CN107616642B

CN107616642B - Bedside bed and armrest adjusting mechanism thereof

Info

Publication number: CN107616642B
Application number: CN201610556400.XA
Authority: CN
Inventors: 方淦清
Original assignee: BP Childrens Products HK Co Ltd
Current assignee: BP Childrens Products HK Co Ltd
Priority date: 2016-07-13
Filing date: 2016-07-13
Publication date: 2020-09-01
Anticipated expiration: 2036-07-13
Also published as: CN107616642A

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 armrest adjusting mechanism thereof

Technical Field

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

Background

The bedside bed (such as a baby bed) provides great convenience for nursing infants, and particularly, in order to solve the problem that a caregiver needs to get up frequently to take care of the infants at night to affect sleeping, the caregiver can purchase the bedside bed with the height equivalent to that of an adult bed, and when the caregiver sleeps at night, the infant bed can be placed beside the adult bed to be convenient to take care of.

As shown in fig. 1-2, a conventional support-type bedside bed 1 'includes a base 101', a stand 102 ', a support frame 103', and an upper rail 104 ', and an activity space is enclosed by the support frame 103' and the upper rail 104 ', and the upper side of the upper rail 104' is open, so that an infant can be placed in the activity space through an opening above the upper rail 104 'for the infant to lie down, or the infant can be taken out through the opening above the upper rail 104'. In order to facilitate the caregiver to enter the activity space by passing his/her arm through the upper rail 104 ', a rotatable armrest 105 ' is provided on the stand 102 ', and the height of the infant passing through the upper rail 104 ' when entering or taking out the infant is reduced by rotating the armrest 105 '.

However, when the above-mentioned bedside bed 1 ' is used at night, if the adult mattress 3 and the bedside bed 1 ' are completely close to each other, the armrest 105 ' of the bedside bed 1 ' interferes with the adult mattress 3, and the armrest 105 ' cannot be lowered, as shown in fig. 1; if the armrest 105 'is fully lowered, a gap is formed between the adult mattress 3 and the bedside bed 1', as shown in fig. 2, thereby causing inconvenience in use.

Therefore, there is a need to provide an armrest adjustment mechanism and a bedside bed that can not only ensure that no gap is left between the armrest and the adult bed when in use, but also ensure that the armrest does not interfere with the adult bed when rotating downwards, so as to solve the above-mentioned deficiencies of the prior art.

Disclosure of Invention

The invention aims to provide an armrest adjusting mechanism suitable for a bedside bed, which can ensure that an armrest does not interfere with an adult mattress when the armrest rotates downwards under the condition that a gap is not left between the bedside bed and the adult bed.

Another object of the present invention is to provide a bedside bed which ensures that no gap is left between the bedside and an adult bed when in use, and that the armrests do not interfere with the adult mattress when rotated downward.

In order to achieve the purpose, the technical scheme of the invention is as follows: the armrest adjusting mechanism comprises a clamping part and an operating part, wherein the clamping part is arranged between the armrest of the bedside bed and the fixed frame and has a locking state and a releasing state; the operation part is arranged on the bedside and used for driving the clamping part to be converted between a locking state and a releasing state; when the clamping part is in the unlocking state, the armrest can translate and rotate relative to the fixed frame.

Preferably, the engaging portion includes a fixing base, a sliding base and a positioning assembly; the fixed seat is fixed on the fixed frame; the sliding seat is fixed on the handrail and connected with the fixed seat, and can slide and rotate relative to the fixed seat; the positioning assembly is arranged between the sliding seat and the fixed seat to position the sliding seat and the fixed seat; the positioning component is connected with the operation part, and the operation part drives the positioning component to act so as to unlock the clamping part.

Preferably, the positioning assembly comprises a clamping piece and a driving piece; the clamping piece is connected with the sliding seat in a sliding way and is provided with a locking position clamped with the fixed seat and a releasing position separated from the fixed seat; the driving part is arranged between the sliding seat and the fixed seat and used for driving the clamping part to convert between a locking position and a 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 member is connected to the operating portion, and the driving member is driven to rotate by the operating portion.

Preferably, the driving member is provided with a long slot, and one end of the engaging member passes through the long slot to engage with the fixing base.

