CN107616642A - Bedside bed and armrest adjusting mechanism thereof - Google Patents

Abstract

The invention discloses a handrail adjusting mechanism which is suitable for a bedside bed to adjust the position of a handrail of the bedside bed relative to a fixed frame and comprises a clamping part and an operating part, wherein the clamping part is arranged between the handrail of the bedside bed and the fixed frame and has a locking state and a unlocking state; when the clamping part is in the unlocking state, the handrail can translate relative to the fixed frame and then pushes the handrail to rotate downwards relative to the fixed frame, so that the bedside bed in use is ensured to be completely close to the edge of the adult bed, the handrail cannot be interfered by the adult mattress when rotating downwards, and the use is more convenient. The invention also discloses a bedside bed with the armrest adjusting mechanism.

Description

Bedside bed and its armrest adjustment mechanism

technical field

The invention relates to the technical field of infant products, in particular to a bedside bed and an armrest adjustment mechanism for the bedside bed.

Background technique

Bedside beds (such as cribs) provide great convenience for the care of infants and young children, especially in order to solve the problem that caregivers need to get up frequently to take care of infants and young children at night and affect sleep. Bed, when you sleep at night, you can easily take care of it by placing the baby bed next to the adult bed.

As shown in Figure 1-2, an existing bracket type bedside bed 1` includes a base 101`, a stand 102`, a support frame 103` and an upper fence 104`, through the support frame 103` and the upper fence 104` An activity space is formed, and the top of the upper fence 104' is open, so that infants and young children can be put into the activity space through the opening above the upper fence 104', so that the infants can lie down on their backs, or the baby can be placed from the top of the upper fence 104'. Hold the baby out of the opening. And in order to facilitate the caregiver's arm to enter the activity space through the upper fence 104 ′, therefore, a rotatable handrail 105 ′ is set on the stand 102 ′. The height of the upper fence 104`.

However, when the above-mentioned bedside bed 1` is used at night, if the adult mattress 3 is completely close to the bedside bed 1`, the armrest 105` of the bedside bed 1` will interfere with the adult mattress 3, causing the armrest 105` to fail. Lay down, as shown in Figure 1; If ensure that handrail 105 ' can be laid down completely, then there will be gap between adult mattress 3 and bedside bed 1 ', as shown in Figure 2, thereby cause inconvenience to use.

Therefore, it is necessary to provide an armrest adjustment mechanism and a bedside bed that can not only ensure that there is no gap between the adult bed and the adult bed, but also ensure that the armrest will not interfere with the adult mattress when the armrest is rotated downwards. The above-mentioned deficiencies in the prior art.

Contents of the invention

The purpose of the present invention is to provide an armrest adjustment mechanism suitable for bedside beds, which can ensure that when there is no gap between the bedside bed and the adult bed, the armrest will not interfere with the adult mattress when it rotates downward .

Another object of the present invention is to provide a bedside bed, which can ensure that there is no gap between it and the adult bed when in use, and the armrest will not interfere with the adult mattress when the armrest is rotated downward.

In order to achieve the above object, the technical solution of the present invention is to provide an armrest adjustment mechanism, which is suitable for bedside beds to adjust the position of the armrest relative to the fixed frame. The armrest adjustment mechanism includes an engaging part and an operating part, and the engaging part It is arranged between the armrest of the bedside bed and the fixed frame, and has a locked state and an unlocked state; the operating part is arranged on the bedside bed, and is used to drive the engaging part to switch between the locked state and the unlocked state; when When the engaging portion is in the unlocked state, the armrest can translate and rotate relative to the fixed frame.

Preferably, the engaging part includes a fixed seat, a sliding seat and a positioning assembly; the fixed seat is fixed on the fixed frame; the sliding seat is fixed on the armrest and connected with the fixed seat, and the sliding seat can slide and rotate relative to the fixed seat; the positioning assembly is provided The positioning assembly is positioned between the sliding seat and the fixed seat; and the positioning component is connected with the operating part, and the positioning component is driven by the operating part to release the lock of the engaging part.

