direction. The guide rail portion has a dimension H1 in the extension direction of the slide groove, and the dimension of a single weight-reducing groove in the extension direction of the slide groove is H2, where (n / 2)·H2≤0.7H1. This embodiment can prevent the guide rail portion from having poor resistance to deformation due to excessively large weight-reducing groove height.

[0016] According to some embodiments of this application, the dimension of the transverse rib in the extension direction of the slide groove is H3, where H3 ≥ 2.5 mm. This embodiment can prevent the thickness of the transverse rib from being too small, thus affecting the overall deformation resistance of the guide rail.

[0017] According to some embodiments of this application, the dimension of the guide rail portion in the extension direction of the slide groove is H1, where 4 ≤ H1 / L1 ≤ 8. This embodiment helps to reduce the risk of the guide rail portion disengaging from the slide groove and also helps to avoid the sliding range of the sliding seat being too small.

[0018] According to some embodiments of this application, the first limiting surface includes a first region and a second region. The first region and the second region are distributed along the second direction and are respectively disposed on different sides of the transition portion. The dimension of the first region in the second direction is W6, the dimension of the second region in the second direction is W4, and the dimension of the transition portion in the second direction is W5, where W6=W4, W5≤W4≤2W5. This embodiment can, on the one hand, prevent the width of the first region and the second region from being too small, thereby reducing the risk of the guide rail part disengaging from the slide groove; on the other hand, it can prevent the width of the first region 306 and the second region from being too large, thereby reducing the risk of the guide rail part disengaging from the slide groove.

[0019] A crib according to a second aspect of this application includes: an armrest height adjustment mechanism as described in the first aspect embodiment; an armrest fixedly connected to the sliding seat; and a bed body fixedly connected to the fixed seat, wherein the armrest and the bed body together define a space for accommodating an infant.

[0020] The crib according to the second aspect of this application has at least the following advantages: the height of the crib's armrests is adjustable, making it convenient for users to put the baby into or take the baby out of the crib; moreover, when the slide is tilted, the armrests and the crib body are not easily separated from each other because the sliding seat and the fixed seat of the armrest height adjustment mechanism are not easily separated from each other.

[0021] According to some embodiments of this application, the bed frame has a first end and a second end at its two ends in the first direction, and two armrests are provided, each mounted on one end of the bed frame along the second direction. The crib further includes: a first support assembly comprising a first fixed frame and a first movable frame slidably connected to each other, the first movable frame being rotatably connected to the first end; and a second support assembly comprising a second fixed frame and a second movable frame slidably connected to each other, the second movable frame being rotatably connected to the second end. The first movable frame can be raised and lowered relative to the first fixed frame, and the second movable frame can be raised and lowered relative to the second fixed frame, so that the crib can switch between a first state and a second state. When the crib is in the first state, the first end and the second end are at the same height; when the crib is in the second state, the first end is higher than the second end, or the second end is higher than the first end. The advantage of this embodiment is that the user can adjust the crib to the second state, so that the end of the bed frame corresponding to the baby's head is in a higher position, and the end of the bed frame corresponding to the baby's feet is in a lower position. In this way, the baby can lean against the bed frame at an angle, which is convenient for the user to feed the baby food or water.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of a crib in one embodiment of this application (the crib is in a first state).

[0025] Figure 2 for Figure 1 Enlarged view of region A in the middle;

[0026] Figure 3 for Figure 2 The front view of the sliding seat in the middle;

[0027] Figure 4 for Figure 2 A three-dimensional view of the sliding seat in the middle;

[0028] Figure 5 for Figure 2 Left view of the sliding seat in the middle;

[0029] Figure 6 for Figure 2 A schematic diagram showing the fit between the sliding seat and the fixed seat;

[0030] Figure 7 for Figure 2 A schematic diagram of the mating relationship between the sliding seat and the fixed seat from another perspective;

[0031] Figure 8 for Figure 7 A schematic diagram of the sliding seat and fixed seat after tilting;

[0032] Figure 9 for Figure 1 Enlarged view of region B in the middle;

[0033] Figure 10 for Figure 1 Enlarged view of region C in the middle;

[0034] Figure 11 for Figure 1 Front view of the crib (crib in first position).

[0035] Figure 12 for Figure 11 The main view after the crib in the game switches to the second state.

