JP6613036B2 - Medical electronics - Google Patents

Description

The present invention relates to a medical electronic apparatus equipped with gaskets.

  Conventionally, in a general waterproof electronic device, a casing is formed by sandwiching a gasket (O-ring) between sealed portions to be waterproofed, for example, between openings of upper and lower casings each formed in a box shape. A structure for waterproofing the inside is known (see Patent Document 1).

  In Patent Document 1, the gasket is configured separately from the upper and lower casings, and is assembled so as to be sandwiched between the openings of the upper and lower casings. In this structure, the gasket is disposed along the openings of the upper and lower casings (that is, the mating portions) and is simply sandwiched between them. It is easy to fall off from the opening. Accordingly, various techniques are known so that a structure for waterproofing by attaching a gasket can be easily assembled.

  For example, in the structure in which the gap between the cylinder head and the head cover shown in Patent Document 2 is waterproofed with a gasket, a protrusion that protrudes in parallel with the direction of sandwiching the gasket at a position different from the position of sandwiching the gasket on one of the cylinder head and the head cover. Is forming. In a state where the gasket main body is disposed between the cylinder head and the head cover, the state where the gasket main body is positioned at a predetermined position is held by inserting the tip of the arm portion extending from the gasket main body into the protrusion. Thus, the cylinder head and the head cover are easily sealed without the gasket falling off from the attachment location even during assembly.

  By the way, when using a gasket for waterproofing a casing of an electronic device to be miniaturized, for example, when a gasket is provided between the battery housing portion and the lid, it is necessary to reduce the size of the gasket itself. For this reason, the gasket shape corresponding to the site | part used as a big waterproof object which waterproofs between a cylinder head and a head cover like the gasket shown in patent document 2 cannot be applied.

  On the other hand, as a waterproof structure applicable to a miniaturized housing, a structure shown in FIG. 1 is known. FIG. 1 is a cross-sectional view schematically showing a waterproof structure (a structure of a mating portion) using a conventional gasket. For example, in a configuration of a battery lid that closes a battery storage unit in a smartphone, one member (here, the lower housing) of the members to be waterproofed (for example, the upper and lower housings) is a resin molded product, and this resin molding There is known a structure in which a gasket 3 is fused and held by a two-color molding or an insert molding at a portion 1 to be waterproofed in a product (see FIG. 1A). Thus, while pressing the other portion (upper housing) 2 to be waterproofed against the gasket 3, between the upper and lower housings (between the portions 1 and 2 in which the lower housing and the upper housing are combined in FIG. 1A). Ensure waterproofness.

  Also, as shown in FIGS. 1B to 1D, a configuration is known in which grooves 4, 4 a, and 4 b in which the gasket 3 a is disposed are provided in one of the portions 1 a, 1 b, and 1 c of the upper and lower casings that are waterproof. ing. Corresponding to the shape of one part 1a, 1b, 1c to be waterproofed, the other part 2a, 2b, 2c to be waterproofed is formed. In these structures, the gasket 3a is placed in the groove portions 4, 4a, 4b of one part 1a, 1b, 1c so that the gasket 3a is crushed and sandwiched between the other parts 2a, 2b, 2c. One part 1a, 1b, 1c and the other part 2a, 2b, 2c can be joined to each other without dropping from the container, thereby improving the airtightness between the parts.

Japanese Patent No. 2723837 Japanese Patent No. 5300140

  However, in the waterproof structure using the conventional gasket, as shown in FIG. 1A, when the gasket (O-ring) is integrally formed on one of the upper and lower housings, even if it is attempted to replace only the gasket due to deterioration over time, It cannot be exchanged.

  Moreover, as shown to FIG. 1B, when forming the groove part 4 for the gasket 3a opened in the direction different from the direction which unites the other site | part 2a in one site | part 1a of the site | parts 1a and 2a used as waterproofing The part 1a having the groove part 4 has a complicated shape, and the mold for molding the part is also complicated, which increases costs.

