Adjustable fixed chair

Abstract

The utility model relates to medical auxiliary instrument field, concretely relates to an adjustable fixed chair. Including chair unit and fixed unit, chair unit includes backrest, and fixed unit sets up on backrest, and fixed unit includes headrest assembly and two side edge limiting assembly, and headrest assembly includes headrest, first sliding seat and first sliding block, two side edge limiting assembly symmetrical settings in the both sides of headrest, and two side edge limiting assembly all include limiting plate, push rod, guide rod, carousel, base, second sliding seat and second sliding block, and push rod and guide rod all transversely pass through carousel, at least three sliding slots are equipped on backrest along the vertical direction, and all sliding slots distribute along the width direction of backrest in proper order, and first sliding block and two second sliding blocks respectively pass through three sliding slots, and three positioning pieces are detachably connected on backrest and are used for positioning first sliding seat and two second sliding seats respectively. The adjustable fixed chair in the utility model solves the problem that the patient with big height span cannot be used between the patients.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary devices, specifically to an adjustable fixed chair. Background Technology

[0002] When patients undergo certain treatments and examinations, they need to maintain an upright posture for extended periods, and their heads cannot be moved arbitrarily during the process. For example, in the treatment of a certain disease, patients may need to remain seated with their heads up for at least 20-30 minutes. During this time, to avoid stimulating the patient's eyes with the instrument, the patient also needs to close their eyes. In practice, patients are very likely to fall asleep, at which point their heads may uncontrollably tilt to the side or veil, causing the right frontal lobe to be out of alignment with the instrument, thus interrupting the treatment.

[0003] Currently, although there exists a chair for fixing a patient's head and face, as disclosed in application number CN202120715901.4, it consists of a chair body, a base frame, and a head and face fixing component. The chair body includes a seat and a backrest. The head and face fixing component, in the direction away from the backrest, includes a fixing base, a vertical telescopic rod, a horizontal telescopic rod, and a fixing plate connected in sequence. The fixing plate has an arc-shaped cross-section to fix the human head. The fixing plate is flexible or elastic.

[0004] The chair described above supports the patient's head using a head and face fixation component. However, this component is located at the top of the backrest. In practical application, because the patients range from teenagers to adults, with a wide age range and significant differences in height, body shape, and head circumference, the head and face fixation component can only be adjusted within a limited range. This results in shorter patients having their heads too low to reach the component at the top of the backrest when seated. Furthermore, although the fixation plate is curved, patients with smaller head circumferences still have room for their heads to turn left and right and tilt when using the head and face fixation component, thus reducing the effectiveness of head fixation. Utility Model Content

[0005] The present invention aims to provide an adjustable fixed chair to solve the problem of incompatibility between patients with large height differences.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an adjustable fixed chair, comprising a chair unit and a fixing unit. The chair unit includes a backrest, and the fixing unit is disposed on the backrest. The fixing unit includes a headrest assembly and two side limiting assemblies. The headrest assembly includes a headrest, a first slide block, and a first slider. The two ends of the first slider are fixed to the headrest and the first slide block, respectively. The two side limiting assemblies are symmetrically disposed on both sides of the headrest. Each side limiting assembly includes a limiting plate, a push rod, a guide rod, a turntable, a base, a second slide block, and a second slider. The two ends of the second slider are fixed to the second slide block and the base, respectively. The turntable rotates with the base. The push rod and the guide rod both pass through the turntable laterally. One end of the push rod is threaded with the turntable, and the other end abuts against the limiting plate. One end of the guide rod is fixed to the limiting plate and slides with the turntable. The backrest has at least three vertical grooves, all of which are distributed sequentially along the width of the backrest. The first slider and two second sliders pass through the three grooves and slide in cooperation with the backrest. Three positioning components are detachably connected to the backrest, which are used to position the first slide block and the two second slide blocks respectively.

