JP4937039B2 - Medical electronics housing - Google Patents

Description

  The present invention relates to a casing of a medical electronic device that is waterproof and that houses electronic components therein.

  Conventionally, the housing of a digital Holter electrocardiograph that digitizes and records the electrocardiogram information of a subject while wearing it on the subject's body is placed inside the housing that houses electronic components such as an IC memory and a CPU. Waterproofing is applied to prevent water from entering.

As for general waterproofing treatment, for example, as shown in Patent Document 1, a groove is formed on the entire circumference of the upper surface of the peripheral wall portion of the case body covered with the lid, and an elastically deformable packing is provided in the groove. It is inserted and arranged in a state of protruding upward from the upper surface of the peripheral wall portion. And the cover which has a projection part which presses a packing part is covered on the upper surface in which the packing was arrange | positioned, and a packing is pressed and fixed by a projection part. The lid is brought into surface contact with the peripheral wall portion through the packing crushed by the protrusions, so that the watertight state is maintained between the two.
JP-A-10-324360

  However, in the conventional case, when assembling the case, there is a problem that an operation of inserting the packing into the groove portion of the peripheral wall portion of the case body is necessary, and the operation is difficult.

  Moreover, in the said structure, the watertight state with a surrounding wall part is hold | maintained by crushing and deform | transforming the packing arrange | positioned in a groove part with a cover body. For this reason, when crushing the packing in the groove by covering the lid, the location where the volume of the compressed and crushed packing escapes is limited to the groove, so a large force is required to deform the packing itself. As a result, it is time-consuming to assemble and the case main body itself may be deformed by the applied force.

  The present invention has been made in view of the above points, and is a medical electronic device that can be easily assembled while ensuring waterproofness and can prevent distortion of the case body when the case body is covered with a lid. An object of the present invention is to provide a housing.

The housing of the medical electronic device according to the present invention has a frame-like shape surrounding an upper case covering an accommodating portion surrounded by the peripheral wall portion at an upper portion of a peripheral wall portion of a lower case in which an electronic component is accommodated. A medical electronic device casing that is fixed by being covered with an elastically deformable packing, wherein the upper portion of the peripheral wall portion has an upper surface adjacent to the outer wall surface of the peripheral wall portion, and than the outer wall portion is disposed in the housing part side, with adjacent to the inner wall surface of the peripheral wall portion, and an inner wall portion having a lower upper surface height than the upper surface of the outer wall portion, said outer wall portion A groove portion that is formed between the upper surface of the inner wall portion and the upper surface of the inner wall portion and opens upward, and the packing has an inner side portion on the upper surface of the inner wall portion on the upper surface of the inner wall portion. band that will be disposed so as to surround the accommodating portion in a state that extends out to the accommodating portion from above And the packing body, protrudes downward from the lower surface of the outer edge portion of the packing body, the formed by the fixing leg which is inserted into the groove, the upper case, the surface contact with the upper surface of the outer wall portion The packing main body is disposed on the upper surface of the inner wall portion, and is provided so as to protrude downward from the edge end portion from a portion facing the upper end of the inner wall portion and the upper surface of the inner wall portion. A pressing protrusion that presses the portion of the upper case and fixes the upper case to the lower case, the fixed leg portion inserted into the groove, and the outer surface of the inner wall portion facing the fixed leg portion. The structure which the space | gap is formed between the said packing main bodies is taken .

  ADVANTAGE OF THE INVENTION According to this invention, while ensuring waterproofness, while being able to assemble easily, distortion of a case main body can be prevented when a cover body is covered on the case main body.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an exploded perspective view showing a housing of a medical electronic device for explaining the housing of the medical electronic device according to one embodiment of the present invention.

  The medical electronic device shown in FIG. 1 is a digital Holter electrocardiograph 10 that digitizes and records electrocardiogram information of the subject over a long period of time while being worn on the subject's body.

  The digital holter electrocardiograph 10 is fitted into a box-shaped case main body (lower case) 110 in which electronic components such as an IC memory and a CPU are accommodated in the accommodating portion 112, and an opening edge portion of the case main body 110, A housing 100 is provided that includes a lid (upper case) 120 that covers an opening of the case body 110 from above.

  In the housing 100, the case main body 110 and the lid body 120 are held in a watertight state via the packing 130. The lid 120 is provided with a claw portion 121 that protrudes downward, while the case body 110 is provided with an engagement hole 111 with which the claw portion 121 is engaged.

