Anti-pinch device for electric bed

Abstract

The utility model discloses a kind of anti-pinch devices of electric bed, including the induction pressure strip fixed on fixed bed frame or movable bed frame and extend along length direction, respective strip electrode of the top and bottom of induction pressure strip is electrically connected with controller through respective wire, controller is electrically connected with movable bed frame lifting drive device through relay, the controller is the controller that can make lifting drive device stop after receiving the signal that two electrode conduction of induction pressure strip is pressed;The contact part of bed frame opposite to induction pressure strip has the first recess of accommodating induction pressure strip, and / or the second recess of accommodating induction pressure strip bottom plate on the bed frame of fixed induction pressure strip;First recess is gap type recess, and second recess is strip-shaped recess.This anti-pinch device can be mutually attached when the contact surface of movable bed frame reset and fixed bed frame to avoid induction pressure strip abnormal pressure and / or can make the fixed induction pressure strip be straight line on cross bar or vertical rod and fixed relatively firm and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric bed technical field, specifically is a kind of anti-pinch device of electric bed. BACKGROUND

[0002] With the gradual popularization and use of electric bed, people pay high attention to the phenomenon that the hands and feet of people can be pinched by the descending movable bed frame, to avoid the safety accidents of pinching people, especially children, the electric bed of prior art generally has anti-pinch device.

[0003] Commonly used anti-pinch devices include mechanical anti-pinch device, shielding anti-pinch device and anti-pinch device with induction pressure strip and controller to control the start and stop of the lifting driving device of movable bed frame.

[0004] Compared with mechanical anti-pinch device and shielding anti-pinch device, the anti-pinch device with induction pressure strip and controller to control the start and stop of the lifting driving device of movable bed frame has the advantages of simple structure, wide anti-pinch coverage, high sensitivity and good stability.

[0005] The anti-pinch device with induction pressure strip and controller to control the start and stop of the lifting driving device of movable bed frame of prior art includes a hollow rubber body extending along the length direction, the bottom surface is a plane, the top of the hollow rubber body has an electrode extending along the length direction, the bottom has another electrode extending along the length direction, the top electrode is parallel to the bottom electrode, the two parallel electrodes are electrically connected to the controller such as MCU and auxiliary circuit board in the control box through respective wires, and the controller is electrically connected to the lifting driving device of movable bed frame through a relay.

[0006] However, the anti-pinch device with induction pressure strip and controller to control the start and stop of the linear driver such as electric push rod of prior art still has the following disadvantages: 1. The induction pressure strip on the contact surface at the intersection of the vertical rod and horizontal rod of the movable bed frame and the fixed bed frame protrudes from a contact surface in the natural release state, which hinders the fitting of the two contact surfaces when the movable bed frame is reset, and also makes the reliability and stability poor when people lie flat, which causes customers to have a bad experience, and long-term abnormal pressure on the induction pressure strip affects the normal function of the induction pressure strip and shortens its service life. 2. The induction pressure strip is fixed on the top surface of the fixed bed frame or the bottom surface of the movable bed frame by adhesive bonding, which is prone to horizontal displacement during the adhesive bonding process and makes it difficult to make the induction pressure strip completely straight, which affects the actual use effect and the firmness, reliability and aesthetics during long-term use. 3. Since the angle at the turning point of the vertical rod and horizontal rod of the fixed bed frame or the movable bed frame is generally 80°-100°, there is an actual difficulty in the actual laying process of the induction pressure strip: if it is continuously extended and laid, the induction pressure strip at the turning point will be wrinkled and difficult to be normally pressed, which affects its sensitivity, and if it is segmented and each segment is electrically connected to the controller, the external wires will be messy and the cost of wires and fixing glue will be increased. Utility model content

[0007] The utility model solves the technical problem of providing a kind of electric bed's anti-pinch device, the contact surface of movable bed frame can be mutually attached when resetting, and abnormal pressure of sensing pressure strip is avoided and / or fixed sensing pressure strip can be straight on respective rod and fixed relative firm and reliable.