[0036] Figure label:

[0037] 100-Crib, 101-Armrest height adjustment mechanism, 102-Fixed seat, 103-Sliding seat, 104-Armrest, 105-Crib body, 106-Space, 107-First support assembly, 108-First fixed frame, 109-First movable frame, 110-Second support assembly, 111-Second fixed frame, 112-Second movable frame;

[0038] 201-Connecting part, 202-Transition part, 203-Guide rail part, 204-Weight reduction groove, 205-First arc, 206-Second arc, 207-First limiting surface, 209-Upper stop block, 210-Transverse rib, 211-Longitudinal rib, 212-Lower stop block, 213-Main body, 214-First side, 215-Second side, 216-Third arc, 217-Fourth arc;

[0039] 301-First shell, 302-Second shell, 303-Wide portion, 304-Narrow portion, 305-Slide groove, 306-First region, 307-Second region, 308-Second limiting surface, 309-Opposite surface, 310-Flange;

[0040] 401-Positioning component, 402-Elastic component, 403-Linkage component, 404-Positioning hole, 405-Snap-fit ​​hole, 406-Snap fastener;

[0041] 501 - First end, 502 - Second end. Detailed Implementation

[0042] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0043] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0045] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution. During the use of the crib 100, the user may adjust the crib body 105 to a tilted usage mode (the tilted usage mode will be described in detail below). When the crib body 105 is tilted relative to the horizontal plane, the sliding direction of the slide rail 305 is also tilted (e.g., ...). Figure 8 (As shown). When the user pulls the handrail 104, it is difficult to pull the handrail 104 precisely along the sliding direction of the slide groove 305. At this time, there is a certain angle between the movement direction of the handrail 104 and the extension direction of the slide groove 305. When the user pulls the handrail in the vertical direction, it may cause the sliding seat 103 to move laterally, thereby causing the sliding seat 103 to disengage from the opening of the slide groove 305.

[0046] The crib 100 of this application is intended to solve the above-mentioned problems. Figure 1 A crib 100 is shown in one embodiment of this application, in conjunction with Figure 1 and Figure 2 The crib 100 includes an armrest height adjustment mechanism 101, which includes a fixed base 102 and a sliding base 103 slidably connected to the fixed base 102. Figure 1As shown, the sliding seat 103 is connected to the armrest 104 of the crib 100, and the fixed seat 102 is connected to the crib body 105 of the crib 100. The sliding seat 103 slides relative to the fixed seat 102, thereby causing relative movement between the armrest 104 and the crib body 105. The crib body 105 and the armrest 104 together define a space 106 for accommodating an infant. Figure 6 The diagram shows the mating relationship between the sliding groove 305 and the sliding seat 103 from a top-down perspective. Figure 7 This illustrates the mating relationship between the sliding groove 305 and the sliding seat 103 from another perspective. (For example...) Figure 6 As shown, the fixed base 102 is provided with a sliding groove 305, which includes a wide portion 303 and a narrow portion 304. One end (right end) of the wide portion 303 along the first direction is connected to the narrow portion 304. Furthermore, if the dimension of the wide portion 303 in the second direction is denoted as W1, and the dimension of the narrow portion 304 in the second direction is denoted as W2, then W1 > W2. The first direction, the second direction, and the extension direction of the sliding groove 305 are perpendicular to each other. The first direction corresponds to direction D1 in the attached drawing, the second direction corresponds to direction D2 in the attached drawing, and the extension direction of the sliding groove 305 corresponds to direction D3 in the attached drawing. Figure 1 In the middle, the slide groove 305 extends in the vertical direction. Figure 1 and Figure 6 In the middle, the first direction corresponds to the left and right directions, and the second direction corresponds to the front and back directions.

[0047] Reference Figure 3 and Figure 4 The sliding seat 103 includes a guide rail portion 203, a connecting portion 201, and a transition portion 202, and the sliding seat 103 may be integrally formed. The transition portion 202 is disposed between the guide rail portion 203 and the connecting portion 201, and its two ends in a first direction are connected to the guide rail portion 203 and the connecting portion 201, respectively. More specifically, the left end of the transition portion 202 is connected to the guide rail portion 203, and the right end of the transition portion 202 is connected to the connecting portion 201. (Refer to...) Figure 6 The guide rail portion 203 is larger in the second direction than the transition portion 202. The guide rail portion 203 is slidably disposed in the wide portion 303 of the slide groove 305, while the transition portion 202 is slidably disposed in the narrow portion 304 of the slide groove 305. The connecting portion 201 is disposed outside the slide groove 305 and is used to connect with the handrail 104 (e.g., Figure 2 (As shown). Refer to... Figure 3 and Figure 6 The end face of the guide rail portion 203 near the transition portion 202 is a first limiting surface 207, and the wall surface of the wide portion 303 near the narrow portion 304 is a second limiting surface 308. The second limiting surface 308 can abut against the first limiting surface 207, thereby preventing the guide rail portion 203 from disengaging from the slide groove 305. For ease of illustration, the first limiting surface 207 and the second limiting surface 308 are shown separately. Figure 6 A large gap is left between the first limiting surface 207 and the second limiting surface 308; in actual use, the first limiting surface 207 and the second limiting surface 308 can abut. Both the sliding seat 103 and the fixed seat 102 can be made of plastic, and can be made of the same material.