Preferably, the driving inclined plane is protruded at two sides of the elongated slot, a flange matched with the driving inclined plane is protruded on the clamping piece, and the driving inclined plane pushes the flange to enable the clamping piece to slide.

Preferably, the positioning assembly further includes a first elastic member and a second elastic member, the first elastic member is disposed between the engaging member and the sliding seat for making the engaging member always have a tendency of sliding toward the locking position, and the second elastic member is connected between the driving member and the sliding seat for driving the driving member to reset.

Preferably, the fixed seat is provided with a first guide groove, the sliding seat is fixed with a first positioning member, and the first positioning member is arranged in the first guide groove in a penetrating manner.

Preferably, the fixed seat is provided with a notch communicated with the first guide groove, and when the sliding seat rotates relative to the fixed seat, the first positioning piece is separated from the first guide groove through the notch.

Preferably, the fixed seat is fixed with a second positioning member, the sliding seat is provided with a second guide slot, and the second positioning member is inserted into the second guide slot.

Preferably, the operating part is arranged on the handrail of the bedside bed and comprises a pin piece and a traction piece; the pin piece is connected with the handrail in a sliding way and can slide between a first position and a second position; the traction piece is connected between the pin piece and the clamping part, and the pin piece slides to pull the clamping part to release the lock by the traction piece.

Preferably, the handrail is provided with a sliding groove extending along the axial direction of the handrail, and the pin member is arranged in the sliding groove in a penetrating manner.

Preferably, the operating portion further includes an operating handle rotatably disposed on the armrest, the operating handle is provided with a driving groove, an end of the pin is engaged with the driving groove, and the operating handle rotates to drive the pin to slide from the first position to the second position through the driving groove.

Preferably, the operating handle is rotated in a radial direction of the armrest, and the pin member slides in an axial direction of the armrest.

Correspondingly, the utility model also provides a bedside bed, including fixed frame and connect in fixed frame's handrail, it still includes as above handrail guiding mechanism, makes the handrail can be for fixed frame translation and rotation by handrail guiding mechanism.

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

Compared with the prior art, the handrail adjusting mechanism comprises a clamping part and an operating part connected with the clamping 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 releasing state; the operation part is arranged on the bedside and used for driving the clamping part to be converted between a locking state and a releasing state; when the clamping part is in the unlocking state, the handrail can be pushed to move horizontally to be close to the fixed frame, and then the handrail is pushed to rotate downwards relative to the fixed frame, so that the bedside bed in use can be 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. Correspondingly, the bedside bed with the armrest adjusting mechanism has the same technical effect.

Drawings

Fig. 1 is a schematic view of a conventional bedside table in use.

Fig. 2 is another state diagram of fig. 1.

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

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

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

Fig. 6 is a schematic view 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 a release state.

Fig. 8 is a schematic view of the armrest of fig. 3 after being translated 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 showing a state in which the armrest of fig. 3 is rotated with respect 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, wherein like element numerals represent like elements. The armrest adjustment mechanism 2 of the present invention is suitable for a bedside bed 1, wherein the bedside bed 1 may be a baby bed, a playpen, etc., but not limited thereto, and may also be other baby carriers, which are well known to those skilled in the art. The following describes the structure of the bedside table 1 and the armrest adjusting mechanism 2 according to the present invention, with reference to the drawings.

Referring first to fig. 3, the bedside bed 1 of the present invention comprises a base 101, a column 102, a support frame 103, a fixed frame 104 and an armrest 105. The upright post 102 is connected to the base 101, the supporting frame 103 and the fixing frame 104 are sequentially fixed on the upright post 102, the fixing frame 104 is fixed at the top end of the upright post 102, the fixing frame 104 is horizontally arranged, the handrail 105 is correspondingly connected with the fixing frame 104, the handrail 105 and the fixing frame 104 jointly form an upper fence of the bedside bed 1, the handrail 105 can horizontally slide relative to the fixing frame 104 and can rotate up and down relative to the fixing frame 104, and the angle adjustment of the handrail 105 is realized.