[0008] The technical solution of the utility model is to provide an anti-pinch device of electric bed, including the sensing pressure strip fixed on the fixed bed frame or movable bed frame and extending along the length direction, the respective strip electrode of the top and bottom of sensing pressure strip is electrically connected with controller through respective wire, controller is electrically connected with the lifting driving device of movable bed frame through relay, the controller is the controller that can make lifting driving device stop after receiving the signal that two electrode conduction of sensing pressure strip is pressed;The contact part of bed frame opposite to sensing pressure strip has the first recess that can hold sensing pressure strip, and / or the second recess that can hold the bottom plate of sensing pressure strip on the bed frame of fixed sensing pressure strip.

[0009] After using the above structure, the anti-pinch device of electric bed of the utility model has the following advantages:

[0010] When sensing pressure strip is not pressed, the top electrode and the bottom electrode that are parallel do not contact, when sensing pressure strip is pressed, the top electrode and the bottom electrode contact, and the electric signal is conducted, and the controller judges whether there is object pressing sensing pressure strip by receiving signal, if judging that sensing pressure strip is pressed, controller makes lifting driving device such as the motor of electric push rod of movable bed frame stop at least immediately to prevent pinching hand or foot and other parts;Some are provided with reverse program and can also control motor to reverse, so that driving device such as electric push rod drives movable bed frame to lift and further facilitates the decompression of hand or foot and other pressed parts.

[0011] The anti-pinch device of electric bed of the utility model still has the advantages of simple structure, wide anti-pinch coverage, high sensitivity and good stability.

[0012] Especially, the contact part of bed frame opposite to sensing pressure strip has the first recess that can hold sensing pressure strip, when movable bed frame resets, sensing pressure strip protruding from a contact surface in natural release state is held in the first recess, effectively ensures that the two contact surfaces of movable bed frame and fixed bed frame are well attached when bed frame resets, so that when people lie flat, its reliability and stability are good, customer's excellent experience is greatly increased, and abnormal pressure on sensing pressure strip is eliminated, effectively ensures that sensing pressure strip normally functions, and prolongs the service life of sensing pressure strip.

[0013] Or, the second groove for accommodating the bottom plate of the induction compression strip is arranged on the bed frame for fixing the induction compression strip, so that the top electrode and the bottom electrode in the induction compression strip can be in good contact when the induction compression strip is compressed, the induction compression strip can be completely straight, the actual use effect of the induction compression strip is ensured, and the bottom surface of the bottom plate of the induction compression strip and the bottom surface of the strip-shaped groove are fixed like glue bonding, so that the fixing is more firm, reliable and beautiful.

[0014] Or, the first groove for accommodating the induction compression strip is not arranged on the contact part of the bed frame opposite to the induction compression strip, and only the second groove for accommodating the bottom plate of the induction compression strip is arranged on the bed frame for fixing the induction compression strip. In this way, the top electrode and the bottom electrode in the induction compression strip can be in good contact when the induction compression strip is compressed, the induction compression strip can be completely straight, the actual use effect of the induction compression strip is ensured, and the bottom surface of the bottom plate of the induction compression strip and the bottom surface of the strip-shaped groove are fixed like glue bonding, so that the fixing is more firm, reliable and beautiful.

[0015] It can be understood that if other technicians only arrange the strip-shaped groove for accommodating the bottom plate of the induction compression strip on the bed frame for fixing the induction compression strip, it is still within the protection scope of the utility model. Of course, the utility model preferably has the first groove for accommodating the induction compression strip on the contact part of the bed frame opposite to the induction compression strip. The utility model can also have the first groove for accommodating the induction compression strip on the contact part of the bed frame opposite to the induction compression strip and the second groove for accommodating the bottom plate of the induction compression strip arranged on the bed frame for fixing the induction compression strip. The utility model can also preferably have the first groove and the strip-shaped groove arranged on the surface of part of the rod for fixing the induction compression strip, and the surface of the other part of the rod for fixing the induction compression strip is not provided with the strip-shaped groove.

[0016] Further, the first groove for accommodating the induction compression strip is arranged on the contact part of the vertical rod intersecting with the horizontal rod on which the induction compression strip is fixed, and the first groove for accommodating the induction compression strip is also arranged on the contact part of the horizontal rod intersecting with the vertical rod on which the induction compression strip is fixed, and the first groove is a notch groove. The above structure is more targeted and better adaptable to the fixed bed frame and the movable bed frame in a mesh format, and further guarantees the technical effects generated by the first groove described above.