Preferably, the positioning assembly includes an engaging part and a driving part; the engaging part is slidably connected to the sliding seat, and has a locking position engaged with the fixing seat and an unlocking position disengaged from the fixing seat; the driving part is provided with Between the sliding seat and the fixed seat, it is used to drive the engaging part to switch between the locking position and the unlocking position.

Preferably, the sliding direction of the engaging member is perpendicular to the sliding direction of the sliding seat.

Preferably, the driving member is provided with a driving inclined surface corresponding to the engaging member, and when the driving member rotates, the driving inclined surface pushes the engaging member to slide toward the unlocking position.

Preferably, the driving part is connected with the operating part, and the driving part is driven to rotate by the operating part.

Preferably, a long slot is opened on the driving part, and one end of the engaging part passes through the long slot to engage with the fixing seat.

Preferably, the driving slope is protrudingly provided on both sides of the long groove, and a flange matching the driving slope protrudes from the engaging member, and the driving slope pushes the flange to make the engaging member slide.

Preferably, the positioning assembly further includes a first elastic member and a second elastic member, the first elastic member is arranged between the engaging member and the sliding seat, and is used to make the engaging member always have a tendency to slide toward the locked position, and the second elastic member The elastic part is connected between the driving part and the sliding seat, and is used for driving the driving part to reset.

Preferably, a first guide groove is opened on the fixed seat, a first positioning member is fixed on the sliding seat, and the first positioning member is passed through the first guide groove.

Preferably, a notch communicating with the first guide groove is opened on the fixed seat, and when the sliding seat rotates relative to the fixed seat, the first positioning member breaks away from the first guide groove through the notch.

Preferably, a second positioning member is fixed on the fixing seat, a second guiding groove is opened on the sliding seat, and the second positioning member is passed through the second guiding groove.

Preferably, the operating part is arranged on the armrest of the bedside bed, and the operating part includes a pin and a traction part; the pin is slidably connected to the armrest and can slide between the first position and the second position; the traction part is connected to the pin Between the locking part and the engaging part, the pin slides and the engaging part is pulled by the traction part to release the lock.

Preferably, the armrest is provided with a sliding groove extending along its axial direction, and the pin is passed through the sliding groove.

Preferably, the operating part also includes a rotating operating handle provided on the armrest. A driving slot is provided on the operating handle. The position slides toward the second position.

Preferably, the operating handle rotates along the radial direction of the armrest, and the pin slides along the axial direction of the armrest.

Correspondingly, the utility model also provides a bedside bed, which includes a fixed frame and an armrest connected to the fixed frame, and also includes the above-mentioned armrest adjustment mechanism, through which the armrest can translate relative to the fixed frame and rotate.

Preferably, the bedside bed further includes a telescopic tube telescopically arranged on the fixed frame, and the telescopic tube can push the armrest to reset.

Compared with the prior art, because the armrest adjustment mechanism of the present invention includes a locking part and an operating part connected thereto, the locking part is arranged between the armrest of the bedside bed and the fixed frame, and has a locked state and a locking state. Unlocked state; the operating part is set on the bedside bed, which is used to drive the engaging part to switch between the locked state and the unlocked state; when the engaging part is in the unlocked state, the armrest can be pushed to move close to the fixed frame, and then the armrest can be pushed Rotating downwards relative to the fixed frame can ensure that the bedside bed in use is completely close to the edge of the adult bed, and the armrest will not be interfered by the adult mattress when the armrest is rotated downward, which is more convenient to use. Correspondingly, the bedside bed with the armrest adjustment mechanism also has the same technical effect.

Description of drawings

Fig. 1 is a schematic diagram of a use state of an existing bedside bed.

FIG. 2 is a schematic diagram of another state of FIG. 1 .

Fig. 3 is a schematic structural view of the bedside bed of the present invention.

Fig. 4 is an exploded view of the operation part in Fig. 3 .

FIG. 5 is an enlarged schematic view of the engaging portion in FIG. 3 .

