JP5414248B2 - Oxygen concentrator - Google Patents

Description

  The present invention relates to an oxygen concentrator that introduces air and releases a high concentration of oxygen.

  Oxygen concentrators are mainly used in home oxygen therapy (HOT), where patients with respiratory illness inhale oxygen at home.

  The oxygen concentrator includes a sieve bed (adsorption tower) filled with an adsorbent (for example, zeolite) having a property of adsorbing nitrogen to pressurized air and desorbing nitrogen to decompressed air. An oxygen concentrator separates high-concentration oxygen from compressed air by compressing indoor air taken in through a filter and an intake tank with a compressor, and passing this compressed air through a sieve bed while repeatedly switching between pressurization and depressurization. . High-concentration oxygen is supplied to the patient through a nasal cannula worn by the patient during use.

For example, in the conventional oxygen concentrator described in Patent Document 1, a cannula hook is provided in a housing so that a patient can remove a nasal cannula and place it on the cannula hook when not in use. This cannula hook is a hinged cannula hook that can be opened and closed freely. When the nasal cannula is not in use, it can be opened and placed on the nasal cannula. can do.
JP 2004-188121 A

  In general, a hinge type cannula hook is provided with a means (for example, a coil spring) for biasing the cannula hook in each of the opening direction and the closing direction of the cannula hook to suppress the rotating behavior of the cannula hook. To fix the position of the cannula hook in the open or closed state.

  However, when the above configuration is adopted to fix the open / close state of the cannula hook, there is a problem that the number of parts increases and the manufacturing cost increases.

  The present invention has been made in view of such points, and an object thereof is to provide an oxygen concentrator capable of changing and fixing the open / close state of a hinge-type cannula hook and reducing the manufacturing cost. And

The oxygen concentrator of the present invention is
An oxygen concentrator having a housing and a hook body attached to the housing and capable of hanging a nasal cannula,
The housing is
Having a prismatic shaft,
The hook body is
A flexible frame that is externally fitted to the shaft body;
The frame is
A notch into which the shaft is fitted is formed from the end of the frame to the inside; and
The shaft body can be displaced between a closed state and an open state by rotating with the shaft body as a rotating shaft while elastically deforming with the notch fitted into the shaft body. Yes, and
In each of the closed state and the open state with respect to the housing, at least the opposite corner portions of the shaft body are covered so as to sandwich the opposite corner portions, and the outer peripheral portion of the shaft body is covered. Engage .

  ADVANTAGE OF THE INVENTION According to this invention, the oxygen concentrator which can change and fix the opening / closing state of a hinge-type cannula hook and can reduce manufacturing cost can be provided.

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

  FIG. 1 is a perspective view showing an appearance of an oxygen concentrator according to an embodiment of the present invention.

  The oxygen concentrator 100 is of a type mainly used in home oxygen therapy, and includes a filter, an intake tank, a compressor, a sieve bed, a pressure sensor, etc. (all not shown) that are necessary for producing high-concentration oxygen. ) Is housed in the housing 110. Since the internal configuration of the oxygen concentrator 100 may be the same as that of a conventional oxygen concentrator, detailed description thereof will be omitted here.

  The housing 110 is made of, for example, resin and is reduced in weight. Note that the housing 110 itself can be provided with sound insulation by making the housing 110 wooden. Moreover, since the main installation location of the oxygen concentrator 100 is in the patient's home, the casing 110 is formed thin in order to save space.

  The operation unit 120 is provided on the upper surface of the housing 110 for ease of operation. The operation unit 120 includes a power supply unit 121 of the oxygen concentrator 100, a control unit 122 for adjusting the flow rate of high-concentration oxygen, a display unit 123 for displaying the flow rate of high-concentration oxygen, and the oxygen concentrator. A transmitting unit 124 for transmitting 100 operation abnormalities to the outside (for example, maintenance service) and a connection unit 125 for connecting a tube (not shown) provided with a nasal cannula are provided.

  Concave portions are respectively provided in the upper side portion and the front portion of the case 110. The concave portion in the upper part of the side surface is provided as a hook accommodating portion 130. The hook accommodating part 130 accommodates a cannula hook 140 that is a hook body for hanging and placing the nasal cannula when not in use and is an openable / closable opening / closing body. The concave portion of the front portion is provided as a storage portion 150 for storing a spare nasal cannula, an instruction manual, and the like. Similarly to the cannula hook 140, an opening / closing door 160 that is an opening / closing body is attached to the storage unit 150.