[0017] Further, the shape and size of the first groove, such as the notch groove, are matched with the shape and size of the part of the induction compression strip protruding from the contact surface. After the above structure is adopted, the contact surface of the vertical rod and the contact surface of the horizontal rod at the intersection can be better fitted when the bed frame is reset, so that the technical effects generated by the good fitting degree described above are further guaranteed, and the groove wall and the protruding part of the flexible induction compression strip are better matched, so that the surface of the protruding part is not scraped, and the matching part is more beautiful.

[0018] Further, the second groove is a strip-shaped groove, which is arranged on the top surface of the longitudinal rod and the horizontal rod of the frame of the fixed bed, the depth of the strip-shaped groove is equal to the height of the induction pressure strip bottom plate, the width of the strip-shaped groove is equal to the width of the induction pressure strip bottom plate, and the length of the strip-shaped groove is equal to the length of each section of the induction pressure strip bottom plate. With the above structure, the technical effects of the strip-shaped groove are further ensured, and the process of fixing the induction pressure strip in the strip-shaped groove is simpler, more convenient and faster.

[0019] Further, the induction pressure strip is arranged in sections on the frame, the horizontal rod is provided with horizontal induction pressure strips, the longitudinal rod is provided with longitudinal induction pressure strips, the two top electrodes of the adjacent horizontal induction pressure strips and longitudinal induction pressure strips at the turning part are electrically connected through a wire, and the two bottom electrodes of the adjacent horizontal induction pressure strips and longitudinal induction pressure strips at the turning part are electrically connected through another wire. With the above structure, even if the included angle of the turning part of the longitudinal rod and the horizontal rod of the frame of the fixed bed or the frame of the movable bed is 80-100°, the actual laying process of the induction pressure strips on the longitudinal rod and the horizontal rod is still simple, convenient and fast. Since there is no continuous induction pressure strip at the turning part, the defect that the induction pressure strip at the turning part is wrinkled and affects the sensitivity is overcome, the induction pressure strips on the longitudinal rod and the horizontal rod are stretched and have sensitive sensing effect, and since the gap at the turning part is small, the electrode connection wire is short and is in series, there is no sensing blind area such as hands and feet, reliable electrical connection is ensured, and the cost of wire and fixing glue is saved compared with external parallel connection.

[0020] Further, the wire is externally provided with a wire protection sleeve opening inward, and the two ends of the wire protection sleeve are fixed on the induction pressure strip. With the above structure, the technical effects of the above section are further ensured, and the wire connection is more stable and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the structure diagram of the anti-pinch device installed on the electric bed Figure 1 .

[0022] Figure 2 is Figure 1 the structure diagram of the anti-pinch device installed on the electric bed

[0023] Figure 3 is Figure 1 the structure diagram of the anti-pinch device installed on the electric bed

[0024] Figure 4 is the structure diagram of the anti-pinch device installed on the electric bed Figure 2 the structure diagram of the anti-pinch device installed on the electric bed

[0025] Figure 5 The bottom of a horizontal rod of the movable bed frame is provided with a groove notch matched with the induction pressing strip Figure 2 The structure schematic view of the groove notch matched with the induction pressing strip.

[0026] Figure 6 The structure schematic view of the anti-pinch device installed on the electric bed Figure 2 .

[0027] Figure 7 The structure schematic view of the anti-pinch device installed on the electric bed Figure 6 The enlarged structure schematic view of B in the figure.

[0028] The figure shows:

[0029] 1, bed frame, 11, fixed bed frame, 111, first horizontal rod, 112, first vertical rod, 113, third horizontal rod, 114, third vertical rod, 115, contact surface, 116, strip-shaped groove, 12, electric push rod, 121, motor, 13, movable bed frame, 131, movable calf board frame, 1311, fourth horizontal rod, 13111, third notch-shaped groove, 1312, fourth vertical rod, 132, movable backboard frame, 1321, second horizontal rod, 13211, first notch-shaped groove, 1322, second vertical rod;

[0030] 2, induction pressing strip, 21, hollow rubber body, 211, bottom plate, 212, middle upper part, 22, top electrode, 23, bottom electrode, 24, wire, 25, wire protection sleeve. DETAILED DESCRIPTION

[0031] The specific embodiments of the utility model will be further described below in combination with the drawings. It is declared here that the description of these specific embodiments is used to help understanding the utility model, but does not constitute the limitation of the utility model. In addition, the technical features involved in each specific embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 indicated.