[0007] The beneficial effects of this plan are: 1. The backrest of this design features a vertically extending groove along its upper edge. This groove allows the headrest assembly and side limiting components to slide downwards, increasing their downward adjustment range. Therefore, this design makes the chair suitable for both shorter teenagers and taller adults, offering greater versatility. Simultaneously, two side limiting components are located on either side of the headrest. When the headrest restricts the patient's head movement, these two limiting plates restrict movement from both sides of the head, preventing the head from shifting to the left or right or turning, thus improving the head-restraining effect.

[0008] 2. The headrest in this design can slide downwards, allowing it to be adjusted to align with the back of the patient's neck. This ensures the patient's head is slightly tilted back when leaning against the backrest, better exposing the right frontal lobe and aligning it directly with the treatment device for optimal therapeutic effect. Furthermore, patients of different heights, body types, and head circumferences will have slightly different head tilt angles when maintaining this posture. The limiting plate in this design is located on a turntable. By rotating the turntable, the limiting plate can be adjusted to match the patient's head tilt angle, increasing the contact area between the limiting plate and the patient's head and improving the head-limiting effect.

[0009] Furthermore, the backrest has an inner cavity, and the slide is a through groove that runs through the side wall of the backrest near the headrest. The first slide and two second slides are located in the inner cavity.

[0010] The beneficial effects of this solution are as follows: taking the headrest assembly as an example, the headrest and the first slide are located on both sides of the slide groove, and the side wall of the inner cavity automatically limits the headrest, thereby preventing the headrest from moving towards the side closer to the patient, thus providing better support for the patient's neck.

[0011] Furthermore, both the first and second slides have positioning posts fixed on the side opposite to the headrest, and multiple positioning grooves are provided vertically inside the cavity. The positioning posts correspond one-to-one with the positioning grooves and can slide along the positioning grooves.

[0012] The beneficial effects of this solution are: when adjusting the height of the headrest and the limiting plate vertically, the cooperation between the positioning post and the positioning groove can further prevent the headrest and the limiting plate from tilting, thus enabling more stable sliding.

[0013] Furthermore, an L-shaped fixing plate is provided on the rear outer wall of the backrest away from the headrest. The fixing plate has multiple fixing holes along its vertical edge. A strip groove is provided on the backrest opposite to the fixing plate. The fixing holes are opposite to the strip groove, and the positioning element passes through the fixing holes and the strip groove and is detachably connected to the first slide or the second slide.

[0014] The beneficial effects of this solution are as follows: On the one hand, the fixing plate can limit the installation of the positioning components; on the other hand, the fixing plate can increase the strength of the backrest after it is attached to the backrest, thereby preventing the backrest from deforming when a heavier patient leans against it.

[0015] Secondly, the fixation plate in this solution can be removed from the backrest. At this time, the fixation plate is placed on the hospital bed, and the headrest assembly is removed. After inserting the positioning post on the first slide into the fixing hole, the headrest assembly can be positioned by the fixation plate. This allows the headrest to be placed under the back of the patient's neck when the patient is lying flat on the hospital bed, so that the patient can maintain a slightly tilted head posture even when lying down. This keeps the patient's airway open during electroconvulsive therapy and prevents the patient from suffocating.

[0016] During their actual work, the inventors discovered that there are relatively few patients in clinical practice who require electroconvulsive therapy (ECT). Only patients undergoing ECT need their heads immobilized in a lying position on a hospital bed. Therefore, this type of immobilization structure is used only once every few days. Thus, compared to setting up a separate immobilization device for use on a hospital bed, the headrest assembly and immobilization plate combination in this solution form an immobilization structure that can be used on a hospital bed, improving equipment utilization while avoiding the need for a separate immobilization device for lying positions, which would occupy ward space when the immobilization device is not used for a long time.

[0017] Furthermore, the chair unit also includes a seat, the backrest is fixed to the seat, a support plate is provided below the seat, a gap is provided between the support plate and the seat, the lower part of the fixing plate is horizontal and located between the seat and the support plate, and the lower part of the fixing plate is in contact with both the seat and the support plate.