  The casing 100 is fixed to the case main body 110 by being fitted to the case main body 110 in a state where the packing 130 is pressed by fitting the lid body 120 to the case main body 110 via the packing 130 and engaging the claw portion with the engagement hole. Is done. Here, the case main body 110 is configured such that the opening is covered by the lid 120 by fitting the claws and the engagement holes, but the present invention is not limited thereto, and the case main body 110 is covered by a fastening member such as a screw or a screw. It is good also as a structure to which the body 120 is fixed.

  FIG. 2 is a partially enlarged cross-sectional view showing the relationship between the case main body, the packing, and the lid in the housing of the medical electronic device.

  As shown in FIG. 2, the upper portion of the peripheral wall portion 140 surrounding the accommodating portion 112 in the case main body 110 is an outer wall portion 150, an inner wall portion 160, and these outer wall portions 150 provided around the opening. And a groove 170 between the inner wall 160 and the inner wall 160.

  The outer surface 152 of the outer wall portion 150 constitutes the outer surface of the peripheral wall portion 140, and the lower surface of the edge portion 122 of the lid 120 is in contact with the substantially horizontal upper surface 154 over the entire surface.

  The inner wall surface 162 of the inner wall portion 160 constitutes the inner surface of the peripheral wall portion 140 and has a substantially horizontal upper surface 164 having a height lower than that of the upper surface 154 of the outer wall portion 150. Further, the inner wall portion 160 is disposed opposite to the outer wall portion 150 so as to be spaced inward from the outer wall portion 150, and upwardly between the inner wall portion 160 and the outer wall portion 150. An opening groove 170 is formed.

  The inner wall portion 160 is formed such that the height of the upper surface 164 is lower than the height level of the upper surface 154 of the outer wall portion 150 by adding the thickness of the packing 130 to the upper surface 164. Yes. The outer wall surface 166 faces the inner surface 156 of the outer wall portion 150, and the inner wall 156 of the outer wall portion 150 forms an opposing wall surface facing the groove portion 170.

  An outer wall surface (outer surface) 166 of the inner wall portion 160 is an inclined surface inclined downward toward the bottom plate 172 of the groove portion 170, and the fixed leg portion 132 of the packing 130 inserted into the groove portion 170 is formed into the groove portion. Guide to the bottom plate 172 of 170.

  A packing body 134 of the packing 130 pressed by the lid 120 from above is provided on the entire upper surface 164 of the inner wall portion 160.

  The packing 130 is made of elastically deformable, and is a frame disposed around the opening on the upper surface of the peripheral wall 140 from silicone rubber, chloroprene rubber, ethylene propylene rubber, etc. that has good elasticity and good waterproof function. It has a shape.

  The packing main body 134 having a frame shape has a band shape, and a fixed leg portion 132 is provided on the lower surface of the outer side portion so as to protrude downward.

  The band-shaped packing body 134 is disposed on the inner wall portion 160 and is pressed against the lid body 120 from above to make the space between the inner wall portion 160 and the lid body 120 watertight, so Prevent water and other water from entering the housing.

  The outer diameter of the packing 130 is substantially the same as the inner diameter of the outer wall portion 150, and the width of the packing body 134 is wider than the width of the upper surface 164 of the inner wall portion 160. (Side part) 136 is arranged in a state of extending from the inner wall part 160 to the housing part side.

  The packing body 134 disposed substantially horizontally on the upper surface 164 of the inner wall 160 is pressed by the pressing protrusion 124 of the lid 120 from above and pressed by the protruding side 136 extending inward from the upper surface 164. The overhanging side 136 is in a deformed state due to the escape of its volume.

  The lid 120 is formed corresponding to the shape of the peripheral wall 140, and the peripheral edge 126 is disposed on the peripheral wall 140.

  The peripheral edge 126 of the lid 120 is in contact with the upper surface 154 of the outer wall 150, the edge 122, and protrudes downward from the edge 122, and the pressing protrusion is in surface contact with the packing 130 on the inner wall 160. Part 124 is provided.

  The pressing protrusion 124 includes a tip surface that comes into surface contact with the packing 130 at the tip, and makes surface contact with the packing 130 at the tip surface. That is, the pressing protrusion 124 is provided on the lid 120 so as to protrude downward from a portion facing the upper surface of the inner wall portion 160 and disposed on the upper surface of the inner wall portion 160 in the packing 130. Press the part.

  Thereby, the packing 130 is deformed and abuts on each of the inner wall portion 160 and the pressing projection portion 124 to keep the space between the inner wall portion 160 and the pressing projection portion 124 in a watertight state. The lid 120 is waterproofed.

  The lid 120 is attached from above with the fixed leg 132 inserted into the groove 170 and the packing body 134 disposed on the upper surface 164 of the inner wall 160 so that the packing 130 is disposed on the peripheral wall 140. It has been. In other words, the packing 130 is interposed between the inner wall 160 and the lid 120 with the fixed leg 134 inserted into the groove 170.