[0033] The utility model discloses an embodiment of the anti-pinch device of the electric bed, including the induction pressure strip 2 fixed on the bed frame 1 such as fixed bed frame 11 or movable bed frame 13 and along the length direction extension, the respective strip electrode of the top and bottom of induction pressure strip 2 is through the respective wire and the controller electric connection, the controller is through the relay and the lifting drive device electric connection of movable bed frame 13, the controller is the controller that can make the lifting drive device stop after receiving the signal that the two electrodes of induction pressure strip 2 are conducted. The lifting drive device such as electric push rod 12 or electric push rod, stop rotation refers to the motor 121 stop rotation and electric push rod 12 stop contraction, movable bed frame 13 no longer descend. Of course, the controller can also preset the program that the motor 121 stops immediately reverses, make electric push rod 12 drive movable bed frame 13 ascend.

[0034] It is not difficult to understand that induction pressure strip 2 is generally arranged on the upper surface of the fixed bed frame 11 frame, and the induction movable bed frame 13 exerts pressure on the fixed bed frame 11. Of course, the induction pressure strip can also be arranged on the lower surface of the movable bed frame frame, and the induction movable bed frame can exert pressure on the upper surface of the fixed bed frame during the downward pressing process.

[0035] The specific structure of the induction pressure strip 2 can be: a hollow rubber body 21 such as insulating silica gel extends along the length direction, the bottom surface of the hollow rubber body 21 is a plane, the top of the hollow rubber body 21 has an electrode extending along the length direction, i.e., a top electrode 22, and the bottom has another electrode extending along the length direction, i.e., a bottom electrode 23. The top electrode 22 and the bottom electrode 23 are parallel to each other, and the two parallel electrodes are electrically connected to the controller such as MCU and the auxiliary circuit board in the control box through respective wires. The controller can also be referred to as the main controller. The cross-sectional shape of the hollow rubber body 21 can be a hollow semicircle as shown in the figure, a hollow triangle not shown in the figure, and a hollow quadrilateral, etc.

[0036] From the structural form of the electrode, the top can be an electrode wire and the bottom can be a strip-shaped electrode piece; the top can be a strip-shaped electrode piece and the bottom can be an electrode wire; or the top and the bottom can both be strip-shaped electrode pieces. From the material of the electrode, the top and the bottom electrodes can both be metal, such as a circular copper strip, a strip-shaped copper piece, or a circular aluminum strip, a strip-shaped aluminum piece, etc. The end of the wire and the electrode, such as the end of the copper strip or the copper piece, can be welded and fixed. The top and the bottom electrodes can both be conductive silica gel round bars or conductive silica gel strip-shaped plates, etc. The conductive silica gel electrode has the same properties as the metal electrode after being electrified, and the end of the conductive silica gel can be a terminal made of copper foil fixed by hot pressing and welded with the wire. From the fixing form of the electrode and the hollow rubber body 21, i.e., the insulating rubber body such as insulating silica gel, the metal electrode and the insulating rubber body can be fixed by hot pressing or adhesive bonding, etc., and the conductive silica gel or conductive silica gel body and the insulating silica gel body can also be fixed by adhesive bonding or hot pressing, etc.

[0037] The contact part of the bed frame 1 that is pressed against the induction pressing strip 2 has a first groove for accommodating the induction pressing strip 2, and / or the bed frame 1 that fixes the induction pressing strip 2 has a second groove for accommodating the bottom plate 211 of the induction pressing strip 2.

[0038] The meaning of "and / or" has been explained in detail in the above utility model content, and is briefly summarized here: it can be that both the first groove and the second groove are provided; it can be that only the first groove is provided without the second groove; or it can be that only the second groove is provided without the first groove.