Specifically, the fixed frame 104 is substantially U-shaped, and two ends of the fixed frame are respectively provided with a telescopic tube 106, and the two telescopic tubes 106 correspond to two ends of the armrest 105. When the bedside bed 1 is in a use state, the telescopic tube 106 protrudes out of the fixed frame 104 and abuts against the end of the handrail 105, so as to fill up a gap between the handrail 105 and the fixed frame 104; when the armrest 105 is pushed to slide horizontally, the armrest 105 pushes the telescopic tube 106 to press the armrest 105 into the fixed frame 104, so that the armrest 105 rotates downward relative to the fixed frame 104, thereby preventing the armrest 105 from interfering with an adult mattress when rotating downward, and when the armrest 105 rotates upward to a horizontal position, the telescopic tube 106 returns to deform and pushes the armrest 105 to reset.

With continued reference to fig. 3, the bedside bed 1 is further provided with an armrest adjustment mechanism 2, and the armrest 105 can slide horizontally and rotate relative to the fixed frame 104 by the armrest adjustment mechanism 2. Specifically, the armrest adjustment mechanism 2 includes an operation portion 10 and an engagement portion 20; wherein, the engaging portion 20 is disposed between the armrest 105 and the fixed frame 104, and has a locking state and a releasing state; the operation part 10 is arranged on the armrest 105 and connected with the clamping part 20, and the clamping part 20 can be driven to be converted between a locking state and a releasing state through the operation part 10; when the engaging portion 20 is in the unlocking state, the armrest 105 is pushed to slide horizontally relative to the fixed frame 104, and then the armrest 105 is pushed to rotate downward.

In this embodiment, the engaging portions 20 are respectively disposed between the two ends of the handle 105 and the fixed frame 104, only one operation portion 10 is disposed on the handle 105, and the two engaging portions 20 are driven by the operation portion 10 to release or lock. However, the operation portion 10 is not limited to this, and the operation portion 10 may be disposed on other structures of the bedside bed 1, such as the fixed frame 104, the upright post 102 or the base 101, and also achieve the function of driving the locking of the engaging portion 20.

Referring now to fig. 4, the operating portion 10 includes an operating handle 11, a pin member 12, and a pulling member 13. The operating handle 11 is rotatably disposed outside the armrest 105, the pin 12 is slidably connected to the armrest 105 and is slidable between a first position and a second position, and the pulling member 13 is connected between the pin 12 and the engaging portion 20. When the pin 12 is at the first position, the engaging portion 20 is in a locked state, and after the operating handle 11 is rotated, the pin 12 can be driven to slide from the first position to the second position, so that the engaging portion 20 is pulled by the pulling member 13 to release the lock.

Specifically, the handrail 105 is provided with a sliding groove 1051 extending along the axial direction thereof, and the pin 12 is inserted into the sliding groove 1051 and protrudes out of the handrail 105. The operation lever 11 is provided with a driving groove 111, the driving groove 111 intersects with the slide groove 1051, and the end of the pin 12 engages with the driving groove 111. When the pin member 12 is located at the end of the slide groove 1051 when in the first position, the drive groove 111 will drive the pin member 12 to slide inwardly along the slide groove 1051 when the lever 11 is rotated in the radial direction of the armrest 105, and to be in the second position when the pin member 12 slides to the middle of the slide groove 1051.

In this embodiment, the operating handle 11 includes an upper cover 11a and a lower cover 11b that are disposed outside the armrest 105, and the upper cover 11a and the lower cover 11b are both provided with driving grooves 111. Further, since the two engaging portions 20 are simultaneously driven by the operation handle 11 to release the lock, two pins 12 are provided in the sliding groove 1051, and correspondingly, two driving grooves 111 are provided in the operation handle 11, and the two driving grooves 111 are substantially in a splayed shape.

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

Referring to fig. 3 and 5 to 7, the two engaging portions 20 of the present invention have the same structure, and only one engaging portion 20 will be described as an example.

Referring first to fig. 5-6, the engaging portion 20 includes a fixed base 21, a sliding base 22 and a positioning assembly 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 disposed between the sliding seat 22 and the fixing seat 21 for positioning the sliding seat 22 and the fixing seat 21, and the positioning assembly 23 is connected to the pulling member 13, so that when the operation handle 11 is operated, the positioning assembly 23 can be pulled by the pulling member 13 to operate, so as to unlock the engaging portion 20.