FIG. 6 is a schematic diagram of the internal structure of the engaging portion in FIG. 5 .

FIG. 7 is a schematic structural view of the engaging portion in FIG. 6 in an unlocked state.

Fig. 8 is a schematic diagram of the state of the armrest in Fig. 3 after translation relative to the fixed frame.

FIG. 9 is an enlarged schematic view of the engaging portion in FIG. 8 .

Fig. 10 is a schematic view of the state of the armrest in Fig. 3 after it is rotated relative to the fixed frame.

FIG. 11 is an enlarged schematic view of the engaging portion in FIG. 10 .

detailed description

Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements. The armrest adjustment mechanism 2 provided by the present invention is suitable for the bedside bed 1, wherein the bedside bed 1 can be a crib, a game bed, etc., but is not limited thereto, and can also be other baby carriers. techniques known to those skilled in the art. The structure of the bedside bed 1 and its armrest adjustment mechanism 2 of the present invention will be described below in conjunction with the accompanying drawings.

Referring first to FIG. 3 , the bedside bed 1 provided by the present invention includes a base 101 , a column 102 , a support frame 103 , a fixed frame 104 and an armrest 105 . The column 102 is connected on the base 101, the support frame 103 and the fixed frame 104 are fixed on the column 102 in turn, and the fixed frame 104 is fixed on the top of the column 102, the fixed frame 104 is horizontally arranged, and the handrail 105 is correspondingly connected with the fixed frame 104. These together form the upper fence of the bedside bed 1, and the armrest 105 can slide horizontally relative to the fixed frame 104, and can rotate up and down relative to the fixed frame 104 to realize the angle adjustment of the armrest 105.

Specifically, the fixed frame 104 is roughly U-shaped, and telescopic tubes 106 are respectively provided at both ends thereof, and the two telescopic tubes 106 correspond to the two ends of the handrail 105 . When the bedside bed 1 is in use, the telescopic tube 106 protrudes from the fixed frame 104 and touches the end of the armrest 105 to fill the gap between the armrest 105 and the fixed frame 104; when the armrest 105 is pushed to slide horizontally, the armrest 105 tops Push the telescopic tube 106 and press it into the fixed frame 104, so that the armrest 105 rotates downwards relative to the fixed frame 104, so as to prevent the armrest 105 from interfering with the adult mattress when the armrest 105 rotates downward, and when the armrest 105 rotates upward to the level position, the telescopic tube 106 recovers and deforms to push the armrest 105 to reset.

Continuing to refer to FIG. 3 , the bedside bed 1 is also provided with an armrest adjustment mechanism 2 , and the armrest 105 can slide horizontally and rotate relative to the fixed frame 104 through the armrest adjustment mechanism 2 . Specifically, the armrest adjustment mechanism 2 includes an operating portion 10 and an engaging portion 20; wherein, the engaging portion 20 is disposed between the armrest 105 and the fixed frame 104, and has a locked state and an unlocked state; the operating portion 10 is disposed on On the armrest 105 and connected with the engaging part 20, the operating part 10 can drive the engaging part 20 to switch between the locked state and the unlocked state; when the engaging part 20 is in the unlocked state, the armrest 105 can be pushed first After sliding horizontally relative to the fixed frame 104, push the armrest 105 to rotate downward.

In this embodiment, engaging parts 20 are provided between the two ends of the armrest 105 and the fixed frame 104, and only one operating part 10 is provided on the armrest 105, and the operating part 10 synchronously drives the two engaging parts 20 to release or lock. . However, the setting of the operating part 10 is not limited thereto. The operating part 10 can also be set on other structures of the bedside bed 1, such as the fixed frame 104, the column 102 or the base 101, and can also reach the drive engagement part 20. The function of unlocking.