[0039] If the second groove is not provided, and the bottom surface of the bottom plate 211 of the induction pressing strip 2 is directly fixed, such as glued, to the contact surface, such as the top surface, of a bed frame 1, such as the fixed bed frame 11, it is also acceptable.

[0040] The contact part of the bed frame 1 that is pressed against the induction pressing strip 2 has a first groove for accommodating the induction pressing strip 2, and / or the bed frame 1 that fixes the induction pressing strip 2 has a second groove for accommodating the bottom plate 211 of the induction pressing strip 2.

[0041] Specifically: the induction pressing strip 2 is fixed on the top surface of the two longitudinal rods, such as the first longitudinal rod 112, of the fixed bed frame 11, then all the contact parts, such as the bottoms, of the horizontal rods, such as the second horizontal rod 1321, of the movable bed frame 13, such as the movable back plate frame 132, that cross the first longitudinal rod 112 have notch-type grooves, such as the first notch-type groove 13211, for accommodating the induction pressing strip 2; at the same time, the induction pressing strip 2 is fixed on the top surface of a horizontal rod, such as the first horizontal rod 111, of the fixed bed frame 11, then all the contact parts, such as the bottoms, of the longitudinal rods, such as the second longitudinal rod 1322, of the movable bed frame 13, such as the movable back plate frame 132, that cross the first horizontal rod 111 have notch-type grooves, such as the second notch-type groove, for accommodating the induction pressing strip 2. Similarly, the induction pressing strip 2 is fixed on the top surface of the two longitudinal rods, such as the third longitudinal rod 114, of the fixed bed frame 11, then all the contact parts, such as the bottoms, of the horizontal rods, such as the fourth horizontal rod 1311, of the movable bed frame 13, such as the movable calf plate frame 131, that cross the third longitudinal rod 114 have notch-type grooves, such as the third notch-type groove 13111, for accommodating the induction pressing strip 2; at the same time, the induction pressing strip 2 is fixed on the top surface of a horizontal rod, such as the third horizontal rod 113, of the fixed bed frame 11, then all the contact parts, such as the bottoms, of the longitudinal rods, such as the fourth longitudinal rod 1312, of the movable bed frame 13, such as the movable calf plate frame 131, that cross the third horizontal rod 113 have notch-type grooves, such as the fourth notch-type groove, for accommodating the induction pressing strip 2.

[0042] The shape and size of the notch-type groove are preferably matched with the shape and size of the part, such as the middle and upper part 212, of the induction pressing strip that protrudes from the contact surface 115. For example,Figure 2 and Figure 3 half-circles, inverted V-shapes and upside-down square shapes. The size of the notch-shaped groove is two kinds, for the case that the bottom plate 211 of the inductive pressing strip 2 is embedded into the strip-shaped groove 116, the height of the notch-shaped groove is equal to or greater than the height of the inductive pressing strip 2 except the bottom plate 211, such as the middle and upper part 212; for the case that the bottom plate 211 of the inductive pressing strip 2 is directly fixed on a contact surface 115, the height of the notch-shaped groove 131 is equal to or greater than the whole height of the inductive pressing strip 2. The width of the notch-shaped groove 131 is also two kinds, for the case that the bottom plate 211 of the inductive pressing strip 2 is embedded into the strip-shaped groove 116, the maximum width of the notch-shaped groove 131 is equal to or greater than the maximum width of the inductive pressing strip 2 except the bottom plate 211, such as the width of the bottom of the middle and upper part 212; for the case that the bottom plate 211 of the inductive pressing strip 2 is directly fixed on a contact surface 115, the width of the notch-shaped groove 131 is equal to or greater than the width of the bottom plate 211 of the inductive pressing strip 2. The notch is also called opening.

[0043] As shown in Figure 1 , Figure 2 and Figure 6 , the strip-shaped groove 116 is preferably opened on the top surface of the longitudinal rods, such as the first longitudinal rod 112 and the third longitudinal rod 114, and the transverse rods, such as the first transverse rod 111 and the third transverse rod 113, of the fixed bed frame 11. Alternatively, the strip-shaped groove can also be opened on the bottom surface of the longitudinal rods and the transverse rods of the movable bed frame. The depth of the strip-shaped groove 116 can be equal to the height of the bottom plate 211 of the inductive pressing strip 2, the width of the strip-shaped groove 116 can be equal to the width of the bottom plate 211 of the inductive pressing strip 2, and the length of the strip-shaped groove 116 can be equal to the length of the bottom plate 211 of the inductive pressing strip 2.

