TWI603697B - Toilet seat and portable toilet with this seat - Google Patents

Description

Toilet seat and portable toilet with the toilet seat

The present invention relates to a toilet seat mounted on a portable toilet (mobile toilet) and a portable toilet equipped with the toilet seat, and more particularly to a toilet seat and a portable toilet having the toilet seat, the toilet seat The outer shape of the front side of the toilet seat is bent and retracted more convexly toward the rear than the tip end portion of the opening of the toilet seat, thereby preventing the skin from being clipped on the back side of the user's thigh. Into, and increase the degree of freedom of the user's sitting position.

In a portable western toilet or a portable toilet (mobile toilet) for excreting elderly people and physically handicapped persons in the living room, the user installs the toilet in order to sit in the toilet. The toilet seat used. The toilet seat prevents the user's thigh or buttock from directly contacting the opening edge of the toilet when the user sits in the toilet, and supports the user's thigh or buttocks to function. In addition, in the toilet seat, there are two types of U-shapes in which the edge of the opening is opened and the O-shape in which the edge of the opening is closed. However, in recent years, the deformation of the mounting portion of the toilet is small. The use of a shaped toilet seat is the mainstream.

However, in recent years, portable toilets generally have armrests and backrests. In many cases, the flat portion in which the seat is seated is placed, and the whole portion is approximately square in order to support the armrest, the backrest, and the like. Therefore, if the shape of the toilet seat is made O-shaped in the portable toilet, a gap or a step may be generated along the outer edge of the O-shaped toilet seat between the O-shaped toilet seat and the approximately square flat portion, and The gap or the step is arranged such that the back side of the thigh of the user sitting is traversed obliquely. Therefore, in the portable toilet in which the shape of the toilet seat is O-shaped, if the user sits on the toilet seat, if the foot is moved, the skin on the back side of the thigh portion may be caught between the toilet seat and the toilet body. A problem in which a gap or a step difference occurs between the flat portions.

Here, as disclosed in Japanese Laid-Open Patent Publication No. 2005-000387 (Patent Document 1), JP-A-2010-240165 (Patent Document 2), and JP-A-2012-152256 (Patent Document 3) In order to make a gap or a step which occurs between the toilet seat and the flat portion of the toilet body, the side of the thigh of the user who is sitting down is not traversed obliquely, and the shape of the toilet seat is developed. Square seat. That is, if the outer shape of the toilet seat is formed to be approximately square, a gap or a step which occurs between the toilet seat and the flat portion of the toilet body can be formed on the outer side of the user's thigh.

However, compared with the O-shaped toilet seat, the above-mentioned approximately square toilet seat, the both ends of the front edge of the toilet seat protrude toward the front, so if the user sits in the rear of the toilet seat, the back side of the knee touches the opposite front side. The front edge of the toilet seat, and there is a problem that can not be deeply seated.

Moreover, usually, in the portable toilet, the front edge of the toilet seat is approximately coincident with the front end portion of the toilet body portion, and further at both ends of the front end portion of the toilet body portion. Pillars for the installation of handrails nearby. Therefore, if the front side of the user's knee does not touch the front edge of the toilet seat on the opposite front side, and the both ends of the front edge of the toilet seat retreat toward the rear of the toilet body portion, the toilet body portion is Since both ends of the front end portion must also retreat toward the rear of the toilet body portion, there is a problem in the installation portion of the pillar of the portable toilet that has lost the armrest.

Further, a portable toilet having an armrest and a backrest is provided, and an armrest and a support armrest are disposed outside the toilet seat to be placed. And the toilet seat is rotatably mounted to the toilet body, so that when the toilet seat is rotated, the shape of the toilet seat must be such that it does not interfere with the design of the armrest and the support pillar.