[0018] The beneficial effect of this solution is that the support plate can quickly limit the position of the fixed plate.

[0019] Furthermore, the base is provided with an installation groove with an opening facing away from the headrest. The turntable is located in the installation groove, and an annular pressure plate is provided on the side of the turntable away from the headrest. The pressure plate is attached to the turntable and detachably connected to the base.

[0020] The advantages of this solution are: the turntable can be quickly removed by removing the pressure plate, allowing for better cleaning and replacement of the turntable.

[0021] Furthermore, a spring is provided between the limiting plate and the base, with one end of the spring connected to the limiting plate and used to pull the limiting plate away from the headrest.

[0022] The beneficial effects of this solution are as follows: the spring design allows the limiting plate to move synchronously when the push rod is adjusted to the side away from the headrest, thereby quickly increasing the distance between the limiting plate and the headrest and keeping the limiting plate in the adjusted position, making the adjustment more convenient. Attached Figure Description

[0023] Figure 1 This is a perspective view of Embodiment 1 of the present utility model; Figure 2 This is a partial sectional view of the support plate in Embodiment 1 of this utility model. Figure 3 for Figure 1 Top view; Figure 4 for Figure 1 3D view of the headrest assembly; Figure 5 for Figure 1 3D view of the middle side limiting component; Figure 6 for Figure 1 A three-dimensional view of the central fixing plate; Figure 7 This is a perspective view of Embodiment 2 of the present invention; Figure 8 This is a partial sectional view of the support plate in Embodiment 2 of this utility model. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: seat plate 1, support leg 11, support plate 12, backrest 2, cavity 21, slide groove 22, block 23, headrest 3, groove 31, first slide block 32, first slider 33, threaded hole 34, base 4, push rod 41, second slide block 42, guide rod 43, pressure plate 44, turntable 45, second slider 46, mounting groove 47, limiting plate 5, spring 51, fixing plate 6, fixing hole 61, positioning post 7.

[0025] Example 1 Example 1 is basically as follows Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, an adjustable fixed chair includes a chair unit and a fixing unit. The chair unit includes a backrest 2, a seat 1, and legs 11. The backrest 2 is vertically mounted on the seat 1. The legs 11 are provided in four positions and are located at the four top corners of the seat 1. Specifically, the chair unit in this solution is the same as that in the prior art, and will not be described again in this embodiment.

[0026] The fixing unit is located on the backrest 2. The fixing unit includes a headrest assembly and two side limiting assemblies. The headrest assembly includes a headrest 3, a first slide block 32, and a first slider 33. The front sidewall of the headrest 3 has a groove 31 extending along its length to limit the back of the patient's neck. At the same time, the groove 31 has an arc shape with its lower part protruding forward along its vertical sidewall to allow the patient's head to tilt slightly backward. The two ends of the first slider 33 are welded to the first slide block 32 and the headrest 3, respectively. The rear sidewall of the first slide block 32 is welded with a positioning post 7.

[0027] Two side limiting components are located on both sides of the headrest 3 and are symmetrically arranged along the headrest 3. Each side limiting component includes a limiting plate 5, a push rod 41, a guide rod 43, a turntable 45, a base 4, a second slide block 42, and a second slider 46. The two ends of the second slider 46 are respectively welded to the second slide block 42 and the base 4. A positioning post 7 is also welded to the rear side wall of the second slide block 42. The backrest 2 has an upward-opening cavity 21. The front side wall of the cavity 21 has three sliding grooves 22 along the width direction. The sliding grooves 22 extend vertically and are all through grooves that penetrate the front side wall of the cavity 21. The first slide block 32 and the second slide block 42 are both located in the cavity 21. The first slider 33 and the second slider 46 are located in the sliding grooves 22 and can slide along the sliding grooves 22. Multiple sets of strip blocks are welded on the rear side wall of cavity 21. Each set of strip blocks includes two blocks 23. The two blocks 23 are arranged vertically and form a vertical positioning groove. The positioning groove corresponds one-to-one with the positioning post 7, and the positioning post 7 can slide along the positioning groove.