  Since the hook accommodating part 130 is provided in the upper part of the left and right side surfaces, as shown in FIG. 2, the hook accommodating part 130 provided on the right side when viewed from the front of the oxygen concentrator 100 is also included in the oxygen concentrator 100. The cannula hook 140 can also be accommodated in a hook accommodating portion (not shown) provided on the left side when viewed from the front. The hook housing part 130 has a hook mounting part 131 inside. A cannula hook 140 is attached to the hook attachment portion 131.

  The cannula hook 140 is a resin hinge hook mainly having a hinge part 141 and an L-shaped hook part 142, and can be opened and closed with respect to the casing 110 by rotation. The cannula hook 140 forms a closed state with respect to the casing 110 when standing up. At this time, since it is completely accommodated in the hook accommodating portion 130, the risk that the patient or the like may be injured or the cannula hook 140 may be damaged by accidentally hitting the limb by the patient or the like is reduced. Further, the cannula hook 140 forms an open state with respect to the housing 110 when tilted. At this time, since the L-shaped hook part 142 protrudes from the hook accommodating part 130, the cannula hook 140 can be hung and placed there.

  FIG. 3 is a partial enlarged cross-sectional view of the casing 110 of the oxygen concentrator 100, and shows a state where the cannula hook 140 is attached to the hook accommodating portion 130. FIG. 3A shows a state where the cannula hook 140 is open with respect to the wall surface of the housing 110, and FIG. 3B shows a state where the cannula hook 140 is closed with respect to the wall surface of the housing 110.

  A shaft body 132 is provided on the hook mounting portion 131 of the hook housing portion 130. The shaft body 132 has a prismatic shape and extends horizontally in the front-rear direction of the oxygen concentrator 100. Moreover, the outer peripheral part of the shaft body 132 forms a square. The shaft body 132 is disposed such that a pair of right-angled portions at the diagonal position faces up and down, and another pair of right-angled portions at the diagonal position faces left and right.

  Further, the hook accommodating portion 130 is provided with a rib 134 so as to protrude from the inner wall portion 133 and enter the rotation trajectory of the cannula hook 140.

  The cannula hook 140 mainly has a hinge part 141 and an L-shaped hook part 142. The hinge part 141 includes a pair of clamping pieces 141a and 141b that clamp the shaft body 132. The sandwiching pieces 141 a and 141 b constitute a frame body that is externally fitted to the shaft body 132.

  The pair of clamping pieces 141a and 141b clamp the shaft body 132 from above and below when the cannula hook 140 is in an open state as shown in FIG. By sandwiching the shaft body 132 from above and below when the cannula hook 140 is in an open state, the pair of clamping pieces 141a and 141b can withstand a load of strength up to a certain level and reliably prevent the cannula hook 140 from falling off. can do. In the following description, when referring to one of the pair of sandwiching pieces 141a and 141b that is positioned below the shaft body 132 when the cannula hook 140 is in an open state, it is referred to as a “lower sandwiching piece 141a”. When referring to what is located above the shaft body 132 when the cannula hook 140 is in the open state, it is referred to as “upper clamping piece 141b”.

  The lower clamping piece 141a has a general shape extending linearly from the L-shaped hook portion 142, and a tail portion 143 extends linearly beyond that. When an overload is applied to the cannula hook 140 in the open state, the tip end portion of the tail portion 143 hits the lower portion of the rib 134 and the excessive turning behavior of the cannula hook 140 is prevented.

  The upper holding piece 141b is formed so as to branch from the lower holding piece 141a at the base end portion 145 and to face the lower holding piece 141a by providing an L-shaped notch 144 in the hinge part 141. The sandwiching pieces 141 a and 141 b sandwich the shaft body 132 from above and below at the respective intermediate portions 146.

  Further, the intermediate portion 146 of each sandwiching piece 141a, 141b is cut into a right angle so as to cover the right angle portion of the shaft body 132 and closely engage with the right angle portion of the shaft body 132, thereby forming a concave surface portion. Yes. Thereby, the posture of the cannula hook 140 in the open state shown in FIG. 3A and the posture of the cannula hook 140 in the closed state shown in FIG. Shaking can be prevented.