[Previous Technical Literature]

(Patent Literature)

Patent Document 1: Japanese Laid-Open Patent Publication No. 2005-000387

Patent Document 2: Japanese Laid-Open Patent Publication No. 2010-240165

Patent Document 3: Japanese Laid-Open Patent Publication No. 2012-152256

Accordingly, it is an object of the present invention to provide a toilet seat that is placed on a rectangular toilet bowl (mobile toilet) for use in order to prevent skin from being caught on the back side of the user's thigh. In the toilet seat, when the toilet seat is rotated, the armrest of the toilet body portion and the support armrest pillar are not interfered, and the user is deeply seated in the rear.

Moreover, it is an object of the present invention to provide a toilet seat and a toilet seat therewith In the portable toilet, the front edge of the toilet seat and the front end portion of the toilet body portion do not interfere with the free movement of the user's foot, except that the installation space of the pillar of the armrest is secured on the flat portion of the toilet body portion.

Further, an object of the present invention is to provide a portable toilet in which a rib or the like can be removed from the surface of the toilet body portion by ensuring necessary strength in a portable toilet to which the above-described toilet seat is attached. The step difference maximizes the use of features on the shape of the toilet seat and its effects, and as a result, allows the user to sit from the portable toilet station and toward the portable toilet with a little movement.

The present inventors have repeated the in-depth review of the shape or arrangement of the toilet seat mounted on the portable toilet having the armrest and the backrest, and found that the basic shape of the shape of the toilet seat is approximately square, and the toilet seat is made. Both sides of the leading edge are bent and retracted more convexly toward the rear than the tip end portion of the opening of the toilet seat, whereby the skin on the back side of the user's thigh can be prevented from being caught, and the user can deeply sit in the seat. The rear of the invention is completed.

Specifically, according to the present invention, a toilet seat is provided, which is a toilet seat that is placed on a portable toilet and has a closed portion that is closed around the first side edge, which is located outside the toilet seat and from the opening portion. The tip end portion is located at a rearmost first end to the rear of the toilet seat and extends in a substantially linear manner; the second side edge is on the opposite side of the first side edge and on the outer side of the toilet seat, from the tip end of the opening portion The second end portion of the rear portion extends to the rear portion of the toilet seat and extends in a substantially linear manner; and the leading edge extends from the first end portion to the protruding portion located further forward than the tip end portion of the opening portion Second end Up to now, and including a curved portion having a first inflection point between the first end portion and the protruding portion, and having a second inflection point between the second end portion and the protruding portion.

Moreover, according to the present invention, a toilet seat is provided, which is a toilet seat that is placed on a portable toilet and has an oval-shaped opening portion that is closed around; the first side edge is on the outer side of the toilet seat, and is larger than the opening portion. a tip end portion of the first side edge extending rearward to a rear side of the toilet seat, and a width of the toilet seat section in a cross section orthogonal to a tangent to the first side edge to follow from the rear of the toilet seat The front portion is continuously reduced and thereafter continuously enlarged; the second side edge is on the opposite side of the first side edge and on the outer side of the toilet seat, from the second end that is located further rearward than the tip end portion of the opening portion a second side edge extending to the rear of the toilet seat, and a width of the toilet seat section in a cross section orthogonal to a tangent to the second side edge continuously decreases from the rear portion toward the front portion of the toilet seat, and thereafter a continuously enlarged arrangement; and a leading edge extending from the first end to the second end via a protruding portion located further forward than the tip end portion of the opening, and including a curved portion having the curved portion First end and protruding Inflection point between the first and the second end having a second portion to the inflection point between the projecting portion.

Here, the portable toilet according to the present invention is a mobile toilet disclosed in Patent Documents 1 to 3 for use in excreting elderly people and physically disabled persons in a living room or the like. Moreover, in the concept of the portable toilet, in addition to the main portable toilet made of a resin material, the outer frame or the foot other than the toilet of the portable toilet made of a material such as wood, Handrails, backrests, etc., also known as portable toilets.