Referring to FIG. 4 below, the operating part 10 includes an operating handle 11 , a pin 12 and a pulling member 13 . Wherein, the operating handle 11 is rotatably disposed outside the armrest 105 , the pin 12 is slidably connected to the armrest 105 and can slide between the first position and the second position, and the traction member 13 is connected between the pin 12 and the engaging portion 20 . When the pin 12 is at the first position, the engaging part 20 is in a locked state. After the operating handle 11 is turned, the pin 12 can be driven to slide from the first position to the second position, thereby pulling the engaging part 20 through the traction member 13 release the lock.

Specifically, the armrest 105 is provided with a sliding slot 1051 extending axially, and the pin 12 passes through the sliding slot 1051 and protrudes out of the armrest 105 . The operating handle 11 defines a driving slot 111 , the driving slot 111 and the sliding slot 1051 intersect, and the end of the pin 12 is engaged in the driving slot 111 . When the pin 12 is in the first position, it is located at the end of the sliding groove 1051. When the operating handle 11 is rotated radially along the armrest 105, the driving groove 111 will drive the pin 12 to slide inwardly along the sliding groove 1051. When the pin When the component 12 slides to the middle of the sliding groove 1051, it is in the second position.

In this embodiment, the operating handle 11 includes an upper cover 11a and a lower cover 11b that are matched with each other on the outside of the armrest 105 , and both the upper cover 11a and the lower cover 11b are provided with driving grooves 111 . Moreover, since the two locking parts 20 are simultaneously driven to be released by the operating handle 11, two pins 12 are arranged in the sliding groove 1051, and correspondingly, two driving grooves 111 are opened on the operating handle 11, and the two driving grooves 111 are approximately It is in the shape of a figure of eight.

Preferably, the pulling member 13 in the present invention is a steel wire, but not limited thereto, and can be replaced by other similar flexible members.

As shown below in conjunction with FIGS. 3 , 5-7 , in the present invention, the structures of the two engaging parts 20 are the same, and now only one of the engaging parts 20 is taken as an example to illustrate its structure.

Referring first to FIGS. 5-6 , the engaging portion 20 includes a fixing seat 21 , a sliding seat 22 and a positioning component 23 . The fixed seat 21 is fixed on the fixed frame 104; the sliding seat 22 is fixed on the armrest 105 and connected with the fixed seat 21, and the sliding seat 22 can slide and rotate relative to the fixed seat 21; the positioning assembly 23 is arranged on the sliding seat 22 and the fixed seat 21 To position the two, and the positioning component 23 is connected to the traction member 13, when the operating handle 11 is operated, the positioning component 23 can be pulled by the traction component 13 to release the locking part 20.

In this embodiment, the sliding seat 22 includes a sliding front seat 22a and a sliding rear seat 22b that are matched and fixed. It is clamped in the clamping space, so that the sliding seat 22 can slide along the fixed seat 21; the positioning component 23 is provided in the clamping space to position the two.

Continue referring to FIG. 6 , the positioning assembly 23 includes a driving member 231 , an engaging member 232 , a first elastic member 233 and a second elastic member 234 . Wherein, the engaging part 232 is slidably connected to the sliding seat 22, and has a locking position engaging with the fixing seat 21 and an unlocking position disengaging from the fixing seat 21; the driving member 231 is arranged on the sliding seat 22 and the fixing seat Between 21, it is used to drive the engaging member 232 to switch between the locking position and the unlocking position; the first elastic member 233 is arranged between the engaging member 232 and the sliding seat 22, and is used to drive the engaging member 232 to release the lock. The position slides toward the locked position, and the second elastic member 234 is connected between the driving member 231 and the sliding seat 22 for resetting the driving member 231 .

As shown in FIG. 7 , the engaging member 232 is slidably connected to the sliding front seat 22 a (see FIG. 5 ) and is detachably engaged with the fixed seat 21 , and the sliding direction of the engaging member 232 is perpendicular to the sliding direction of the sliding seat 22 . The engaging member 232 has a flange 2321 protruding outward along its radial direction. The first elastic member 233 is sheathed outside the engaging member 232, and its two ends respectively resist the flange 2321 and the sliding front seat 22a. After sliding from the locked position to the unlocked position, the first elastic member 233 is compressed. Therefore, when the first elastic member 233 returns to deformation, it can push the engaging member 232 to slide from the releasing position to the locked position, and make the engaging member 232 always has a tendency to engage with the fixing seat 21 .