  In addition to the configuration shown in FIG. 1B, as shown in FIGS. 1C and 1D, in order to improve airtightness, one part 1a of the parts 1a and 2a to be waterproofed (for example, one of the upper and lower casings) When the width of the groove portions 4, 4 a, 4 b is reduced, it is difficult to fit the gasket 3 a into the groove portions 4, 4 a, 4 b, making assembly difficult. Further, when the gaskets 3 and 3a are generally elastically deformable elastic bodies (for example, rubber molded products) having a closed shape such as an annular shape, tolerances and dimensional variations are large. Thereby, when the opening part of the upper and lower housings formed in a box shape has the structure shown in FIGS. 1B to 1D, the frame-like groove part 4 of the opening part (one part 1 a) of one housing, When fitting into 4a, 4b, if it is shorter than the dimension set with respect to the circumferential length of the grooves 4, 4a, 4b, it is difficult to fit because it is stretched and fitted more than necessary. Moreover, when the circumference of a gasket is longer than the dimension set with respect to the frame-shaped groove parts 4, 4a, and 4b, there exists a problem that a surplus (extra length) will generate | occur | produce and it will become harder to fit.

The present invention has been made in view of such points, and in particular, can be applied to portable portable medical electronic devices such as pulse oximeters, holter electrocardiographs, and medical telemeters, and can be easily reduced in size. it is possible to improve the waterproof (drip-proofness) at Do configuration, and an object thereof is to provide a medical Ryoyo electronic device that can be exchanged gasket only.

One aspect of the medical electronic device of the present invention is:
A gasket having an annular gasket body and an engagement piece projecting from the gasket body;
A box-shaped first housing;
A box-shaped or lid-shaped second housing assembled to the first housing via the gasket;
Have
An annular mounting groove formed on the mating portion of one of the first housing and the second housing so as to surround an internal space and to which the gasket body is mounted, and the mounting groove And a pair of opposing walls forming
Of the pair of opposing walls, a part of the inner wall portion that is the center side of the one housing with respect to the mounting groove is a concave wall portion that is recessed inward in the thickness direction of the inner wall portion. Yes,
The concave wall portion is formed with a concave fitting groove portion that opens in the mating direction of the first housing and the second housing, penetrates in the thickness direction, and fits the engaging piece portion. And
The gasket is configured such that the engagement piece portion is fitted in the fitting groove portion of the concave wall portion, and a part of the gasket main body is adjacent to the concave wall portion in a shape along the concave wall portion. and positioning the gasket body which is mounted in the mounting groove in a state of being nipped between the mating portion of the other side of the housing, interposed between the first housing and the second housing,
The area | region enclosed by the said concave-shaped wall part takes the structure by which the fastening member which fastens the said 1st housing | casing and a 2nd housing | casing is attached .

  ADVANTAGE OF THE INVENTION According to this invention, it can apply to a home medical electronic device, and even if it reduces in size, while being able to aim at improvement of waterproofness (drip-proof property) with a simple structure, only a gasket can be replaced | exchanged.

Sectional view schematically showing a waterproof structure using a conventional gasket FIG. 1 is an external view showing a medical electronic device for explanation of a gasket according to an embodiment of the present invention. Sectional drawing which shows the principal part structure of the medical electronic device The figure which looked at the upper case equipped with the gasket of one embodiment concerning the present invention from the back side Partial enlarged view of portion A shown in FIG. The perspective view which shows the state which removed the gasket of one Embodiment which concerns on this invention from the upper case Sectional view of the screw hole showing the gasket mounting state The top view which shows typically the modification of the gasket arrange | positioned along a wall part

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

  FIG. 2 is an external view showing a medical electronic device used for explaining a gasket according to an embodiment of the present invention, and FIG. 3 is a medical electronic device used for explaining a gasket according to an embodiment of the present invention. It is sectional drawing of an apparatus.

A medical electronic device 10 shown in FIG. 2 is an electronic device having a gasket (see FIG. 3) according to an embodiment of the present invention. Here, arterial oxygen saturation (SpO ₂ ) is non-invasively exposed to light. ) Is a pulse oximeter 10 as a medical electronic device. The medical electronic device may be a home medical electronic device, and can be used in the vicinity of a water facility.