The "front portion" in the present invention refers to an area in which an adult user is placed near the front side of the user's ventral side and the portable toilet when the seat is seated; and the "rear" means When the user sits down on the toilet seat, the user is placed in the area near the back of the user and the rear of the portable toilet. Moreover, the "end portion" of the side edge of the toilet seat refers to a side edge that extends in the longitudinal direction of the toilet seat, and the front edge that extends in the width direction of the toilet seat is a corner portion that changes substantially in the direction, and the corner portion is not only the tip end. The corner portion may also be a rounded portion having R.

The toilet seat of the present invention is not a general-mounted western toilet, but is particularly suitable for being placed on a portable toilet and used.

The reason is that one of the objects of the present invention is to solve the problem of the front end of the accompanying toilet body portion in the case where the both ends of the front edge of the approximately square toilet seat are retracted toward the rear of the toilet body portion in the portable toilet. Both ends of the portion also retreat toward the rear of the toilet body portion, causing a problem of the installation space of the pillars of the armrest being lost in the plane portion of the portable toilet. Moreover, an important problem to be solved by the present invention is that in the portable toilet in which the armrest and the support armrest are disposed on the outer side of the toilet seat, the shape of the toilet seat is formed so as not to interfere with the handrail when the toilet seat is rotated or Support the pillars of the armrests.

The toilet seat of the present invention has a peripherally closed opening and is a so-called O-shaped toilet seat. Further, the toilet seat of the present invention has the first and second side edges extending from the end portion of the opening portion at the rear end portion to the rear portion of the toilet seat, and extending substantially linearly, and having an overall shape on the outer side of the toilet seat. Square shape. In addition, the "edge" in the present invention means the outline of the toilet seat shown in plan view and the end surface forming the outline. Also, "about linear" means A line segment connecting the two separated points at a shortest distance as long as the distance is approximately the same as the straight line, not only a strictly defined straight line, but also a fold line slightly curved into a "ㄑ" shape or a slightly curved line drawn in a large arc Curved curve.

Thus, the toilet seat of the present invention has an approximately square shape having first and second side edges on the outer side of the toilet seat, from the tip end portion of the opening portion to the rear portion of the toilet seat, in a substantially linear shape Extending and juxtaposed in parallel; and having an inner edge that defines an opening such as an O-shape or an egg shape on the inner side of the toilet seat. Therefore, the width of the toilet seat section in the cross section orthogonal to the tangent to the first side edge and the width of the toilet seat section in the cross section orthogonal to the tangent to the second side edge are all from the toilet seat. The rear portion is continuously reduced toward the front portion, and thereafter continuously expands.

Since the outer shape of the toilet seat of the present invention is approximately square, as described above, the seat surface of the toilet seat can be made to have a sufficient size, and even if the armrest and the support armrest are adjacently disposed on the first and second side edges of the toilet seat. On the outside, when the toilet seat is rotated, the toilet seat does not interfere with the handrail and the pillar supporting the handrail.

If the first side edge and the second side edge of the toilet seat are arranged, for example, in a "eight-shaped shape", and if the seat surface of the toilet seat is made to have a necessary sufficient size, the portion where the width of the toilet seat becomes the largest interferes with the armrest or the support armrest. The pillar. Conversely, if the width of the toilet seat is the largest, the size of the pillar that does not interfere with the armrest or the support armrest is limited by the maximum distance between the allowed left and right handrails, so that the width of the seat is relatively small. As a result, the seat surface of the toilet seat cannot be made to have a sufficient size.

Further, in the present invention, since the outer shape of the toilet seat is formed to be approximately square, the gap between the toilet seat and the flat portion of the toilet body portion can be A step or the like is formed outside the thigh of the user who is sitting down. Therefore, in the present invention, it is possible to make the gap, the step, and the like which occur between the toilet seat and the flat portion of the toilet main body portion, and to prevent the user from sitting on the back side of the thigh portion of the seated person in the oblique direction. The skin on the back side of the thigh portion of the person is caught in a gap or a step which occurs between the toilet seat and the flat portion of the toilet body portion.

