阅读说明：本技术 用于电动调节医护床的控制盒 (Control box for electric adjusting medical bed ) 是由 郭逢刚 于 2020-05-21 设计创作，主要内容包括：本发明涉及一种用于电动调节医护床的控制盒,包括：上壳部和底壳部,二者组装在一起形成密封空间,以防止水进入控制盒中；印刷电路板组件,设置在底壳部中；电缆插座,连接到印刷电路板组件；其特征在于,底壳部中至少具有由内分隔壁分隔开的第一腔和第二腔,印刷电路板组件设置在第二腔中,第一腔与控制盒外壁相邻；在内分隔壁上设有至少一个第一圆形透气孔以用于使第一腔和第二腔连通,在与第一腔相邻的控制盒壁上设有至少一个第二圆形透气孔以用于使第一腔与控制盒外部连通；第一圆形透气孔和第二圆形透气孔的孔径设计成使得能允许空气透过但阻隔水透过,以便防止水进入第二腔中并使控制盒内外气压平衡。(The invention relates to a control box for an electrically adjustable hospital bed, comprising: an upper housing part and a bottom housing part assembled together to form a sealed space to prevent water from entering the control box; a printed circuit board assembly disposed in the bottom case portion; a cable socket connected to the printed circuit board assembly; the printed circuit board assembly is arranged in the second cavity, and the first cavity is adjacent to the outer wall of the control box; the inner partition wall is provided with at least one first circular air hole for communicating the first cavity with the second cavity, and the wall of the control box adjacent to the first cavity is provided with at least one second circular air hole for communicating the first cavity with the outside of the control box; the first and second circular vents have an aperture designed to allow air to pass through but block water from passing through to prevent water from entering the second chamber and to equalize the air pressure inside and outside the control box.)

1. A control box for electrically adjusting a hospital bed, comprising:

an upper housing part and a bottom housing part assembled together to form a sealed space to prevent water from entering the control box;

a printed circuit board assembly disposed in the bottom case portion;

a cable socket connected to the printed circuit board assembly;

it is characterized in that the preparation method is characterized in that,

the bottom shell part at least comprises a first cavity and a second cavity which are separated by an inner partition wall, the printed circuit board assembly is arranged in the second cavity, and the first cavity is adjacent to the outer wall of the control box;

the inner partition wall is provided with at least one first circular air hole for communicating the first cavity with the second cavity, and the wall of the control box adjacent to the first cavity is provided with at least one second circular air hole for communicating the first cavity with the outside of the control box;

the first and second circular vents have an aperture designed to allow air to pass through but block water from passing through to prevent water from entering the second chamber and to equalize the air pressure inside and outside the control box.

2. The console box for an electric adjustment hospital bed according to claim 1, characterized in that the upper and lower housing parts are made of plastic.

3. The control box for a motorized adjustment medical care bed of claim 1, wherein the bottom housing portion is generally rectangular having first and second exterior end walls opposite each other and first and second exterior side walls opposite each other, the first cavity being adjacent the first exterior end wall, the second circular vent being disposed on the first exterior end wall.

4. The control box for an electrically adjustable hospital bed according to claim 1, characterized in that the cable plug can be inserted into the power socket through an opening provided on the outer wall of the control box.

5. The control box for the electric adjustment medical bed as claimed in claim 1, wherein a passage communicating with the outside of the control box is provided in the first chamber, the passage having a passage wall, and a second circular ventilation hole is provided on the passage wall for communicating the first chamber with the passage, thereby communicating the first chamber with the outside.

6. The control box for a motorized adjustment medical care bed of claim 1, wherein the bottom housing portion is generally rectangular having first and second exterior end walls opposite each other and first and second exterior side walls opposite each other, the first cavity being adjacent the second exterior end wall, the second circular vent being disposed in the second exterior end wall.

7. A control box for an electrically adjustable hospital bed according to claim 3, characterized in that a third chamber is provided between the second chamber and the second outer end wall, separated by a further inner partition wall, and that circular air vents are also provided in the second outer end wall and in said further inner partition wall, the aperture being designed to allow the passage of air but to block the passage of water, in order to prevent the entry of water into the second chamber and to equalize the air pressure inside and outside the control box.

Technical Field

The invention relates to a control box, in particular to a control box for electrically adjusting a medical bed.

Background

In the field of medical care, for example hospitals or nursing homes, electrically adjustable hospital beds with adjustable height/angle are often used. In order to adjust the medical care bed, one or more electric push rods are arranged on the medical care bed. The electric push rod is connected with a control box fixed on the medical care bed through a cable, and the cable is connected to a printed circuit board assembly arranged in the control box. The control box can also be connected with the manual control device through a cable.