  In the housing 100 of the digital holter electrocardiograph 10 in the present embodiment, the upper surface 154 of the outer wall 150 is brought into surface contact with the edge 122 of the lid 120 by engaging the claw with the engaging hole. At the same time, the portion of the packing body 134 disposed on the upper surface 164 of the inner wall 160 is pressed by the pressing protrusion 124 of the lid 120.

  The packing 130 disposed on the upper portion of the peripheral wall 140 is disposed in a state in which an inner side portion (hereinafter referred to as an “extended side portion”) extends inward from the upper surface 164 (overhangs), A gap E is formed between the fixed leg 132 and the outer surface 166 of the inner wall 160 in the groove 170.

  That is, in the casing 100, the packing 130 that is interposed between the case main body 110 and the lid body 120 and is waterproofed between the two by being crushed between the two is disposed inside the upper surface portion of the peripheral wall 140. A part (the projecting side part 136) is arranged in a state where it protrudes inward from the inner wall surface of the peripheral wall part 140 to be a free end.

  As a result, the volume of the portion of the packing body 134 that is pressed by the pressing protrusion 124 of the lid 120 on the upper surface 164 causes the deformation of the protruding side portion 136 extending from the inner side of the upper surface 164 and the gap E to the gap E. Can be escaped by deformation.

  Further, in the casing 100, the upper surface of the packing 130 disposed on the inner wall portion 160 is lower than the upper surface 154 of the outer wall portion 150, and the upper gap portion is located above the side portion on the outer wall portion 150 side. F is formed. As a result, when the packing 130 is pressed by the pressing protrusion 124 of the lid body 120, the packing 130 can be deformed into the gap F and the volume due to pressing can be released.

  Therefore, it is possible to avoid distortion of the casing without causing a gap between the case main body 110 and the lid body 120.

  FIG. 3 is a view showing a method of assembling the housing by attaching a lid to the case body via packing.

  As shown in FIG. 3, a frame-shaped packing 130 is disposed inside the outer wall 150 in the peripheral wall 140 of the case main body 110.

  At this time, positioning is performed by inserting the fixed leg portion 132 of the packing 130 into the groove portion 170 in the upper portion of the peripheral wall portion 140, and the packing main body 134 is positioned on the upper surface 164 of the inner wall portion 160 on the inner side portion (the protruding side portion 136. ) In a state of protruding into the accommodating portion. Since the inner side surface 166 of the groove portion 170 is an inclined surface, the fixed leg portion 132 can be easily inserted into the groove portion 170 along the side surface 166.

  Accordingly, when the packing 130 is disposed on the case main body 110, the fixed leg portion 132 of the packing 130 can be smoothly guided into the groove portion 170 so that the packing 130 can be easily positioned. Improvements can be made.

  Next, the lid 120 is attached to the case main body 110 so as to cover the housing portion.

  When the lid 120 is attached, on the lower surface of the edge of the lid 120, first, the pressing protrusion 124 protruding inside is the upper surface 164 of the inner wall 160 having a height lower than the upper surface 154 of the outer wall 150. It abuts on the upper surface of the packing body 134 placed on the surface.

  The packing 130 is disposed on the peripheral wall 140 on the inner side and at a lower position than the outer wall 150, and the pressing protrusion 124 that presses the packing 130 from above protrudes most from the lower surface of the lid 120. It has become a part.

  For this reason, when the case body 110 is covered with the lid 120 from above, the pressing projection 124 can be positioned on the packing 130 while being guided by the inner surface of the outer wall 150. Therefore, when covering the cover body 120 on the case body 110, the cover body 120 can be easily attached without the packing 130 being displaced due to the contact of the outer edge of the cover body 120.

  Then, by locking the claw portion of the lid body 120 in the engagement hole of the case main body 110, the packing 130 is pressed downward by the pressing protrusion 124 and is brought into close contact with the upper surface 164 of the inner wall portion 160. As a result, the pressing projection 124 and the upper surface 164 of the inner wall 160 are fixed in a state where the watertight state is maintained by the packing 130.

  Further, in the waterproofing process in this configuration, the pressing force from the pressing protrusion 124 of the lid 120 is applied only to the portion of the packing body 134 that is placed on the upper surface 164 of the inner wall 160. Therefore, in the casing 100, the case main body 110 and the lid body 120 can be easily sealed by applying a pressing force only to the upper surface 164 of the inner wall portion 160 in the peripheral wall portion 140.