In this embodiment, the sliding seat 22 includes a sliding front seat 22a and a sliding rear seat 22b that are fixed in a matching manner, the two are fixed on the armrest 105 in a matching manner, and a clamping space (not numbered) is formed between the two, the fixing seat 21 is clamped in the clamping space, so that the sliding seat 22 can slide along the fixing seat 21; the positioning component 23 is arranged in the clamping space to position the two.

With continued reference 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. The engaging member 232 is slidably connected to the sliding seat 22 and has a locking position engaging with the fixing seat 21 and a releasing position disengaging from the fixing seat 21; the driving member 231 is disposed between the sliding seat 22 and the fixing seat 21, and is used for driving the locking member 232 to switch between the locking position and the unlocking position; the first elastic member 233 is disposed between the engaging member 232 and the sliding seat 22 for driving the engaging member 232 to slide from the unlocking position to the locking 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 22a (see fig. 5) and 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 formed by protruding radially outward, the first elastic member 233 is sleeved outside the engaging member 232, and two ends of the first elastic member 233 respectively abut against the flange 2321 and the sliding front seat 22a, when the engaging member 232 slides from the locking position to the unlocking position, the first elastic member 233 is compressed, so that when the first elastic member 233 is deformed again, the first elastic member 233 can push the engaging member 232 to slide from the unlocking position to the locking position, and the engaging member 232 always tends to engage with the fixing seat 21.

Preferably, the engaging member 232 is a pin, and the first elastic member 233 is a spring, but neither of them is limited thereto.

Referring to fig. 6-7, one end of the driving member 231 is pivotally connected to the sliding seat 22 and connected to the pulling member 13, and the other end is provided with a driving inclined surface 2311 and an arc-shaped long groove 2312, the driving inclined surface 2311 is protruded on two sides of the long groove 2312, the end with the driving inclined surface 2311 is fixedly connected to one end of the second elastic member 234, and the other end of the second elastic member 234 is fixed to the sliding seat 22.

One end of the engaging member 232 passes through the long groove 2312 to be detachably engaged with the fixing seat 21, and the flange 2321 on the engaging member 232 is engaged with the driving inclined surface 2311. When the driving member 231 is pulled by the pulling member 13, the driving member 231 rotates around the pivot point between the driving member 231 and the sliding seat 22, and the driving inclined surface 2311 pushes the flange 2321 of the engaging member 232 to slide toward the unlocking position. In the process, the second elastic member 234 is stretched and deformed, and when it recovers the deformation, the driving member 231 is pulled to reset.

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

Referring to fig. 7, the positioning assembly 23 further includes a connecting member 235, one end of the connecting member 235 is fixedly connected to the pulling member 13, and the other end of the connecting member 235 is pivotally connected to the sliding seat 22 and the driving member 231, and when the connecting member 235 is pulled by the pulling member 13, the driving member 231 is driven to rotate around the pivotal axis therebetween.

As shown in fig. 5-7, a guiding structure is further disposed between the sliding seat 22 and the fixed seat 21. Specifically, the fixed seat 21 is provided with a first guide groove 211; correspondingly, the sliding seat 22 is fixed with a first positioning member 221, and the first positioning member 221 is inserted into the first guide groove 211. The first guide groove 211 and the first positioning member 221 cooperate to guide and limit the sliding of the sliding seat 22.

Referring to fig. 5, the sliding seat 22 further defines a second guiding groove 222, and the second guiding groove 222 and the first guiding groove 211 are located on the same plane and partially communicate with each other. The fixing base 21 is fixed with a second positioning element 212, and the second positioning element 212 is inserted into the second guiding slot 222, so that the second positioning element 212 and the first positioning element 221 are located on the same straight line.

Referring to fig. 5-7 again, in the embodiment, when the sliding seat 22 rotates relative to the fixed seat 21, the second positioning element 212 is the rotating shaft thereof, so that the fixed seat 21 is provided with a notch 213 communicating with the first guiding groove 211, the notch 213 penetrates through the bottom of the fixed seat 21, and the notch 213 is formed on an arc which takes the axis of the second positioning element 212 as the center of circle and the axis of the second positioning element 212 as the radius from the end of the first guiding groove 211, so that when the sliding seat 22 rotates relative to the fixed seat 21, the first positioning element 221 can be separated from the first guiding groove 211 through the notch 213.

The adjustment of the armrest 105 of the bedside bed 1 according to the invention will now be described with reference to fig. 3-10.