[0048] It should be noted that the mounting base 102 can be assembled from multiple parts so that the guide rail 203 can be installed into the wide portion 303. For example, see reference... Figure 6 The fixed base 102 includes a first housing 301 and a second housing 302, which are distributed along a second direction and are connected by detachable connection methods such as snap-fit ​​or screw connection. The first housing 301 has a first groove, and the second housing 302 has a second groove. After the first housing 301 and the second housing 302 are assembled together, the first groove and the second groove communicate with each other to form a sliding groove 305. The assembly process of the fixed base 102 and the sliding base 103 is roughly as follows: first, the guide rail portion 203 of the fixed base 102 is placed into the first groove of the first housing 301; then, the second housing 302 is placed over the front of the guide rail portion 203; and finally, the first housing 301 and the second housing 302 are fixed together. In this way, the sliding base 103 and the fixed base 102 can be assembled together.

[0049] Reference Figure 3 The guide rail portion 203 includes a first arc 205 and a second arc 206. The top surface of the guide rail portion 203 is connected to the top end of the first limiting surface 207 via the first arc 205, and the bottom surface of the guide rail portion 203 is connected to the side surface of the guide rail portion 203 opposite to the transition portion via the second arc 206. The end of the second arc 206 away from the bottom surface (left end) is higher than the end of the second arc 206 near the bottom surface (right end). If the angle of the first arc 205 is denoted as θ1, and the angle between the second arc 206 and the bottom surface of the guide rail portion 203 is denoted as θ2, then θ1 > θ2.

[0050] The tilted fixed seat 102 and sliding seat 103 are as follows Figure 8 As shown, if the sliding seat 103 slides along the fixed seat 102, the angle between the sliding direction of the sliding seat 103 and the vertical direction is an acute angle. In this case, pulling the handle 104 upwards makes it easier for the sliding seat 103 to disengage from the slide groove 305 than pulling it downwards. Combined with... Figure 3 and Figure 8When the slide 305 is tilted, if the handrail 104 is pulled vertically upward by the user, the first arc 205 may come into contact with the second limiting surface 308; if the handrail 104 is pulled vertically downward by the user, the junction of the second arc 206 and the bottom surface of the guide rail 203 may come into contact with the other side wall of the slide 305. Because θ2 is small, the sharpness of the junction of the second arc 206 and the bottom surface of the guide rail 203 is low, and the third arc 216 is not easy to jam against the wall of the slide 305 when the guide rail 203 slides downward along the slide 305. The resistance exerted by the wall of the slide 305 on the guide rail 203 when the guide rail 203 slides downward along the slide 305 is small. Similarly, because θ1 is relatively large, the junction between the top surface of the guide rail portion 203 and the first limiting surface 207 is relatively sharp, resulting in greater resistance exerted by the wall of the slide groove 305 on the guide rail portion 203 when it slides upward along the slide groove 305. Consequently, the lateral resistance exerted by the wall of the slide groove 305 on the guide rail portion 203 is also greater when it slides upward, making it difficult for the guide rail portion 203 to laterally disengage from the slide groove 305.

[0051] like Figure 8 As shown, due to user habits, even when the crib 100 is tilted, the user may still pull the armrest 104 vertically upwards. When the guide rail 203 is still in the slide groove 305, the armrest 104 and the sliding seat 103 will still slide along the extending direction of the slide groove 305 when the user pulls the armrest 104 vertically upwards. However, as... Figure 8 As shown, since there is a certain angle between the direction of the user's force and the sliding direction of the armrest 104, the external force applied by the user to the armrest 104 will eventually be transmitted to the sliding seat 103 and form a component force that drives the sliding seat 103 to move to the upper right. This component force increases the contact force between the guide rail 203 and the right side wall of the slide groove 305, making it easier for the guide rail 203 to bend to the left or undergo other types of deformation (compared to the case when the slide groove 305 is vertically set).