Preferably, the engaging member 232 is a bayonet pin, and the first elastic member 233 is a spring, but both are not limited thereto.

Referring to Figures 6-7, one end of the driving member 231 is pivotally connected to the sliding seat 22 and connected to the traction member 13, and the other end is provided with a driving slope 2311 and an arc-shaped long groove 2312, and drives The slope 2311 protrudes from both sides of the slot 2312 , and the end of the driving slope 2311 is fixedly connected with one end of the second elastic member 234 , and the other end of the second elastic member 234 is fixed on the sliding seat 22 .

One end of the engaging member 232 passes through the long slot 2312 to detachably engage with the fixing seat 21 , and the flange 2321 on the engaging member 232 matches with the driving slope 2311 . When the traction member 13 pulls the driving member 231 , the driving member 231 rotates around the pivot point between it and the sliding seat 22 , and pushes the flange 2321 of the engaging member 232 to slide toward the unlocking position through the driving slope 2311 . During this process, the second elastic member 234 is stretched and deformed, and when it recovers its deformation, the driving member 231 can be pulled to reset.

Preferably, the second elastic member 234 is a tension spring.

7, the positioning assembly 23 also includes a connecting piece 235, one end of the connecting piece 235 is fixedly connected to the traction piece 13, and the other end of the connecting piece 235 is pivotally connected to the sliding seat 22 and the driving piece 231 at the same time. 13. When the connecting member 235 is pulled, it drives the driving member 231 to rotate around the pivot axis between the two.

As shown in FIGS. 5-7 below, a guiding structure is also provided between the sliding seat 22 and the fixed seat 21 . Specifically, a first guiding groove 211 is defined on the fixing seat 21 ; correspondingly, a first positioning member 221 is fixed on the sliding seat 22 , and the first positioning member 221 is passed through the first guiding groove 211 . The first guide groove 211 cooperates with the first positioning member 221 to guide and limit the sliding of the sliding seat 22 .

Referring to FIG. 5 , a second guide groove 222 is defined on the sliding seat 22 , and the second guide groove 222 is located on the same plane as the first guide groove 211 and partly connected. The second positioning member 212 is fixed on the fixing seat 21 , and the second positioning member 212 is passed through the second guide groove 222 , so that the second positioning member 212 and the first positioning member 221 are located on the same straight line.

As shown in Figures 5-7 again, in this embodiment, when the sliding seat 22 rotates relative to the fixed seat 21, the second positioning member 212 is its rotation axis, therefore, the fixed seat 21 is provided with a communicating first guide groove 211 The notch 213, and the notch 213 runs through the bottom of the fixing seat 21, and the notch 213 is formed on the axis of the second positioning member 212 as the center of the circle, the axis of the second positioning member 212 to the end of the first guide groove 211 is In this way, when the sliding seat 22 rotates relative to the fixed seat 21 , the first positioning member 221 can break away from the first guide groove 211 through the notch 213 .

The adjustment process of the armrest 105 of the bedside bed 1 of the present invention will be described below in conjunction with FIGS. 3-10 .

Referring first to Fig. 3, when the bedside bed 1 is in use, its support frame 103 can be completely attached to the edge of the adult bed, so that there is no gap between the two. At this time, if the position of the handrail 105 needs to be adjusted, then the operating handle 11 is rotated, and the driving groove 111 on the operating handle 11 will drive the pin 12 to slide inwardly along the sliding groove 1051, as shown in Figure 4, the pin 12 passes through the traction member 13 Pull the engaging part 20 to release the lock.