  The pulse oximeter 10 includes a probe unit that acquires a biological signal using light from a predetermined part such as a fingertip, a main body unit that measures and records the arterial blood oxygen saturation by processing the acquired biological signal, a battery, And is configured to be attachable to the fingertip.

  The pulse oximeter 10 has a clip-like shape, and has an upper housing 20 and a lower housing 30, which are connected to each other so as to be opened and closed by a hinge portion (not shown).

  The upper housing 20 and the lower housing 30 are biased in a closing direction via a hinge portion in a normal state. Thereby, the pulse oximeter 10 can pinch the subject's finger M inserted in the direction of the arrow D2 into the finger insertion opening 12 between the upper housing 20 and the lower housing 30 with an appropriate force. it can.

  The upper housing 20 and the lower housing 30 constitute a probe unit. Although not shown in the drawings, the probe unit emits, for example, red light or infrared light toward the mounting site, for example, a light emitting element (for example, a light emitting diode), and a light receiving element that detects light transmitted through the mounting site or reflected from the mounting site. (For example, a photodiode).

  The pulse oximeter 10 has a signal processing circuit that performs measurement processing of arterial blood oxygen saturation using a detection signal of transmitted light or reflected light, and in this circuit, a light detection level synchronized with the pulse of arterial blood. Is compared between red light and infrared light, and the arterial oxygen saturation is calculated from the ratio.

  As shown in FIG. 3, the upper housing 20 and the lower housing 30 are hollow, and house the constituent elements 61 and 62 constituting the probe part and the main body part, respectively.

  The upper housing 20 and the lower housing 30 are configured to have a drip-proof property by closing the inside through gaskets 50 and 50A, thereby improving airtightness.

  The upper housing 20 is fixed by sandwiching the gasket 50 between the upper case 22 and the lower case 24 and pressing the gasket 50 between the upper and lower cases 22 and 24 (here, screwing with screws 60). Composed. The lower housing 30 is sandwiched between an upper case 32 and a lower case 34 with a gasket 50A formed in the same manner as the gasket 50, and the gasket 50A is pressed and fixed (here, a screw 60). It is configured by stopping). The structure using the gasket 50 </ b> A in the lower housing 30 is the same as the structure using the gasket 50 in the upper housing 20. Therefore, only the structure of the upper housing 20 will be described, and the structure of the lower housing 30 will be omitted.

  4 is a view of the upper case 22 fitted with the gasket 50 of one embodiment according to the present invention as seen from the back side, and FIG. 5 is a partially enlarged view of a portion A shown in FIG.

  The upper case 22 shown in FIG. 4 is formed in a box shape, and a groove portion (attachment) in which the gasket main body 52 of the gasket 50 is attached to an opening edge portion 221 that is a joint portion with the lower case 24 (see FIGS. 2 and 3). Groove) 223 is provided. In addition, a rectangular frame-shaped protrusion 246 (see FIG. 7) formed in the opening edge 241 that is a mating portion on the lower case 24 side is inserted into the groove 223 in a state where the gasket main body 52 is mounted. The

  The opening edge portion 221 is a protruding end portion (corresponding to the lower end portion of the upper housing 20 as the pulse oximeter 10) of the upper case 22 that protrudes perpendicularly from the outer periphery of the rectangular surface portion 22a. The opening edge 221 is configured in a shape corresponding to the opening edge 241 of the lower case 24 (corresponding to the mating portion, see FIG. 7). The upper case 22 and the lower case 24 are assembled in a state where the airtightness of the hollow interior is improved via the gasket 50 at the mutual mating portion (opening edge 221 and opening edge on the lower case side).

Here, the gasket 50 will be described.
FIG. 6 is a perspective view showing a state where the gasket 50 according to the embodiment of the present invention is removed from the upper case 22.

  The gasket 50 shown in FIGS. 4 to 5 includes an annular gasket main body 52, a fitting piece (engagement piece) 54 protruding from the gasket main body 52, and a latching portion (engagement piece) 56. Have.

  The gasket 50 is formed so as to be elastically deformable, and the gasket body 52 is disposed between the mating portions of the upper case 22 and the lower case 24 (here, in the groove portion 223), and the interior of the upper case 22 is disposed inside. Constructed to surround.