[0052] In the prior art, the guide rail portion 203 is generally flat, and the thickness of the guide rail portion 203 (the dimension of the guide rail portion 203 in the first direction) is basically less than 3mm, so as to avoid the guide rail portion 203 being too heavy and increasing the resistance when sliding. However, under this size condition, the guide rail portion 203 has weak resistance to deformation, and the guide rail portion 203 is at higher risk of deformation due to pressure from the wall of the slide groove 305. When the slide groove 305 is tilted and the user pulls the armrest 104 vertically upward, the guide rail portion 203 is at higher risk of deformation and being squeezed out of the slide groove 305.

[0053] like Figure 3As shown, the guide rail portion 203 of this application has a dimension L1 in the first direction, where L1 ≥ 8 mm. By increasing the dimension of the guide rail portion 203 in the first direction, this application reduces the risk of the guide rail portion 203 deforming and being squeezed out of the slide groove 305 when pressed by the wall of the slide groove 305. This reduces the risk of the sliding seat 103 disengaging from the slide groove 305 when the slide groove 305 is tilted and the user pulls the armrest 104 vertically upward. Simultaneously, θ1 and θ2 satisfy: θ1 ≥ 1.4 rad, θ2 ≤ 0.9 rad. θ1 should not be less than 1.4 rad; otherwise, the junction between the top surface of the guide rail portion 203 and the first limiting surface 207 will be too sharp, and stress concentration may occur on the second limiting surface 308 used to abut against the first arc 205. The slide groove 305 will easily deform, resulting in an excessively large opening in the slide groove 305, and a higher risk of the guide rail portion 203 disengaging from the slide groove 305. If the guide rail 203 gets stuck while sliding downwards when the slide 305 is tilted, the guide rail 203 may rotate (with the intersection of the bottom surface of the guide rail 203 and the second arc 206 as the fulcrum), which increases the risk of the guide rail 203 dislodging from the slide 305; θ2 not less than 0.9 rad can keep the sharpness of the intersection of the bottom surface of the guide rail 203 and the second arc 206 at a low level, so as to avoid excessive resistance to the downward sliding of the guide rail 203.

[0054] Reference Figure 5 The guide rail portion 203 includes a first side surface 214 and a second side surface 215, which are respectively disposed at both ends of the guide rail portion 203 in a second direction. The guide rail portion 203 also includes a third arc 216 and two fourth arcs 217. The top ends of the first side surface 214 and the second side surface 215 are connected by the third arc 216. The bottom end of the first side surface 214 is connected to the second arc 206 by one of the fourth arcs 217, and the bottom end of the second side surface 215 is connected to the second arc 206 by the other fourth arc 217. The radius of the third arc 216 is larger than the radius of the fourth arcs 217. The third arc 216 is also the top surface of the guide rail portion 203. In some embodiments, the radius of the third arc 216 can be twice or more the radius of the fourth arc 217. This allows the guide rail portion 203 to slide upwards more smoothly when the slide groove 305 is not tilted.

[0055] Reference Figure 6The outer surface of the fixed seat 102 includes a facing surface 309, which is disposed opposite to the second limiting surface 308. The minimum distance between the facing surface 309 and the second limiting surface 308 in the first direction is L2. In some embodiments, L2 satisfies: L2≥L1 / 3. This arrangement also helps to reduce the risk of the sliding seat 103 disengaging from the slide groove 305. Specifically, as described above, when the slide groove 305 is inclined relative to the vertical direction and the user pulls the armrest 104 in the vertical direction, the interaction force between the guide rail portion 203 and the wall of the slide groove 305 increases; in this case, the risk of deformation of the fixed seat 102 also increases, and the fixed seat 102 being squeezed and deformed by the guide rail portion 203 may cause the narrow portion 304 to become larger, thereby causing the guide rail portion 203 to protrude from the narrow portion 304 to the outside of the slide groove 305. If L2 is not less than one-third of L1, the thickness of the part of the fixing seat 102 that abuts against the guide rail 203 will not be too small, thereby reducing the risk that the guide rail 203 will disengage from the slide groove 305 due to deformation of the fixing seat 102.