The toilet seat of the present invention has a projecting portion that is located further forward than the tip end portion of the opening portion, opposite to the end portion of the side edge. Furthermore, the toilet seat of the present invention has a front edge extending from the first end portion to the second end portion via the protruding portion, and the leading edge includes a curved portion having a first end portion and a protruding portion. a first inflection point; and a second inflection point between the second end and the protrusion. In addition, the "recurve point" in the present invention may be a portion in which the leading edge is convex from the rear toward the toilet seat and is convex toward the front of the toilet seat, and the changed portion is not only a point. In the case of a straight line, it also includes a case.

Thus, in the toilet seat of the present invention, the two end regions of the front edge are bent back toward the rear of the toilet seat to make the leading edge protrude, so that there is no receding seat at the opposite end portions of the conventional leading edge. The leading edge of the toilet seat does not interfere with the back side of the user's knee. Therefore, the user can easily sit deeply behind the toilet seat.

Moreover, in the toilet seat of the present invention, the central portion of the front edge protrudes forward from the opposite end portions of the front edge. Therefore, if the user deeply sits behind the toilet seat, the protruding portion of the leading edge abuts the user. The inside of both knees to induce the user's feet to open. Therefore, the user naturally makes a posture that is easy to excrete. In particular, in the case of a male user, the sex device can be easily directed downward, so that the user's urination can be prevented from scattering beyond the protruding portion of the leading edge.

Moreover, after the user's two-legged posture is opened, the user can wipe the buttocks from the front without having to make a half-turn posture. Further, even when the user is an elderly person or a caretaker who has to be wiped by the attendant or the caregiver, the user can wipe the user's buttocks without lifting the user, so that the burden of the follower or the like can be greatly reduced.

Furthermore, the curved portion of the leading edge of the present invention preferably includes a first curved portion that is convexly curved between the first end portion and the first inflection point and toward the rear of the toilet seat; the second curved portion, a convex bend between the second end portion and the second inflection point and toward the rear of the toilet seat; and a third curved portion between the first inflection point and the second inflection point and facing the front of the toilet seat Protruding and bending.

As described above, if the curved portion of the both end regions of the leading edge is convexly curved toward the rear of the toilet seat, and the curved portion of the central portion of the leading edge is convexly curved toward the front of the toilet seat, the user deeply sits in the toilet seat. At the rear, the shape of the both end regions of the leading edge coincides with the back side of the user's knee, so that the user's feet are opened in a gentle and smooth manner. Further, the shape of the leading edge becomes a convenient mark for placing the position of the foot when the user sits on the toilet seat.

In particular, if a top portion that is raised upward is provided in the vicinity of the protruding portion of the leading edge on the seat surface formed along the front edge of the toilet seat, the protruding portion of the leading edge and the top of the seating surface in the vicinity of the protruding portion are increased. The user's two feet open the induction effect, so that the user's feet can be opened more smoothly and surely. Therefore, compared to the case where only the protrusion is formed at the leading edge, the user can It is more natural to make a posture that is easy to excrete, and it is also possible to more reliably prevent the user from urinating and scattering more than the protruding portion of the leading edge.

Further, in the seat surface of the toilet seat of the present invention, it is preferable that a first concave portion that is recessed downward is disposed in the vicinity of the first curved portion of the leading edge, and a portion that is recessed downward is disposed in the vicinity of the second curved portion of the leading edge. Two recesses. That is, the first and second recesses that are recessed toward the lower side on both sides of the top of the seating surface formed along the front edge of the toilet seat, by the protruding portion of the leading edge and the top of the seating surface provided near the protruding portion, The feeling of the two legs of the user whose feet are induced to open is further improved, and the user's feet are prevented from being excessively opened, so that the user can make a near-ideal posture that is easier to urinate or defecate.