Referring specifically to Figures 6-7, the traction member 13 pulls the connecting member 235 to make it rotate, and the connecting member 235 drives the driving member 231 to rotate around the pivot axis between the two. During the rotation of the driving member 231, the driving slope on it 2311 pushes the flange 2321 on the engaging part 232, so that the engaging part 232 slides along the direction perpendicular to the fixing seat 21 and disengages from the engagement with the fixing seat 21. The engaging part 232 in the unlocking position is shown in Fig. 7 As shown, in this process, the first elastic member 233 is compressed, and the second elastic member 234 is stretched.

Referring to Figures 8-9 below, when the engaging member 232 is out of engagement with the fixed seat 21, the armrest 105 is pushed to translate to the fixed frame 104 until the first positioning member 221 on the sliding seat 22 is in contact with the fixed seat 21. The end of the first guide groove 211. During the sliding process of the armrest 105 , its end pushes the telescopic tube 106 and presses the telescopic tube 106 into the fixed frame 104 , thereby reducing the distance between the armrest 105 and the fixed frame 104 .

Then, push the armrest 105 to rotate below the bedside bed 1. When the armrest 105 rotates, the sliding seat 22 rotates downwards around the second positioning member 212 relative to the fixed seat 21. During the rotation, the first positioning member 221 breaks away from the gap 213. The first guide groove 211; when the rotation of the handrail 105 is completed, the first positioning member 221 turns to the bottom of the fixed seat 21 and touches the bottom of the fixed seat 21, and at the same time, the telescopic tube 106 automatically pops out of the fixed frame 104 to restore the initial position, as shown in Figure 10 -11 shown. Because before the armrest 105 rotates, it is first pushed inward and close to the fixed frame 104, and then rotates downwards, therefore, under the premise of ensuring that the bedside bed 1 is completely close to the edge of the adult bed, the armrest 105 will not rotate downwards. It interferes with adult mattresses and is more convenient to operate.

When it is necessary to rotate the armrest 105 upwards again, pull the armrest 105 to rotate upwards, and the telescopic tube 106 will be pushed again during the upward rotation of the armrest 105. When the armrest 105 turns to the state shown in Fig. into the fixed frame 104, when the operation on the operating part 10 is cancelled, the telescopic tube 106 resets and pushes the armrest 105 to move outward in translation, so that the armrest 105 moves to the state shown in Figure 5-6. During this process, the second elastic member 234 Restore the deformation and pull the driving member 231 to rotate to the initial position, and at the same time the first elastic member 233 restores the deformation and pushes the engaging member 232 to engage with the fixing seat 21 again.

In summary, due to the bedside bed 1 of the present invention, its armrest adjustment mechanism 2 includes an engaging part 20 and an operating part 10, and the engaging part 20 is arranged between the armrest 105 and the fixed frame 104 of the bedside bed 1, and It has a locked state and an unlocked state; the operating part 10 is arranged on the bedside bed 1 and connected with the engaging part 20, and the operating part 10 is used to drive the engaging part 20 to switch between the locked state and the unlocked state; When the engaging part 20 is in the unlocked state, the armrest 105 can be pushed to move in translation close to the fixed frame 104, and then the armrest 105 can be pushed to rotate downward relative to the fixed frame 104, so that the in-use bedside bed 1 and the adult bed can be ensured The edges are completely close together, and the armrest 105 rotated downward will not be interfered by the adult mattress, so it is more convenient to use.

Other structures of the bedside bed 1 of the present invention are well known to those skilled in the art and will not be described in detail here.

What is disclosed above is only a preferred embodiment of the present invention, and of course it cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the patent scope of the present invention still fall within the scope of the present invention.