  As described above, according to the present embodiment, the lid 120 that covers the accommodating portion inside the peripheral wall portion 140 is placed on the upper portion of the peripheral wall portion 140 of the case main body 110 in which the electronic component is accommodated, and the frame surrounding the accommodating portion. A medical electronic device casing that is covered and fixed via a packing 130 in the form of an outer wall 150 having an upper surface adjacent to the outer wall surface of the peripheral wall 140, and an outer side The packing 130 includes an inner wall 160 that is disposed closer to the housing than the wall 150, is adjacent to the inner wall of the peripheral wall 140, and has an upper surface that is lower than the upper surface of the outer wall 150. On the upper surface of the inner wall portion 160, the inner side portion extends to the accommodating portion side so as to surround the accommodating portion, and the lid 120 is in surface contact with the upper surface of the outer wall portion 150. , On the upper surface 164 of the inner wall 160 It presses the packing main body 134 of Kkin 130 is fixed to the case body 110. Therefore, while ensuring waterproofness, it can assemble easily and can prevent distortion of the case body when the case body is covered with a lid.

  In the present embodiment, in order to position the packing 130 between the lid 120 and the case body 110 at a predetermined position, the fixed leg portion 132 is inserted into the groove portion 170 formed on the upper portion of the peripheral wall portion 140. However, the present invention is not limited to this. For example, a groove portion may be provided in the lid body 120 and a leg portion inserted into the groove portion may be formed on the upper surface side of the packing 130. Further, as the positioning of the packing 130, the packing 130 has a fixed leg portion 132. However, the packing 130 can be easily and accurately disposed at a predetermined position between the peripheral wall portion 140 and the lid body 120, so that the peripheral wall portion 140 and the lid 130 are covered. As long as the body 120 can be fixed, the fixed legs need not be provided. The peripheral wall 140, the lid 120, and the packing 130 may have any shape corresponding to the shape of the opening provided in the housing 100.

  The embodiment of the present invention has been described above. The above description is an illustration of a preferred embodiment of the present invention, and the scope of the present invention is not limited to this. That is, the description of the configuration of each device and the operation during use of each device is an example, and it is obvious that various modifications and additions to these examples are possible within the scope of the present invention.

The disassembled perspective view which shows the housing | casing of the medical electronic device for demonstrating the housing | casing of the medical electronic device which concerns on one embodiment of this invention Sectional drawing for showing the relationship between the case body, packing and lid in the housing of the medical electronic device The figure which shows the method of attaching a lid to a case body via packing, and assembling a case

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Housing | casing 110 Case main body 112 Accommodating part 120 Lid body 122 Edge end part 124 Pressing projection part 126 Peripheral part of lid body 130 Packing 132 Fixed leg part 134 Packing main body 140 Peripheral wall part 150 Outer side wall part 152 Outer surface 154 Upper surface 160 Inner side wall part 162 inner wall surface 164 upper surface 170 groove

Claims (3)

An upper case that covers the housing part surrounded by the peripheral wall part is covered and fixed on the upper part of the peripheral wall part of the lower case in which the electronic component is housed inside via a frame-like elastically deformable packing surrounding the housing part. A medical electronic device casing,
The upper part of the peripheral wall part is an outer wall part having an upper surface adjacent to the outer wall surface of the peripheral wall part,
It said outer wall portion is disposed in the housing portion than, with adjacent to the inner wall surface of the peripheral wall portion, and an inner wall portion having a lower upper surface height than the upper surface of the outer wall portion, the outer wall A groove portion formed between the upper surface of the portion and the upper surface of the inner wall portion and opening upward ,
The packing is
On the upper surface of the inner wall portion, and the belt of the packing body of the inner side portion Ru is disposed so as to surround the accommodating portion in a state that extends out to the accommodating portion from the upper surface of the inner wall portion,
Protruding downward from the lower surface of the outer side portion of the packing body, formed with a fixed leg portion inserted into the groove portion,
The upper case has an edge portion in surface contact with the upper surface of the outer wall portion ;
It is provided to project downward from the edge end portion from the portion facing the upper surface of the inner wall portion, and presses the portion of the packing body disposed on the upper surface of the inner wall portion. A pressing protrusion for fixing the upper case to the lower case ;
A gap is formed between the fixed leg portion inserted into the groove portion, the outer surface of the inner wall portion facing the fixed leg portion, and the packing body .
Case for medical electronic equipment. The outer surface of the inner wall portion is a downwardly inclined surface,
The housing of the medical electronic device according to claim 1 .   The upper surface of the packing is lower than the upper surface of the outer wall portion, and an upper gap portion is formed between the edge portion and the upper portion of the side portion on the outer wall portion side in the packing.
  The housing | casing of the medical electronic device of Claim 1 or 2.

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