[0056] Reference Figure 4 and Figure 5 The guide rail section 203 includes a main body 213, longitudinal ribs 211, and transverse ribs 210. The main body 213 is plate-shaped and is used to connect with the transition section 202. The side surface of the main body 213 facing the second limiting surface 308 is the first limiting surface 207. The longitudinal ribs 211 and transverse ribs 210 are both connected to the side surface of the main body 213 facing away from the transition section 202. The transverse ribs 210 are perpendicular to the extending direction of the slide groove 305. The transverse ribs 210 and longitudinal ribs 211 intersect each other, and the longitudinal ribs 211, transverse ribs 210, and main body 213 together define a plurality of weight-reducing grooves 204.

[0057] The weight-reducing groove 204 helps reduce the amount of material used in the guide rail 203, thereby reducing the cost of the sliding seat 103. Furthermore, the weight-reducing groove 204 also reduces the weight of the guide rail 203, making it easier for the user to pull the armrest 104. Moreover, with the interlaced longitudinal ribs 211 and transverse ribs 210, the guide rail 203 has stronger torsional and deformation resistance, which also helps reduce the risk of the guide rail 203 deforming and detaching from the groove 305.

[0058] Reference Figure 4 and Figure 5 The guide rail section 203 also includes an upper stop 209 and a lower stop 212. The upper stop 209 is connected to the top of the main body 213 and to the top of the longitudinal rib 211, while the lower stop 212 is connected to the bottom of the main body 213 and to the bottom of the longitudinal rib 211. The upper stop 209 and the lower stop are used to constrain the deformation of the longitudinal rib 211, thereby enhancing the deformation resistance of the guide rail section 203.

[0059] In some embodiments, a total of n weight-reducing grooves 204 are provided, where n is an even number greater than 0. The longitudinal ribs 211 have n / 2 weight-reducing grooves 204 on each side in the second direction, such as... Figure 5 As shown, the dimension of the guide rail 203 in the extending direction of the slide groove 305 is H1, and the dimension of the weight reduction groove 204 in the extending direction of the slide groove 305 is H2. H1 and H2 satisfy: (n / 2)·H2≤0.7H1. Figure 5 For example, there are a total of 4 weight-reducing grooves 204, with 2 weight-reducing grooves 204 on the front and 2 on the rear sides of the longitudinal rib 211. H1 can also be understood as the height of the guide rail 203, and H2 can also be understood as the height of the weight-reducing groove 204. This arrangement helps to avoid the height ratio of the weight-reducing groove 204, so as to prevent the guide rail 203 from having poor resistance to deformation due to the excessive height of the weight-reducing groove 204.

[0060] In some embodiments, 4 ≤ H1 / L1 ≤ 8. If H1 / L1 is less than 4, the height of the guide rail portion 203 is small, the contact area between the first limiting surface 207 and the second limiting surface 308 is small, the limiting effect of the second limiting surface 308 on the guide rail portion 203 is poor, and the risk of the guide rail portion 203 disengaging from the slide groove 305 is high. If H1 / L1 is greater than 8, the height of the guide rail portion 203 is too high, and the actual range of motion of the sliding seat 103 will be smaller when the length of the slide groove 305 remains unchanged. Therefore, the setting of 4 ≤ H1 / L1 ≤ 8 is beneficial to reducing the risk of the guide rail portion 203 disengaging from the slide groove 305 on the one hand, and to avoiding an excessively small sliding range of the sliding seat 103 on the other hand.

[0061] Reference Figure 3 If the dimension of the main body 213 in the first direction is denoted as L3 (L3 can also be understood as the thickness of the main body 213), then in some embodiments, L3 can satisfy: L3≥L1 / 3. Since the main body 213 is the part of the guide rail 203 that directly contacts the second limiting surface 308, L3 not being less than one-third of L1 can avoid the main body 213 being too thin, thereby avoiding insufficient overall deformation resistance of the guide rail 203.

[0062] Reference Figure 5 The dimension of the transverse rib 210 in the extending direction of the slide groove 305 is H3, which can also be understood as the thickness of the transverse rib 210. In some embodiments, H3 ≥ 2.5 mm, so as to avoid the transverse rib 210 being too thin and affecting the overall deformation resistance of the guide rail portion 203. Similarly, referring to... Figure 5 The longitudinal rib 211 has a dimension of W3 in the second direction. W3 can also be understood as the thickness of the longitudinal rib 211. In some embodiments, W3 ≥ 2.5 mm, so as to avoid the longitudinal rib 211 being too thin and affecting the overall deformation resistance of the guide rail part 203.