[0044] The inductive pressing strip 2 is preferably segmented on the frame, the transverse inductive pressing strip 2 is arranged on the transverse rods, such as the first transverse rod 111 and the third transverse rod 113, and the longitudinal inductive pressing strip 2 is arranged on the longitudinal rods, such as the first longitudinal rod 112 and the third longitudinal rod 114, the two top electrodes 22 of the adjacent transverse inductive pressing strip 2 and longitudinal inductive pressing strip 2 at the turning position are electrically connected by a wire 24, and the two bottom electrodes 23 of the adjacent transverse inductive pressing strip 2 and longitudinal inductive pressing strip 2 at the turning position are electrically connected by another wire 24.

[0045] The wire 24 is preferably provided with a wire protection sleeve 25 which is open inwardly, and the two ends of the wire protection sleeve 25 are fixed on the induction pressing strip 2, such as the two ends of the wire protection sleeve 25 being fixed on the electrode, such as the top electrode 22 and the bottom electrode 23, or the end of the hollow rubber body 21 of the induction pressing strip 2, and the fixing can be adhesive. The wire protection sleeve 25 can be made of insulating silica gel.

[0046] The parts, structures or quantities not shown in the drawings are not marked, and some parts are not marked. The drawings are only schematic, and if there is any inconsistency between the drawings and the written description, or between the drawings and each other, the written description shall prevail.

[0047] The above description is only the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An anti-pinch device for an electric bed, comprising a sensing pressure bar fixed to a fixed bed frame or a movable bed frame and extending along its length, wherein the top and bottom strip electrodes of the sensing pressure bar are electrically connected to a controller via their respective wires, and the controller is electrically connected to a lifting drive device of the movable bed frame via a relay, wherein the controller is a controller that can stop the lifting drive device after receiving a signal that the two electrodes are connected due to pressure on the sensing pressure bar; characterized in that: The contact part of the bed frame opposite to the induction pressing strip has a first recess for accommodating the induction pressing strip, and / or the bed frame has a second recess for accommodating the bottom plate of the induction pressing strip.

2. The anti-pinch device of an electric bed according to claim 1, characterized in that: The contact part of the longitudinal rod intersecting with the horizontal rod fixed with the induction pressing strip has a first recess for accommodating the induction pressing strip, and the contact part of the horizontal rod intersecting with the longitudinal rod fixed with the induction pressing strip also has a first recess for accommodating the induction pressing strip, and the first recess is a notch type recess.

3. An anti-entrapment device for an electric bed according to claim 1 or 2, characterized in that: The shape and size of the first recess are matched with the shape and size of the part of the induction pressing strip protruding from the contact surface.

4. The anti-pinch device of an electric bed according to claim 1, characterized in that: The second recess is a strip-shaped recess, which is arranged on the top surface of the longitudinal rod and the horizontal rod of the fixed bed frame, the depth of the strip-shaped recess is equal to the height of the bottom plate of the induction pressing strip, the width of the strip-shaped recess is equal to the width of the bottom plate of the induction pressing strip, and the length of the strip-shaped recess is equal to the length of each section of the bottom plate of the induction pressing strip.

5. The anti-pinch device of an electric bed of claim 1, wherein: The induction pressing strip is arranged in sections on the frame, the horizontal rod is provided with horizontal induction pressing strips, and the longitudinal rod is provided with longitudinal induction pressing strips, the two top electrodes of adjacent horizontal and longitudinal induction pressing strips at the turning part are electrically connected through a wire, and the two bottom electrodes of adjacent horizontal and longitudinal induction pressing strips at the turning part are electrically connected through another wire.

6. The anti-pinch device of an electric bed according to claim 5, characterized in that: The wire is externally provided with a wire protection sleeve with an opening facing inward, and the two ends of the wire protection sleeve are fixed on the induction pressing strip.

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