  FIG. 7 is a cross-sectional view of the screw hole portion showing the gasket 50 attached state.

  The gasket main body 52 shown in FIG. 4 to FIG. 7 is formed on the mating portion of the upper case 22 (the opening edge portion 221 and specifically the protruding end portion of the peripheral wall portion 22b) among the mating portions of the upper and lower cases 22 and 24 assembled together. It arrange | positions adjacent to the wall part 221a protruded in the alignment direction. The wall portion 221a will be described later.

  Here, the gasket body 52 has a circular cross section and is formed in an annular shape along the opening edge of the upper case 22. The gasket body 52 may be formed in a rectangular frame shape. The gasket main body 52 has an annular (here, rectangular frame-shaped) portion that surrounds the opening portion between the upper and lower cases 22 and 24 by the mating portion of the upper and lower cases 22 and 24 (specifically, the groove portion 223 and the protrusion 246). It is crushed almost evenly to ensure airtightness. In FIG. 7, the gasket main body 52 before being crushed with a broken line is shown. As a result, the gasket main body 52 is pressed between the upper and lower cases 22 and 24.

  The fitting piece portion 54 is provided so as to protrude from the portion different from the portion located in the direction in which the gasket main body 52 is pressed and clamped by the upper and lower cases 22 and 24 toward the wall portion 221a. The fitting piece portion 54 is fitted in the fitting groove portion (recessed portion) 225 of the wall portion 221a to position and support the gasket body 52 at a position adjacent to the wall portion 221a.

  As shown in FIGS. 4 to 7, the wall portion 221 a constitutes one (inner side) opposing wall portion among the opposing wall portions that partition the groove portion 223. The wall portion 221 a is provided in a rectangular frame shape along the opening edge portion 221 at the opening edge portion 221 of the upper case 22. By the wall portion 221a and the wall portion facing the wall portion 221a, the groove portion 223 is formed at the protruding end portion of the peripheral wall portion 22b surrounding the opening portion in the upper case 22 so as to surround the opening portion. The protruding end portion (opening edge portion 221) of the peripheral wall portion constitutes a mating portion that is combined with the rectangular frame-shaped opening edge portion of the lower case 24.

  A screw hole 27 for assembling and fixing the lower case 24 to the upper case 22 is formed in the opening edge portion 221. The upper and lower cases 22 and 24 are fixed to each other by a screw 60 (see FIGS. 3 and 7) inserted into the screw hole 27.

  As shown in FIGS. 4 and 5, a part of the wall portion 221 a constituting the groove portion 223 in the vicinity of the screw hole 27 is a wall toward the inside of the upper case 22 so as to avoid the screw hole 27 at the opening edge portion 221. It is the curved wall part 2211 formed in the concave shape by retreating in the thickness direction. As a result, the wall 221a has an alcove-shaped portion surrounding the screw hole 27 (screw hole forming portion) by the curved wall portion 2211 at the opening edge 221.

  Thus, even when the upper and lower cases 22 and 24 are assembled via the screws 60, the locations where the upper and lower cases 22 and 24 are fixed (screw hole forming portions) are located on the outer periphery of the gasket 50. Airtightness can be secured.

  Also, a concave fitting groove (concave portion) 225 that opens in the mating direction (the lower case 24 direction) and penetrates in the thickness direction of the wall portion is formed in the curved wall portion 2211 that curves in a concave shape in the wall portion 221a. Has been.

  A fitting piece 54 of the gasket 50 is inserted into the fitting groove 225 while being elastically deformed. Thereby, the gasket main body 52 is supported so that it may be located in the groove part 223 in the position along the wall part 221a. In addition, the fitting piece portion 54 disposed in the fitting groove portion 225 is inserted through the wall portion 221a in the thickness direction, and the wall portion 221a (curved wall) is formed by the latching portion 56 formed at the tip of the fitting piece portion 54. Part 2211). Thereby, the latching | locking part 56 functions as a retainer which prevents the fitting piece part 54 from coming out to the gasket main body 52 side, ie, the outer side of the wall part 221a. The latching portion 56, together with the fitting piece portion 54, constitutes an engagement piece portion that positions and supports the gasket main body 52 at the arrangement position (arrangement position adjacent to the wall portion 211a) by engaging with the wall portion 211a. To do. Moreover, when the latching part 56 is provided with a recess and a jig is hooked in the recess, the work becomes easy when the latching part 56 is positioned on the back surface of the wall part 221a. Moreover, since the through-hole is not formed in the latching | locking part 56, it is easy to perform the shaping | molding.