[0063] Reference Figure 6 The first limiting surface 207 includes a first region 306 and a second region 307, which are distributed along a second direction and respectively disposed on different sides of the transition portion 202. Figure 6 For example, the first region 306 is located on the rear side of the transition portion 202, and the second region 307 is located on the front side of the transition portion 202. The dimension of the first region 306 in the second direction is W6 (i.e., the width of the first region 306), the dimension of the second region 307 in the second direction is W4 (i.e., the width of the second region 307), and the dimension of the transition portion 202 in the second direction is W5. In some embodiments, W6, W4, and W5 satisfy: W6=W4, W5≤W4≤2W5. The first region 306 and the second region 307 are the main regions in the first limiting surface 207 that abut against the second limiting surface 308. If the width of the first region 306 and the second region 307 is too small, the guide rail portion 203 will only need a small deformation to disengage from the slide groove 305. The setting of W5≤W4 can prevent the width of the first region 306 and the second region 307 from being too small, thereby reducing the risk of the guide rail portion 203 disengaging from the slide groove 305. Furthermore, the larger the width of the first region 306 and the second region 307, the larger the size of the flange 310 of the fixing seat 102 in the second direction, the larger the torque generated by the force exerted by the guide rail portion 203 on the flange 310, and the more easily the flange 310 bends outward, resulting in a larger opening of the narrow portion 304, and the guide rail portion 203 is more likely to disengage from the slide groove 305; W4≤2W5 can prevent the width of the first region 306 and the second region 307 from being too large, thereby reducing the risk of the guide rail portion 203 disengaging from the slide groove 305.

[0064] Reference Figure 7 The handrail height adjustment mechanism 101 also includes a positioning element 401 and an elastic element 402. One end of the elastic element 402 is connected to the positioning element 401, and the other end of the elastic element 402 is connected to the connecting part 201 or the handrail 104. The fixed base 102 also includes a positioning hole 404. Figure 9The positioning hole 404 and the slide groove 305 are connected, but in some embodiments, the positioning hole 404 and the slide groove 305 may not be connected. Multiple positioning holes 404 are provided (at least two), and the multiple positioning holes 404 are spaced apart along the extending direction of the slide groove 305. An elastic member 402 is used to drive the positioning member 401 into the positioning hole 404 and to hold the positioning member 401 in the positioning hole 404. For example, when the positioning member 401 is aligned with the positioning hole 404, the outer surface of the fixing seat 102 abuts against the positioning member 401, and the elastic member 402 is in a compressed state; as the armrest 104 rises and falls, after the positioning member 401 is aligned with the positioning hole 404, the elastic force of the elastic member 402 drives the positioning member 401 to move to the left and insert into the positioning hole 404. After the positioning member 401 is inserted into the positioning hole 404, the height of the armrest 104 is fixed. With the positioning element 401 and the elastic element 402 provided, the handrail height adjustment mechanism 101 also has the function of fixing the handrail 104 at at least two different heights, so that the user does not need to hold the handrail 104 with his / her hand to keep the handrail 104 at the required height.

[0065] Reference Figure 7 In one embodiment, the armrest height adjustment mechanism 101 may further include a linkage component 403. One end of the linkage component 403 is connected to the positioning member 401, and the other end of the linkage component 403 protrudes outside the armrest 104 and the connecting portion 201. The user can grasp the exposed end of the linkage component 403 and pull it to remove the positioning member 401 from the positioning hole 404. After the positioning member 401 is removed from the positioning hole 404, the sliding seat 103 can slide again relative to the fixed seat 102. The linkage component 403 may be a rope, rod, or the like.

[0066] like Figure 1As shown, this application also provides a crib 100, which includes a crib body 105, armrests 104, a support assembly, and an armrest height adjustment mechanism 101 as described in any of the above embodiments. A sliding seat 103 is connected to the armrests 104 of the crib 100, and a fixed seat 102 is connected to the crib body 105 of the crib 100. The crib body 105 and the armrests 104 together define a space 106 for accommodating an infant. The support assembly is fixedly connected to the crib body 105 and is used to support the crib body 105. The bottom of the support assembly can be placed on the ground. The support assembly includes a first support assembly 107 and a second support assembly 110. A first end 501 of the crib body 105 is fixedly connected to the first support assembly 107, and a second end 502 of the crib body 105 is fixedly connected to the second support assembly 110. Both the first support assembly 107 and the second support assembly 110 are telescopic, and the telescopic movement of the first support assembly 107 and the second support assembly 110 is independent of each other. Therefore, the first support assembly 107 and the second support assembly 110 can adjust the overall height of the crib 105 and the angle of the crib 105 relative to the horizontal direction. The armrest 104 of the crib 100 is height-adjustable, making it convenient for users to put the baby into or take the baby out of the crib 100. Moreover, when the slide 305 is tilted, since the sliding seat 103 and the fixed seat 102 of the armrest height adjustment mechanism 101 are not easily separated from each other, the armrest 104 and the crib 105 of the crib 100 are also not easily separated from each other.