Claims (18)

1. An armrest adjustment mechanism, which is suitable for bedside beds to adjust the position of its armrests relative to the fixed frame, is characterized in that it includes: The engaging part is arranged between the armrest of the bedside bed and the fixed frame, and has a locked state and an unlocked state; An operating part, provided on the bedside bed, is used to drive the engaging part to switch between the locked state and the unlocked state; When the engaging portion is in the unlocked state, the armrest can translate and rotate relative to the fixed frame. 2. The armrest adjustment mechanism according to claim 1, wherein the engaging portion comprises: a fixed seat, fixed on the fixed frame; a sliding seat, fixed on the armrest and connected with the fixed seat, the sliding seat can slide and rotate relative to the fixed seat; A positioning component is arranged between the sliding seat and the fixed seat to position the two; And the positioning component is connected with the operating part, and the positioning component is driven by the operating part to release the locking part. 3. The armrest adjustment mechanism according to claim 2, wherein the positioning assembly comprises: The engaging part is slidably connected to the sliding seat, and has a locking position engaging with the fixing seat and an unlocking position disengaging from the fixing seat; The driving part is arranged between the sliding seat and the fixing seat, and is used for driving the engaging part to switch between the locking position and the unlocking position. 4. The armrest adjustment mechanism according to claim 3, wherein the sliding direction of the engaging member is perpendicular to the sliding direction of the sliding seat. 5. The armrest adjustment mechanism according to claim 3, wherein the driving part is provided with a driving slope corresponding to the engaging part, and when the driving part rotates, the driving slope pushes the The locking part slides to the unlocking position. 6 . The armrest adjustment mechanism according to claim 5 , wherein the driving member is connected to the operating part, and the driving member is driven to rotate by the operating part. 6 . 7 . The armrest adjustment mechanism according to claim 5 , wherein a long slot is opened on the driving part, and one end of the engaging part passes through the long slot to engage with the fixing seat. 8 . 8. The armrest adjustment mechanism according to claim 7, wherein the driving slope is protruded on both sides of the long groove, and the engaging member is protruded with a protrusion matching the driving slope. The driving slope pushes the flange to make the engaging part slide. 9. The armrest adjustment mechanism according to claim 3, wherein the positioning assembly further comprises a first elastic member and a second elastic member, the first elastic member is arranged between the engaging member and the sliding member. Between the seats, it is used to make the engaging member always have a tendency to slide towards the locking position, and the second elastic member is connected between the driving member and the sliding seat, and is used to drive the driving member reset. 10. The armrest adjustment mechanism according to claim 2, wherein a first guide groove is opened on the fixed seat, a first positioning member is fixed on the sliding seat, and the first positioning member passes through the in the first guide groove. 11. The armrest adjustment mechanism according to claim 10, wherein a notch communicating with the first guide groove is opened on the fixed seat, and when the sliding seat rotates relative to the fixed seat, the first A positioning piece escapes from the first guide groove through the gap. 12. The armrest adjustment mechanism according to claim 2, wherein a second positioning member is fixed on the fixed seat, a second guide groove is opened on the sliding seat, and the second positioning member penetrates through the in the second guide groove. 13. The armrest adjustment mechanism according to claim 1, wherein the operating part is arranged on the armrest of the bedside bed, and the operating part comprises: a pin slidably connected to the armrest and slidable between a first position and a second position; The traction part is connected between the pin and the engaging part, and the pin slides to pull the engaging part to release the lock through the traction part. 14 . The armrest adjustment mechanism according to claim 13 , wherein the armrest is provided with a sliding groove extending in the axial direction thereof, and the pin is passed through the sliding groove. 15 . 15. The armrest adjustment mechanism according to claim 13, wherein the operating part further comprises an operating handle which is rotated on the armrest, and a driving groove is opened on the operating handle, and the end of the pin member Engaged in the driving slot, the operating handle rotates to drive the pin to slide from the first position to the second position through the driving slot. 16. The armrest adjustment mechanism according to claim 15, wherein the operating handle rotates along the radial direction of the armrest, and the pin slides along the axial direction of the armrest. 17. A bedside bed, comprising a fixed frame and an armrest connected to the fixed frame, characterized in that it also includes an armrest adjustment mechanism as claimed in any one of claims 1-16, by which the armrest adjustment mechanism The armrest can translate and rotate relative to the fixed frame. 18 . The bedside bed according to claim 17 , further comprising a telescopic tube telescopically arranged on the fixed frame, and the telescopic tube can push the armrest back to reset. 19 .