  When the intermediate portion 146 is engaged with the upper and lower right-angle portions of the shaft body 132, the posture of the cannula hook 140 is fixed, and when the intermediate portion 146 is engaged with the right and left right-angle portions of the shaft body 132. The closed posture of the cannula hook 140 is fixed. Here, the shaft body 132 is provided such that one pair of right-angle portions is arranged vertically, and the other pair of right-angle portions is arranged right and left. For this reason, the posture of the cannula hook 140 can be easily fixed to the open state only by releasing the right and left right-angle portions and engaging only the upper and lower right-angle portions. Similarly, the cannula hook 140 can be easily fixed in an open state only by releasing the upper and lower right-angle portions and engaging only the right and left right-angle portions.

  Moreover, the front-end | tip part 147 of each clamping piece 141a, 141b is formed so that it may expand rather than the intermediate part 146. FIG. Thereby, when an overload is applied to the cannula hook 140, the cannula hook 140 can be easily removed from the shaft body 132 due to the elastic deformation of the hinge portion 141.

  The configuration of the oxygen concentrator 100 has been described above.

  In addition, the shape of the outer peripheral part of the shaft body 132 may not be a square, and can be implemented with various changes. The shape of the outer periphery of the shaft body 132 can be arbitrarily determined so that the posture is fixed at a desired angle when the cannula hook 140 is in an open state. Therefore, the shape of the intermediate portion 146 of the sandwiching pieces 141a and 141b may not be a right angle, and various changes can be made according to the shape of the outer peripheral portion of the shaft body 132.

  Next, the opening and closing operation of the cannula hook 140 will be described with reference to FIG.

  When a force is applied to the L-shaped hook portion 142 in the direction indicated by the arrow Pa when the cannula hook 140 is tilted and opened as shown in FIG. The body 132 is rotated in the closing direction indicated by the arrow Ra with the rotation axis as a rotation axis.

  When the cannula hook 140 starts to rotate, the tightly fitted state between the intermediate portion 146 and the upper and lower right-angle portions of the shaft body 132 is released, and the intermediate portion 146 and the upper and lower right-angle portions of the shaft body 132 are slightly displaced from each other. Occurs. As a result, the intermediate portion 146 is pressed by the upper and lower right-angle portions of the shaft body 132, and the sandwiching pieces 141a and 141b are elastically deformed and spread, so that the posture of the cannula hook 140 can be changed. However, until the cannula hook 140 rotates and reaches a certain angle (for example, 45 degrees), the restoring force of the clamping pieces 141a and 141b due to elastic deformation is in the direction opposite to the rotation direction of the arrow Ra. By acting, the cannula hook 140 is urged in the direction opposite to the rotation direction of the arrow Ra. That is, the cannula hook 140 attempts to return to the original open state.

  A force is continuously applied in the pressing direction of the arrow Pa against the restoring force of the holding pieces 141a and 141b to return the cannula hook 140 to the open state, and the rotation width of the cannula hook 140 is a certain degree (for example, 45 degrees). The intermediate portion 146 straddles the right and left right-angle portions of the shaft body 132. As a result, part of the restoring force of the clamping pieces 141a and 141b also acts in the same direction as the rotation direction of the arrow Ra. If force is further applied in the pressing direction of the arrow Pa, the restoring force component acting in the same direction as the turning direction of the arrow Ra exceeds the restoring force component acting in the direction opposite to the turning direction of the arrow Ra, and the cannula hook 140 is urged in the rotation direction of the arrow Ra. As a result, the rotating behavior of the cannula hook 140 is accelerated, and the cannula hook 140 stands up at once.

  When the cannula hook 140 stands up, the intermediate portion 146 covers the right and left right-angle portions of the shaft body 132 as shown in FIG. Thereby, the position of the cannula hook 140 is determined, and the posture of the cannula hook 140 is fixed in a closed state with respect to the wall surface of the housing 110.

  Further, when a force is applied to the tail 143 in the direction indicated by the arrow Pb when the cannula hook 140 is in a standing and closed state as shown in FIG. It rotates in the opening direction shown by arrow Rb about 132 as a rotation axis.