[0067] It should be noted that the crib 100 also includes fabric covering the crib frame 105 and armrests 104, which are not specifically shown in the attached drawings.

[0068] Reference Figure 1 In one embodiment, the crib 100 further includes a first support assembly 107 and a second support assembly 110. The first support assembly 107 includes a first fixed frame 108 and a first movable frame 109 slidably connected to each other, the first movable frame 109 being connected to a first end 501 of the crib body 105; the second support assembly 110 includes a second fixed frame 111 and a second movable frame 112 slidably connected to each other, the second movable frame 112 being connected to a second end 502 of the crib body 105. The crib body 105 has a first end 501 and a second end 502 at its two ends in a first direction, and two armrests 104 are provided, each mounted at one end of the crib body 105 in a second direction. The bottoms of the first fixed frame 108 and the second fixed frame 111 can be placed on the ground. The first movable frame 109 is movable relative to the first fixed frame 108, and the second movable frame 112 is movable relative to the second fixed frame 111. (See reference...) Figure 10The first fixed frame 108 is provided with a plurality of vertically distributed snap-fit ​​holes 405. A portion of the first movable frame 109 is slidably inserted inside the first fixed frame 108, and another portion of the first movable frame 109 protrudes from the top opening of the first fixed frame 108. The first support assembly 107 also includes a buckle 406, which is connected to the first movable frame 109. When the buckle 406 is engaged in one of the snap-fit ​​holes 405, the first movable frame 109 and the first fixed frame 108 are relatively fixed; when the buckle 406 is not engaged in any of the snap-fit ​​holes 405, the buckle 406 is located inside the first fixed frame 108, and the first movable frame 109 can slide up and down relative to the first fixed frame 108. The connection between the second fixed frame 111 and the second movable frame 112 is similar to the connection between the first fixed frame 108 and the first movable frame 109, and will not be described again here.

[0069] The first movable frame 109 is adjustable relative to the first fixed frame 108, and the second movable frame 112 is adjustable relative to the second fixed frame 111, so that the crib 100 can switch between a first state and a second state. Figure 11 As shown, when the crib 100 is in the first state, the first end 501 and the second end 502 are at the same height, and the crib body 105 is horizontally positioned. Figure 12 As shown, when the crib 100 is in the second state, the first end 501 is higher than the second end 502, or the second end 502 is higher than the first end 501, and the crib body 105 is tilted. The user can adjust the crib 100 to the second state, so that the end of the crib body 105 corresponding to the baby's head is in a higher position, and the end of the crib body 105 corresponding to the baby's feet is in a lower position. In this way, the baby can lean against the crib body 105 at an angle, which makes it convenient for the user to feed the baby food or water.

[0070] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A height adjustment mechanism for adjusting the height of a handrail of a cot relative to a bed body, characterised in that, include: A fixed seat is provided for connection with the bed body. The fixed seat is provided with a sliding groove, which includes a wide part and a narrow part. One end of the wide part in a first direction is connected to the narrow part. The dimension of the wide part in a second direction is W1, and the dimension of the narrow part in the second direction is W2, where W1 > W2. Any two of the second direction, the first direction, and the extension direction of the sliding groove are perpendicular to each other. A sliding seat includes a guide rail portion, a connecting portion, and a transition portion. The two ends of the transition portion in the first direction are respectively connected to the guide rail portion and the connecting portion. The guide rail portion is slidably disposed in the wide portion, and the transition portion is slidably disposed in the narrow portion. The connecting portion is disposed outside the slide groove and is used to connect with a handrail. The sliding seat can slide along the slide groove to rise and fall relative to the fixed seat. The surface of the guide rail portion near the transition portion is a first limiting surface, and the wall surface of the wide portion near the narrow portion is a second limiting surface. The first limiting surface and the second limiting surface abut against each other to prevent the guide rail portion from disengaging from the slide groove. The guide rail includes a first arc and a second arc. The top surface of the guide rail is connected to the top of the first limiting surface through the first arc, and the bottom surface of the guide rail is connected to the side surface of the guide rail opposite to the transition part through the second arc. The arc of the first arc is θ1, and the arc of the second arc is θ2, where θ1 > θ2.