[0028] Three L-shaped fixing plates 6 are provided on the rear side wall of the backrest 2. The vertical part of the fixing plate 6 abuts against the rear side wall of the backrest 2, and the horizontal part abuts against the bottom of the seat 1. A support plate 12 is provided horizontally below the seat 1. The two ends of the support plate 12 are welded to two support legs 11 respectively. The top of the support plate 12 abuts against the bottom of the horizontal part of the fixing plate 6, thus supporting and limiting the fixing plate 6.

[0029] The rear wall of cavity 21 is provided with a strip groove opposite to the slide groove 22. The strip groove extends vertically. The rear walls of the first slide 32 and the second slide 42 are both provided with threaded holes 34, which correspond one-to-one with the strip groove. The vertical part of the fixing plate 6 is provided with several fixing holes 61, which are distributed vertically on each fixing plate 6. Three positioning members are provided. In this embodiment, the positioning members are long screws. The three positioning members are respectively opposite to the three threaded holes 34, and the positioning members pass through the aligned fixing holes 61 and the strip groove and are threaded into the threaded holes 34 to position the first slide 32 and the second slide 42.

[0030] Taking the side limiting component on the right side of the headrest 3 as an example, the base 4 is provided with an installation groove 47 with an opening facing away from the headrest 3. The turntable 45 is located in the installation groove 47. The right side of the turntable 45 is provided with an annular pressure plate 44. The pressure plate 44 presses on the turntable 45 and is detachably connected to the base 4 by screws. The inner diameter of the pressure plate 44 is smaller than the outer diameter of the turntable 45, and the outer diameter of the pressure plate 44 is larger than the outer diameter of the turntable 45, so that the pressure plate 44 can limit the turntable 45 and prevent the turntable 45 from coming off. At the same time, the pressure of the pressure plate 44 on the turntable 45 is maintained such that when the turntable 45 is manually rotated, the turntable 45 can rotate relative to the base 4. In the natural state, the turntable 45 can maintain the angle after rotation.

[0031] The limiting plate 5 is located between the base 4 and the headrest 3. Both the guide rod 43 and the push rod 41 pass through the middle of the pressure plate 44 and through the turntable 45. Specifically, the push rod 41 is threaded into the middle of the turntable 45 and abuts against the limiting plate 5. The guide rod 43 has a small clearance fit with the turntable 45, allowing it to slide axially relative to the turntable 45. The end of the guide rod 43 is welded to the limiting plate 5. A spring 51 is sleeved between the base 4 and the limiting plate 5. Both ends of the spring 51 are connected to the turntable 45 and the limiting plate 5 respectively, so that when the push rod 41 is adjusted away from the headrest 3, the limiting plate 5 can slide away from the headrest 3 under the action of the spring 51.

[0032] The specific implementation process is as follows: In this embodiment, left, right, front, and back refer to the patient's left, right, front, and back directions when the patient is sitting on the seat 1.

[0033] Initially, the patient sits on the seat board 1 with their back against the backrest 2. The height of the headrest 3 and the limiting plate 5 is adjusted according to the height of the patient's neck so that the headrest 3 is aligned with the back of the patient's neck. During adjustment, the positioning component is first removed, and then the first slide block 32 and the second slide block 42 are slid vertically to the preset position. After sliding, the positioning component is inserted through the fixing hole 61 and the strip groove and screwed into the threaded hole 34. The first slide block 32 and the second slide block 42 are then repositioned.