Referring first to fig. 3, in use, the bedside bed 1 has a support frame 103 that fits completely around the edge of the adult bed without any gap therebetween. If the position of the armrest 105 needs to be adjusted at this time, the operating handle 11 is rotated, the driving groove 111 on the operating handle 11 drives the pin 12 to slide inwards along the sliding groove 1051, and as shown in fig. 4, the pin 12 pulls the engaging part 20 through the pulling piece 13 to release the lock.

Referring to fig. 6-7, the pulling element 13 pulls the connecting element 235 to rotate, the connecting element 235 drives the driving element 231 to rotate around the pivot axis therebetween, the driving inclined surface 2311 on the driving element 231 pushes the flange 2321 on the engaging element 232 during the rotation of the driving element 231, so that the engaging element 232 slides in the direction perpendicular to the fixing seat 21 to disengage from the fixing seat 21, as shown in fig. 7, during the process, the first elastic element 233 is compressed, and the second elastic element 234 is stretched.

Referring to fig. 8-9, after the engaging member 232 is disengaged from the fixing seat 21, the armrest 105 is pushed to translate towards the fixing frame 104 until the first positioning member 221 of the sliding seat 22 abuts against the end of the first guiding slot 211 of the fixing seat 21. During the sliding of the handrail 105, the end thereof pushes the telescopic tube 106 and presses the telescopic tube 106 into the fixed frame 104, thereby reducing the distance between the handrail 105 and the fixed frame 104.

Then, the armrest 105 is pushed to rotate towards the lower part of the bedside bed 1, when the armrest 105 rotates, the sliding seat 22 rotates downwards relative to the fixed seat 21 around the second positioning element 212, and during the rotation process, the first positioning element 221 is separated from the first guide groove 211 through the notch 213; when the rotation of the armrest 105 is completed, the first positioning member 221 rotates to the bottom of the fixing seat 21 and abuts against the bottom of the fixing seat 21, and the telescopic tube 106 automatically pops out of the fixing frame 104 to return to the initial position, as shown in fig. 10-11. Because the armrest 105 is pushed inwards to be close to the fixed frame 104 before rotating, and then rotates downwards, on the premise of ensuring that the bedside bed 1 is completely close to the edge of the adult bed, the armrest 105 cannot interfere with the adult mattress when rotating downwards, and the operation is more convenient.

When the armrest 105 needs to be rotated upward again, the armrest 105 is pulled to rotate upward, the telescopic tube 106 is pushed again in the upward rotation process of the armrest 105, when the armrest 105 is rotated to the state shown in fig. 8-9, the armrest 105 presses the telescopic tube 106 into the fixed frame 104 again, after the operation on the operation portion 10 is cancelled, the telescopic tube 106 is reset to push the armrest 105 to translate outward, so that the armrest 105 moves to the state shown in fig. 5-6, in the process, the second elastic member 234 recovers deformation and pulls the driving member 231 to rotate to the initial position, and simultaneously, the first elastic member 233 recovers deformation and pushes the engaging member 232 to engage with the fixed seat 21 again.

In summary, in the bedside bed 1 of the present invention, the armrest adjustment mechanism 2 includes the engaging portion 20 and the operating portion 10, the engaging portion 20 is disposed between the armrest 105 and the fixed frame 104 of the bedside bed 1, and has a locked state and a released state; the operation part 10 is arranged on the bedside bed 1 and connected with the clamping part 20, and the operation part 10 is used for driving the clamping part 20 to convert between a locking state and a releasing state; when the engaging portion 20 is in the unlocking state, the armrest 105 is pushed to move horizontally to approach the fixed frame 104, and then the armrest 105 is pushed to rotate downward relative to the fixed frame 104, so that the bedside bed 1 in use can be ensured to be completely close to the edge of the adult bed, and the armrest 105 rotating downward is not interfered by the adult mattress, and the use is more convenient.