  When the cannula hook 140 starts to rotate, the tightly fitted state between the intermediate portion 146 and the right and left right-hand portions of the shaft body 132 is released, and a slight shift occurs between the intermediate portion 146 and the right and left right-hand portions of the shaft body 132. Occurs. Thereby, the intermediate part 146 is pressed by the right and left right-angled parts of the shaft body 132, and the holding pieces 141a and 141b are elastically deformed and spread, so that the posture of the cannula hook 140 can be changed. However, until the cannula hook 140 rotates and reaches a certain angle (for example, 45 degrees), the restoring force of the sandwiching pieces 141a and 141b due to elastic deformation is in a direction opposite to the rotation direction of the arrow Rb. By acting, the cannula hook 140 is urged in the direction opposite to the rotation direction of the arrow Ra. That is, the cannula hook 140 tries to return to the original closed state.

  A force is continuously applied in the pressing direction of the arrow Pb against the restoring force of the holding pieces 141a and 141b to return the cannula hook 140 to the closed state, and the rotation width of the cannula hook 140 is about a certain degree (for example, 45 degrees). The intermediate portion 146 straddles the upper and lower right-angle portions of the shaft body 132. As a result, part of the restoring force of the clamping pieces 141a and 141b also acts in the same direction as the rotation direction of the arrow Rb. If force is further applied in the pressing direction of the arrow Pb, the restoring force component acting in the same direction as the turning direction of the arrow Rb exceeds the restoring force component acting in the direction opposite to the turning direction of the arrow Rb, and the arrow Rb The cannula hook 140 rotating in the rotating direction is biased. Thereby, the rotational behavior of the cannula hook 140 is accelerated, and the cannula hook 140 is tilted at a stroke.

  When the cannula hook 140 is tilted, the intermediate portion 146 covers the upper and lower right-angle portions of the shaft body 132 as shown in FIG. Thereby, the position of the cannula hook 140 is determined, and the posture of the cannula hook 140 is fixed in an open state with respect to the wall surface of the housing 110.

  In this way, the cannula hook 140 is biased in the same direction as the rotation direction or in the opposite direction by the restoring force of the holding pieces 141a and 141b during the rotation. Can be prevented from being fixed. Further, the rotating behavior of the cannula hook 140 is accelerated, and the cannula hook 140 is fixed at the same time as the posture of the cannula hook 140 is changed, so that a click feeling like a switch can be obtained in the opening / closing operation of the cannula hook 140.

  As described above, according to the present embodiment, the cannula hook 140 can be opened and closed without attaching another part such as a spring as in the prior art, and the position of the cannula hook 140 is open or It can be fixed in a closed state.

  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 operation at the time of use 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 perspective view which shows the external appearance of the oxygen concentrator which concerns on one embodiment of this invention The perspective view which shows the state which isolate | separated the cannula hook from the housing | casing in the oxygen concentrator which concerns on one embodiment of this invention. (A) The figure which shows the state which the cannula hook concerning one embodiment of this invention opened, (b) The figure which shows the state where the cannula hook concerning one embodiment of this invention closed

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Oxygen concentrator 110 Case 120 Operation part 121 Power supply part 122 Adjustment part 123 Display part 124 Transmission part 125 Connection part 130 Hook accommodating part 131 Hook mounting part 132 Shaft body 133 Inner wall part 134 Rib 140 Cannula hook 141 Hinge part 141a Lower holding Piece 141b Upper clamping piece 142 L-shaped hook portion 143 Tail portion 144 Notch 145 Base end portion 146 Intermediate portion 147 Tip portion 150 Storage portion 160 Opening and closing door

Claims (2)

An oxygen concentrator having a housing and a hook body attached to the housing and capable of hanging a nasal cannula,
The housing is
Having a prismatic shaft,
The hook body is
A flexible frame that is externally fitted to the shaft body;
The frame is
A notch into which the shaft is fitted is formed from the end of the frame to the inside; and
The shaft body can be displaced between a closed state and an open state by rotating with the shaft body as a rotating shaft while elastically deforming with the notch fitted into the shaft body. Yes, and
In each of the closed state and the open state with respect to the housing, at least the opposite corner portions of the shaft body are covered so as to sandwich the opposite corner portions, and the outer peripheral portion of the shaft body is covered. Engage,
Oxygen concentrator. When an overload is applied, the frame body is configured to be elastically deformed so that an end portion of the notch is wider than an inner side of the notch, so that the frame body is dropped from the shaft body. ,
The oxygen concentrator according to claim 1.

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