[0034] With the patient's neck resting against the headrest 3 in a slightly tilted-back position, the two limiting plates 5 are positioned on either side of the patient. Rotating the limiting plates 5 so they face the sides of the patient's head, the rotation angle of the limiting plates 5 is similar to the tilt angle of the patient's head. Then, by rotating the push rod 41, the limiting plates 5 are brought closer to the patient's head, thus limiting the patient's head from both sides to prevent it from turning to the sides or tilting to one side. In this way, even if the patient remains in the same position for an extended period while asleep, the headrest 3 and the two limiting plates 5 can support the patient's head without causing large-angle displacement, thereby maintaining a good therapeutic effect.

[0035] Example 2 Based on Example 1, such as Figure 7 and Figure 8 As shown, the difference between this embodiment and Embodiment 1 is that the upper end of the backrest 2 in this embodiment is tilted backward, so that when the patient sits on the seat board 1, their back can tilt slightly backward and lean against the backrest 2, resulting in greater comfort. At the same time, the fixing plate 6 in this embodiment is tilted simultaneously. At this time, the bottom of the fixing plate 6 is in a tilted state, and the support plate 12 is in contact with the bottom of the fixing plate 6 and also maintains a tilted state. This allows the fixing plate 6 to still be limited by the support plate 12 when the bottom of the fixing plate 6 slides between the support plate 12 and the seat board 1.

[0036] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An adjustable fixed chair, comprising a chair unit and a fixing unit, the chair unit including a backrest, the fixing unit being disposed on the backrest, characterized in that: The fixing unit includes a headrest assembly and two side limiting assemblies. The headrest assembly includes a headrest, a first slide block, and a first slider. The two ends of the first slider are fixed to the headrest and the first slide block, respectively. The two side limiting assemblies are symmetrically arranged on both sides of the headrest. Each side limiting assembly includes a limiting plate, a push rod, a guide rod, a turntable, a base, a second slide block, and a second slider. The two ends of the second slider are fixed to the second slide block and the base, respectively. The turntable rotates with the base. The push rod and the guide rod both pass through the turntable laterally. One end of the push rod is threaded with the turntable, and the other end abuts against the limiting plate. One end of the guide rod is fixed to the limiting plate and slides with the turntable. The backrest has at least three vertical grooves, all of which are distributed sequentially along the width of the backrest. The first slider and two second sliders pass through the three grooves and slide in cooperation with the backrest. Three positioning components are detachably connected to the backrest, which are used to position the first slide block and the two second slide blocks respectively.

2. The adjustable fixed chair according to claim 1, characterized in that: The backrest has an inner cavity, and the slide is a through groove that passes through the side wall of the backrest near the headrest. The first slide and two second slides are located in the inner cavity.

3. An adjustable fixed chair according to claim 2, characterized in that: The first and second slides are each fixed with a positioning post on the side away from the headrest. Multiple positioning grooves are provided vertically inside the cavity. The positioning post corresponds to the positioning groove and can slide along the positioning groove.

4. An adjustable fixed chair according to claim 3, characterized in that: The backrest has an L-shaped fixing plate on the outer rear wall away from the headrest. The fixing plate has multiple fixing holes along its vertical edge. The backrest has a strip groove opposite to the fixing plate. The fixing holes are opposite to the strip groove, and the positioning element passes through the fixing holes and the strip groove and is detachably connected to the first slide or the second slide.

5. An adjustable fixed chair according to claim 4, characterized in that: The chair unit also includes a seat, the backrest is fixed to the seat, a support plate is provided below the seat, there is a gap between the support plate and the seat, the lower part of the fixing plate is horizontal and located between the seat and the support plate, and the lower part of the fixing plate is in contact with both the seat and the support plate.

6. An adjustable fixed chair according to claim 1, characterized in that: The base has an opening opposite the headrest in the mounting groove. The turntable is located in the mounting groove. An annular pressure plate is provided on the side of the turntable away from the headrest. The pressure plate is attached to the turntable and is detachably connected to the base.

7. An adjustable fixed chair according to claim 1, characterized in that: A spring is provided between the limiting plate and the base. One end of the spring is connected to the limiting plate and is used to pull the limiting plate away from the headrest.

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