In hospitals and nursing homes, good hygienic conditions must be ensured to prevent patients from cross-contamination. Therefore, there is a need for regular cleaning of a healthcare bed in a dedicated healthcare cleaning system. When the medical care bed fixed with the control box needs to be cleaned by water spraying, the control box is required to be waterproof.

During water-jet cleaning, the hot water raises the temperature inside the control box. Since the control box is sealed and waterproof, but if it is not breathable, the control box may be subject to the risk of bursting or even explosion under heat.

In order to overcome the risks, holes are formed in the control box, and waterproof breathable films are arranged on the holes in the prior art, so that air permeation is allowed while water permeation is completely prevented, and accordingly, air pressure balance between the inside and the outside of the control box is achieved.

However, the waterproof breathable film is adopted in the scheme, so that the number of parts is increased, and the assembly is complex.

The present invention is directed to solving the above problems.

Disclosure of Invention

The invention provides a control box for an electric adjustment medical bed, which can solve the problems in the prior art.

According to the present invention, there is provided a control box for electrically adjusting a medical bed, comprising: an upper housing part and a bottom housing part assembled together to form a sealed space to prevent water from entering the control box; a printed circuit board assembly disposed in the bottom case portion; a cable socket connected to the printed circuit board assembly; the printed circuit board assembly is arranged in the second cavity, and the first cavity is adjacent to the outer wall of the control box; the inner partition wall is provided with at least one first circular air hole for communicating the first cavity with the second cavity, and the wall of the control box adjacent to the first cavity is provided with at least one second circular air hole for communicating the first cavity with the outside of the control box; the first and second circular vents have an aperture designed to allow air to pass through but block water from passing through to prevent water from entering the second chamber and to equalize the air pressure inside and outside the control box.

According to an embodiment of the present invention, the upper case portion and the bottom case portion are made of plastic.

According to one embodiment of the invention, the bottom shell portion is substantially rectangular and has first and second outer end walls opposite to each other and first and second outer side walls opposite to each other, the first cavity is adjacent to the first outer end wall, and the second circular vent is provided in the first outer end wall.

According to an embodiment of the invention, the cable plug can be plugged into the power socket through an opening provided on an outer wall of the control box.

According to an embodiment of the present invention, a channel communicating with the outside of the control box is provided in the first chamber, the channel having a channel wall, and a second circular vent is provided on the channel wall for communicating the first chamber with the channel, thereby communicating the first chamber with the outside.

According to an embodiment of the invention, the bottom shell is substantially rectangular and has first and second opposite outer end walls and first and second opposite outer side walls, the first cavity being adjacent to the second outer end wall and the second circular vent being provided in the second outer end wall.

According to an embodiment of the invention, a third chamber is provided between the second chamber and the second outer end wall, separated by a further inner partition wall, and circular ventilation apertures are also provided in the second outer end wall and in the further inner partition wall, the apertures being designed to allow air to pass through but to block water from passing through, in order to prevent water from entering the second chamber and to equalize the air pressure inside and outside the control box.

According to the control box for the electric adjustment medical bed, parts can be saved, and assembly is simplified.

Drawings

Objects, features and advantages of the present invention will become apparent to those skilled in the art from the following detailed description of the embodiments with reference to the accompanying drawings. Furthermore, the various elements of the drawings are not necessarily to scale; on the contrary, the dimensions of the various elements in the figures may be exaggerated or minimized as appropriate to more clearly illustrate the embodiments of the present invention.

The invention is further described with reference to the following figures and examples, in which like reference numerals refer to like elements.

Fig. 1 is a top view of a control box for electrically adjusting a hospital bed according to the present invention.

Fig. 2 is a sectional view taken along line B-B of fig. 1.

Fig. 3 is an enlarged view of a portion C in fig. 2.

Fig. 4 is a sectional view taken along line a-a of fig. 1.

Fig. 5 is an enlarged view of a portion D in fig. 4.

Detailed Description

The terms used herein should be understood and interpreted to have a meaning consistent with their understanding by those skilled in the art, rather than a specific definition that is different from the ordinary meaning as understood by those skilled in the art. Specific definitions will be explicitly indicated in the specification.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the sizes, materials, shapes, relative arrangement relationships, and the like of the constituent elements described in the embodiments may be appropriately changed according to the configuration, various conditions, and the like of the apparatus to which the present invention is applied. Therefore, the sizes, materials, shapes, relative arrangement relationships, and the like of the constituent elements described in the embodiments are not intended to limit the scope of the present invention to the following embodiments.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating relative importance or as indicating a number of technical features.

As previously mentioned, the control box of the present invention is secured to an electrically adjustable medical bed, such as to a bed frame of an electrically adjustable medical bed.

As shown in fig. 1, 2 and 4, the control box of the present invention includes an upper casing 1 and a lower casing 2 made of plastic material, which are assembled together by means of screws with a sealing member, gluing, ultrasonic welding, etc., thereby forming a sealed space to prevent water from entering into the control box.