  In assembling the upper housing 20, first, the components 61 and 62 of the probe unit and the main body unit are appropriately assembled in the upper and lower cases 22 and 24 constituting the upper housing 20, respectively.

  On the other hand, the gasket 50 is attached to the groove 223 of the upper case 22. At this time, the gasket main body 52 is fitted and disposed in the groove 223, the fitting piece 54 is pushed into the fitting groove 225 of the wall 221a, and the hook 56 is fitted to the wall 221a. It positions so that it may protrude on the back surface (surface inside the upper case 22) side. The fitting piece portion 54 is fitted into the fitting groove portion 225 by fitting the gasket body 52 into the groove portion 223 and pulling the latching portion 56 to the back side of the wall portion 221a to fit the fitting piece portion 54. It may be performed by being positioned on the groove portion 225 and pushing.

  In this state, even if the fitting piece portion 54 is elastically deformed and contracts in the extending direction of the fitting piece portion 54, the hooking portion 56 is hooked on the back surface of the wall portion 221a. Accordingly, the fitting piece portion 54 is restricted so as not to come out of the fitting groove portion 225, that is, so as not to come off to the gasket main body 52 side (outside the wall portion 221a). Further, the fitting piece portion 54 that is hooked to the back surface of the wall portion 221a by the hooking portion 56 is elastically deformed, thereby pulling the gasket main body 52 that pulls the gasket main body 52 inside the wall portion 221a within the groove portion 223. It supports so that it may be located along the wall part 221a which comprises one side of the opposing wall part of the groove part 223. FIG.

  Accordingly, the gasket 50 is held in the groove portion 223 at the protruding end portion (opening edge portion 221) of the peripheral wall portion 22b of the upper case 22. Then, the lower case 24 is assembled to the upper case 22. At this time, the gasket 50 is held at the arrangement position by the fitting with the fitting piece portion 54 and the fitting groove portion 225. Therefore, the gasket main body 52 of the gasket 50 can be pressed and sandwiched between the upper case 22 and the lower case 24 without dropping from the groove 223. That is, at the time of assembling, the direction at the time of assembling such as assembling in a state where the gasket 50 is first placed at the arrangement position is not restricted so that the gasket 50 is not dropped from the arrangement position. Then, by inserting and tightening the screw 60 into the screw hole 27, the entire gasket body 52 is pressed between the upper and lower cases 22 and 24 in the alignment direction of the upper and lower cases 22 and 24, and is crushed uniformly uniformly. The upper and lower cases 22 and 24 can be assembled while being deformed. Similarly to the gasket 50, the gasket 50 </ b> A is interposed between the lower case 24 and the upper case 22 constituting the lower housing 30 and can be assembled in a state where the upper and lower cases 22 and 24 are sealed.

  As described above, the gasket 50 according to the present embodiment has the gasket main body 52 held at a predetermined position in the groove portion 223 via the fitting piece portion 54. The upper and lower cases 22 and 24 constituting the body 20 can be easily assembled. In this configuration, it is not necessary to integrate the gasket 50 into one of the upper and lower cases 22 and 24 by two-color molding, so it is necessary to select a material with good compatibility between the upper and lower cases 22 and 24 and the gasket 50 when performing two-color molding. There is no. Further, it is not necessary to prepare a mold for two-color molding which is more costly than individual molding.

  Further, in the upper housing 20, in the vicinity of the screw hole 27, a concave shape (curved wall portion) that opens to the side by denting a part of the wall portion 221 a located inside the upper case 22 relative to the screw hole 27. 2211).