2. The armrest height adjustment mechanism of claim 1, wherein The dimension of the guide rail in the first direction is L1, where L1≥8mm, θ1≥1.4 rad, and θ2≤0.9 rad.

3. The armrest height adjustment mechanism of claim 1, wherein, The guide rail includes a first side and a second side, and the first side and the second side are respectively disposed at both ends of the guide rail in the second direction; The guide rail also includes a third arc and two fourth arcs. The top end of the first side and the top end of the second side are connected by the third arc. The bottom end of the first side is connected to the second arc by one of the fourth arcs. The bottom end of the second side is connected to the second arc by the other fourth arc. The radius of the third arc is greater than the radius of the fourth arc.

4. The armrest height adjustment mechanism of claim 1, wherein, The outer surface of the fixing seat includes a facing surface, which is disposed opposite to the second limiting surface. The minimum distance between the facing surface and the second limiting surface in the first direction is L2, where L2 ≥ L1 / 3.

5. The armrest height adjustment mechanism of claim 1, wherein The guide rail includes: The main body is connected to the transition portion, and the first limiting surface is disposed on the main body; Longitudinal ribs are connected to the surface of the main body on the side opposite to the transition portion; A transverse rib is connected to the side surface of the main body opposite to the transition portion. The transverse rib is perpendicular to the extension direction of the groove. The transverse rib and the longitudinal rib intersect each other. The transverse rib, the longitudinal rib and the main body together define a plurality of weight-reducing grooves.

6. The armrest height adjustment mechanism of claim 5, wherein, The dimension of the main body in the first direction is L3, where L3 ≥ L1 / 3.

7. The armrest height adjustment mechanism of claim 5, wherein, The longitudinal rib has a dimension of W3 in the second direction, where W3 ≥ 2.5 mm.

8. The armrest height adjustment mechanism of claim 5, wherein, The weight-reducing grooves are provided in a total of n, where n is an even number greater than zero. The longitudinal ribs are provided with n / 2 weight-reducing grooves on each side in the second direction. The guide rail part has a dimension of H1 in the extension direction of the slide groove, and the dimension of a single weight-reducing groove in the extension direction of the slide groove is H2, where (n / 2)·H2≤0.7H1.

9. The armrest height adjustment mechanism of claim 5, wherein, The transverse rib has a dimension of H3 in the extension direction of the groove, where H3 ≥ 2.5 mm.

10. The armrest height adjustment mechanism of claim 1 or 8, wherein, The dimension of the guide rail in the extension direction of the slide groove is H1, where 4≤H1 / L1≤8.

11. The armrest height adjustment mechanism of claim 1, wherein, The first limiting surface includes a first region and a second region. The first region and the second region are distributed along the second direction and are respectively disposed on different sides of the transition portion. The first region has a size of W6 in the second direction, the second region has a size of W4 in the second direction, and the transition portion has a size of W5 in the second direction. W6 = W4, W5 ≤ W4 ≤ 2W5.

12. A cot, characterised in that, include: The armrest height adjustment mechanism as described in any one of claims 1 to 11; The handrail is fixedly connected to the sliding seat; The bed frame is fixedly connected to the fixed seat, and the armrests and the bed frame together define a space for accommodating an infant; A support assembly, which is fixedly connected to the bed frame to support the bed frame. The support assembly includes a first support assembly fixedly connected to a first end of the bed body and a second support assembly fixedly connected to a second end of the bed body. The first support assembly and the second support assembly can extend and retract independently of each other to adjust the angle of the bed body relative to the horizontal direction.

13. The crib of claim 12, wherein, The bed frame has two ends along the first direction, namely the first end and the second end. Two armrests are provided, each installed at one end of the bed frame along the second direction. The first support assembly includes a first fixed frame and a first movable frame that are slidably connected to each other, and the first movable frame is connected to the first end; The second support assembly includes a second fixed frame and a second movable frame that are slidably connected to each other, and the second movable frame is connected to the second end; The first movable frame is movable relative to the first fixed frame, and the second movable frame is movable relative to the second fixed frame, so that the crib can switch between a first state and a second state; when the crib is in the first state, the first end and the second end are at the same height; when the crib is in the second state, the first end is higher than the second end or the second end is higher than the first end.

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