The base part 2 is substantially rectangular with a first 10 and a second 11 outer end wall opposite each other and a first 12 and a second 13 outer side wall opposite each other.

The base part 2 has at least a first chamber (also referred to as a buffer chamber) a and a second chamber (also referred to as a working chamber) B therein, which are separated by an inner partition wall 9. The printed circuit board assembly 3 is disposed in the second cavity B of the base housing part 2.

The first chamber a is adjacent the first outer end wall 10 and the second chamber B is closer to the centre of the control box than the first chamber a. The first outer end wall 10 is provided with an opening 17 for passing through corresponding cables, such as a push rod cable 4 for connection to an electric push rod, a manual control cable 5 for connection to a manual control, a backup cable 6 for connection to a backup power source, such as a battery. The cable is provided with a seal to prevent water from entering the sealed space of the control box. A cable socket is connected to the printed circuit board assembly 3, into which cable socket a cable plug is inserted through said opening 17.

As shown in fig. 4 and 5, in the first chamber a, a passage 14 is provided which is recessed inwardly from the first outer end wall 10. The channel 14 is enclosed by a channel wall 15 and the first outer end wall 10, and the channel 14 communicates with the outside of the control box. At least one second circular vent 8 is provided in the channel wall 15 for communicating the first chamber a with the channel and thus also with the outside. The second circular airing hole 8 has a hole diameter designed to allow air to pass through but to make water difficult to pass through.

Specifically, the pore size of the second circular airing hole 8 is designed such that water forms a water film in the second circular airing hole 8 by the surface tension of the water. If water is left in a very small hole having a certain diameter, the water no longer maintains the shape of a water drop but maintains the shape of a water film, and there is tension in the water film to maintain the water film in the circular airing hole, thereby keeping the circular airing hole watertight. Thus, almost all water can be blocked by the second circular airing hole 8. Even if little water penetrates the second circular ventilation hole 8, it will enter the first cavity a and not the second cavity B, thereby not affecting the pcb assembly 3 in the second cavity B.

Although the second circular airing hole 8 is formed on the passage wall 15 in fig. 4 and 5, the present invention is not limited thereto. The above-mentioned passage 14 may be omitted and the second circular airing hole 8 is formed in the first outer end wall 10 adjacent to the first chamber a.

As shown in fig. 2 and 3, at least one first circular airing hole 7 is provided on the inner partition wall 9 for communicating the first chamber a and the second chamber B. The first circular airing hole 7 has a hole diameter designed to allow air to pass through but to make water difficult to pass through.

Specifically, the pore size of the first circular airing hole 7 is designed such that water forms a water film in the first circular airing hole 7 by surface tension. In this way, even though little water penetrates the second circular vent 8 and enters the first cavity a, the water is blocked by the first circular vent 7 and does not enter the second cavity B, thereby not affecting the pcb assembly 3 in the second cavity B.

Through the arrangement of the second round air holes 8 and the first round air holes 7, when the control box is cleaned and heated to increase the internal pressure, air can flow out of the control box to balance the internal and external air pressures of the control box; when the control box is cleaned and cooled to reduce the internal pressure, air can enter the control box from the outside to balance the internal and external air pressures of the control box.

As described above, by designing the apertures of the second circular vent 8 and the first circular vent 7, the effect of preventing water from entering the control box, particularly the second cavity B where the printed circuit board assembly 3 is located, is also achieved while the venting effect is achieved.

Furthermore, as described above, by providing a partition wall between the first chamber a and the second chamber B and providing a buffer between the second chamber and the outside, water can be better prevented from entering the control box, particularly the second chamber B in which the printed circuit board assembly 3 is located.

Instead of or in addition to the second circular vent 8 and the first circular vent 7 described above, a third chamber (another buffer chamber) a3 separated by another inner partition wall 16 may be provided between the second chamber B and the second outer end wall 11. The second outer end wall 11 is adjacent to the outside of the control box and is the opposite end wall of the control box to the first outer end wall 10. The second outer end wall 11 may also be provided with an opening for passing through, for example, a mains power cable. Also, the main power cable is provided with a seal to prevent water from entering the sealed space of the control box. In this case, similar to the second circular airing hole 8 and the first circular airing hole 7 described above, circular airing holes may be provided also on the second outer end wall 11 and the other inner partition wall 16. The circular vent hole has a hole diameter designed to allow air to pass through but to prevent water from passing through. In this way, water is prevented from entering the second chamber B, while the air pressure inside and outside the control box is balanced.

The particular features, structures, materials, or characteristics described above may be combined in any suitable manner in this specification.

While the present invention has been described with reference to the above exemplary embodiments, it will be understood by those skilled in the art that various modifications may be made to the specific embodiments disclosed above, and the present invention is not limited to the above exemplary embodiments. The scope of the claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.