Other constructions of the bedside bed 1 according to the invention are known to the person skilled in the art and will not be described in detail here.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims

1. An armrest adjustment mechanism for a bedside bed for adjusting the position of an armrest of the bed relative to a fixed frame, comprising:

the clamping part is arranged between the handrail and the fixed frame of the bedside bed and has a locking state and a releasing state;

the operation part is arranged on the bedside and used for driving the clamping part to be converted between the locking state and the unlocking state;

the clamping part comprises a fixed seat and a sliding seat, the fixed seat is fixed on the fixed frame, and the sliding seat is fixed on the handrail and connected with the fixed seat;

when the clamping part is in the unlocking state, the sliding seat can slide and rotate relative to the fixed seat so as to enable the armrest to translate and rotate relative to the fixed frame.

2. The armrest adjustment mechanism of claim 1 wherein the engagement portion further comprises:

the positioning assembly is arranged between the sliding seat and the fixed seat so as to position the sliding seat and the fixed seat;

and the positioning component is connected with the operation part, and the positioning component is driven to act through the operation part so as to unlock the clamping part.

3. The armrest adjustment mechanism of claim 2 wherein the positioning assembly comprises:

the clamping piece is connected with the sliding seat in a sliding way and is provided with a locking position clamped with the fixed seat and a releasing position separated from the fixed seat;

and the driving part is arranged between the sliding seat and the fixed seat and used for driving the clamping part to convert between the locking position and the unlocking position.

4. The armrest adjustment mechanism of claim 3 wherein the direction of sliding movement of the catch is perpendicular to the direction of sliding movement of the slide block.

5. The armrest adjustment mechanism of claim 3 wherein the drive member has a drive ramp surface corresponding to the engagement member, wherein the drive ramp surface pushes the engagement member to slide toward the unlocked position when the drive member is rotated.

6. The armrest adjustment mechanism of claim 5 wherein the drive member is coupled to the operating portion, the drive member being driven for rotation by the operating portion.

7. The armrest adjustment mechanism of claim 5 wherein the driving member defines an elongated slot, and one end of the engaging member extends through the elongated slot to engage with the fixed seat.

8. The armrest adjustment mechanism of claim 7 wherein the driving ramps are disposed on opposite sides of the elongated slot, the engaging member has a protruding flange that engages with the driving ramps, and the driving ramps push against the protruding flange to slide the engaging member.

9. The armrest adjustment mechanism of claim 3 wherein the positioning assembly further comprises a first resilient member disposed between the engaging member and the slide block for maintaining the engaging member in a tendency to slide toward the locked position, and a second resilient member coupled between the driving member and the slide block for urging the driving member to return.

10. The armrest adjustment mechanism according to claim 2, wherein the fixed seat has a first guide slot, the sliding seat has a first positioning element fixed thereon, and the first positioning element is inserted into the first guide slot.

11. The armrest adjustment mechanism of claim 10, wherein the fixed seat defines a notch communicating with the first guide slot, and when the sliding seat rotates relative to the fixed seat, the first positioning member is disengaged from the first guide slot through the notch.

12. The armrest adjustment mechanism according to claim 2, wherein a second positioning element is fixed on the fixed seat, a second guide slot is formed on the sliding seat, and the second positioning element is inserted into the second guide slot.

13. The armrest adjustment mechanism according to claim 1, wherein the operation portion is provided to an armrest of the bedside bed, and the operation portion includes:

the pin piece is connected with the handrail in a sliding mode and can slide between a first position and a second position;

the traction piece is connected between the pin piece and the clamping part, and the pin piece slides to pull the clamping part to release the lock by the traction piece.

14. The armrest adjustment mechanism according to claim 13, wherein the armrest has a sliding groove extending in an axial direction of the armrest, and the pin member is inserted into the sliding groove.

15. The armrest adjustment mechanism of claim 13 wherein the operating portion further comprises an operating lever rotatably disposed on the armrest, the operating lever defining a drive slot, an end of the pin engaging the drive slot, the operating lever being rotatable to drive the pin to slide from the first position to the second position via the drive slot.

16. The armrest adjustment mechanism according to claim 15, wherein the operating lever is rotated in a radial direction of the armrest, and the pin member slides in an axial direction of the armrest.

17. A bedside bed comprising a fixed frame and an armrest connected to the fixed frame, further comprising an armrest adjustment mechanism as claimed in any of claims 1-16, whereby the armrest is translatable and rotatable relative to the fixed frame.

18. The bedside bed of claim 17, further comprising a telescoping tube telescopically disposed within said fixed frame, said telescoping tube being configured to reposition said armrest.