  For this reason, it is possible to prevent water from entering the inside of the upper and lower cases 22 and 24 that are airtight by the gasket 50 from the screw holes 27 arranged between both members of the upper and lower cases 22 and 24 in terms of the function.

  Thus, according to the present embodiment, as a medical electronic device, it is possible to improve the simple waterproof property (drip-proof property) with a simple configuration even if it is downsized, and only the gaskets 50 and 50A. Can be exchanged.

  Further, when the gasket main body 52 is disposed in the groove portion 223 positioned around the opening in the upper case 22, if the gasket is a closed shape, in the conventional configuration, the gasket main body 52 is caused by tolerance or variation in molding. Therefore, it is difficult to fit the above-mentioned size because it is necessary to pull the extra length or force the extra length to fit the shape of the arrangement position. In particular, when a surplus length occurs, in this embodiment, a concave portion (curved wall portion 2211) is formed in a part of the inner wall portion of the groove portion 223 facing wall portion formed along the peripheral portion. Therefore, the gasket main body 52 can be disposed along the curved wall portion 2211 that is the concave wall portion. Thereby, the surplus part of the frame-shaped or annular gasket main body 52 in the gasket 50 can be absorbed, and it can mount suitably. Further, since the curved wall portion 2211 that is a concave portion is formed so as to be recessed inward so as to avoid the screw hole 27, even when the upper and lower cases 22, 24 are fixed with the gasket 50 sandwiched by the screw 60. Water does not enter the upper housing 20 through the screw holes 27.

  In the present embodiment, the hooking portion 56 of the gasket 50 is formed at the tip of the two fitting piece portions 54 that fit into the two fitting groove portions 225 around the screw hole 27, respectively. However, the present invention is not limited to this, and may be formed in any manner as long as it can be hooked on the wall portion 221a. For example, the hook 56 itself may be formed in a prismatic body having an outer shape larger than the width of the fitting groove 225. Moreover, it is good also as a structure which connects the two latching | locking parts 56 shown in FIG. 5, and latches on the back surface side of the circular-arc-shaped part between the fitting groove parts 225 in the curved wall part 2211 in this joined part.

Further, the gasket 50 may be any structure that engages with the wall portion 221a so as to be positioned adjacent to the wall portion 221a formed on one of the mating portions to be the waterproof portion when the waterproof portion is assembled. May be configured. FIG. 8 is a plan view schematically showing a modified example of the gasket arranged along the wall portion 221a.
A gasket 50A shown in FIG. 8 has a gasket body 52 similar to the gasket 50, and is different only in the configuration of the engaging piece. Therefore, in the following description, the same components as the components of the gasket 50 are denoted by the same reference numerals and description thereof is omitted.

The gasket 50A includes a gasket main body 52, an elastic piece portion 54A that is integrally formed with the gasket main body 52, and protrudes from a portion different from the portion located in the direction in which the gasket 52 is pressed and clamped. And a latching portion (head) 56A formed at the tip.
The elastic piece portion 54A is provided so as to protrude from the gasket main body 52 toward the wall portion 221a, and is located in a concave portion of the wall portion 221a.
The length L in the protruding direction of the elastic piece portion 54A is shorter than the thickness T of the wall portion 211a having the fitting groove portion (concave portion) 225 to be arranged.
The elastic piece portion 54A is elastically deformed to hook the hook portion 56A to the opening edge of the back surface of the wall portion 221a in the fitting groove portion (recessed portion) 225 of the wall portion 221a. Since the gasket main body 52 and the hooking portion 56A are also integrally formed as a gasket 50A together with the elastic piece portion (elastic deformation portion) 54A, both can be elastically deformed.

The hooking portion 56A is disposed so as to protrude toward the back surface (the inner surface of the upper case 22) of the wall portion 221a, and is formed to be larger than the opening width of the back surface of the wall portion 221a. 56 A of latching parts are attached to wall part 221a, latching on the back surface of wall part 221a by elastic deformation of elastic piece part 54A. That is, the wall 211a is sandwiched between the latching portion 56A and the gasket main body 52, so that the latching portion 56A and the elastically deforming portion 54A place the gasket main body 52 along the wall portion 211a (here Then, it is a place where it is pressed and clamped, and specifically, it is supported in a state in which it is positioned in the fitting groove (recessed portion) 225 and at a position where it is pressed against the protruding portion 246).
56 A of latching parts comprise the engagement piece part which positions and supports the gasket main body 52 in the arrangement position adjacent to the wall part 221a with 54 A of elastic pieces. According to this gasket 50 </ b> A, the same effect as that of the gasket 50 can be obtained, and furthermore, the expansion / contraction piece portion 54 </ b> A corresponding to the fitting piece portion 54 of the gasket 50 is not configured to be fitted inside the recess 225. Thereby, in order to secure the fitting strength for positioning the gasket main body 52, it is not necessary to secure the fitting between the recess 225 and the member in the recess 225, and the mounting space can be made smaller than the gasket 50. .

  In this embodiment, the pulse oximeter is applied as the medical electronic device. However, the present invention is not limited to this, and any device may be applied as long as it is a portable medical electronic device. That is, the present invention may be applied not only to medical electronic devices that can be carried by patients such as Holter electrocardiographs and medical telemeters, but also to devices that are carried by medical personnel.

  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 the apparatus and the shape of each part 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 medical electronic device according to the present invention is applied to portable portable medical electronic devices such as pulse oximeters, Holter electrocardiographs, medical telemeters, etc., and is waterproof with a simple structure even if it is downsized. (Drip-proof property) can be improved and only the gasket can be replaced.

10 Pulse oximeter (medical electronic equipment)
12 finger insertion slot 20 upper housing 22, 32 upper case 22a surface portion 22b peripheral wall portion 24, 34 lower case 27 screw hole 30 lower housing 50, 50A gasket 52 gasket body 54 fitting piece (fitting piece)
54A Elastic piece (elastic deformation part)
56, 56A Hanging part 60 Screw 221, 241 Opening edge (matching part)
221a Wall part 223 Groove part (mounting groove)
225 Fitting groove (recess)
246 Projection 2211 Curved wall

Claims (5)

A gasket having an annular gasket body and an engagement piece projecting from the gasket body;
A box-shaped first housing;
A box-shaped or lid-shaped second housing assembled to the first housing via the gasket;
Have
An annular mounting groove that is formed so as to surround an internal space in the mating portion of one housing among the mating portions of the first housing and the second housing, and the mounting groove And a pair of opposing walls forming
Of the pair of opposing walls, a part of the inner wall portion that is the center side of the one housing with respect to the mounting groove is a concave wall portion that is recessed inward in the thickness direction of the inner wall portion. Yes,
The concave wall portion is formed with a concave fitting groove portion that opens in the mating direction of the first housing and the second housing, penetrates in the thickness direction, and fits the engaging piece portion. And
The gasket is configured such that the engagement piece portion is fitted in the fitting groove portion of the concave wall portion, and a part of the gasket main body is adjacent to the concave wall portion in a shape along the concave wall portion. In a state where the gasket main body mounted in the mounting groove is positioned and pressed against the mating portion of the other casing, the gasket main body is interposed between the first casing and the second casing .
A fastening member for fastening the first housing and the second housing is attached to the region surrounded by the concave wall portion .
Medical electronic equipment. The engagement piece portion has a fitting piece portion that is fitted in the fitting groove portion and supports the gasket main body with the mounting groove.
The medical electronic device according to claim 1. The engaging piece portion is
A head larger than the opening width of the fitting groove,
The head is interposed between the head and the gasket main body, is disposed in the fitting groove, and is elastically deformed to hook the head on the back surface of the opening of the fitting groove in the concave wall. An elastic piece to be
Having
The medical electronic device according to claim 1. At the tip of the fitting piece portion, at least a part of the outer shape is larger than the opening width of the fitting groove portion of the concave wall portion, and is hooked on the back surface of the concave wall portion and arranged in the internal space. A retaining part is formed,
The medical electronic device according to claim 2. The gasket body has a circular cross section;
The medical electronic device according to any one of claims 1 to 4.