Moreover, in the case where the portable toilet having the toilet seat is provided with an armrest and a support for supporting the armrest from below, the toilet seat having an approximately square shape is preferably a first end portion and a second end portion of the toilet seat. It is placed in front of the pillars of the armrest.

If the first end portion and the second end portion of the toilet seat are disposed further forward than the pillar of the armrest, the shape of the front end portion of the toilet body portion can be made in addition to the installation space of the pillar of the armrest on the toilet body portion. It is approximately the same shape as the leading edge of the toilet seat. Therefore, the user who sits down on the toilet seat can freely move his/her own feet, particularly toward the outside.

Preferably, the toilet seat of the present invention includes: a first seating surface which is a first seating surface which is represented by a substantially linear shape in a cross section orthogonal to a tangent to the first side edge, and faces the opening portion with respect to a horizontal plane The inclination angle of the lower inclined first seating surface is formed by continuously increasing from the rear portion toward the front portion of the toilet seat, and thereafter continuously decreasing to become approximately horizontally formed And a second seat surface which is a second seat surface which is represented by a substantially linear shape in a cross section orthogonal to a tangent to the second side edge, and a second seat which is inclined toward the opening with respect to the horizontal plane and downward The inclination angle of the face is formed in such a manner as to continuously increase from the rear portion toward the front portion of the toilet seat, and thereafter continuously decrease to become approximately horizontal.

That is, the toilet seat of the present invention has a first seating surface and a second seating surface sandwiching the opening portion, and the inclination of the first and second seating surfaces is either from the rear of the toilet seat toward the front portion and toward the opening. The portion is continuously steepened, and then continuously becomes gentle, and becomes approximately horizontal near the leading edge of the toilet seat. Here, the "inclination angle" of the seat surface refers to the angle of the line segment representing the representative slope (slope) of the seat surface which is approximately linear in the cross section orthogonal to the side edge with respect to the horizontal plane.

Therefore, the first and second seating surfaces are induced so that the user's buttocks fall into the opening of the toilet seat when the user sits down on the toilet seat. As a result, the first and second seating surfaces lift the skin of the user's buttocks relative to the seat surface and open the anus of the user, so that the user's excretion is facilitated. Further, in the cross section of the toilet seat, it is shown as a substantially linear seating surface, and the above-described falling effect can be obtained by the inclination of the seat surface, and the cross section of the toilet seat does not necessarily have to be a plane which is represented only by a straight line. The configuration may include a curved surface that is slightly recessed downward or a curved surface that is raised upward.

Further, it is preferable that the inclination angle of the first seating surface becomes maximum in the toilet seat section orthogonal to the tangent to the first side edge and which becomes the largest dimension line through the width of the opening portion; and the inclination angle of the second seating surface In the second side The toilet seat section in which the tangent lines are orthogonal and the width of the opening portion becomes the largest becomes the largest.

If the inclination angle of the first seat surface and the inclination angle of the second seat surface become maximum at the position where the width of the opening portion of the toilet seat becomes maximum, the user's anus will be borrowed when the user sits down on the seat of the present invention. The width of the opening portion induced to the toilet seat by the first and second seating surfaces becomes the vicinity of the midpoint of the largest dimension line, so that the user's bowel movement can be dropped to a predetermined position in the water tub provided below the toilet seat . Therefore, the inclination of the first and second seating surfaces can prevent the user's defecation from splashing or adhering toward the periphery of the water tub, and the user's defecation can be buried in a predetermined depth in the water stored in the water tub, thereby preventing the stool from being exposed. The resulting odor is generated.

Further, generally, if the inclination angle of the first seating surface and the inclination angle of the second seating surface are the largest in the vicinity of the position where the width of the opening portion of the toilet seat becomes maximum, the user's anus is induced to the opening portion of the toilet seat. The width becomes the vicinity of the midpoint of the largest dimension line, so the inclination angle of the first seating surface and the inclination angle of the second seating surface are strictly unnecessary, and it is not necessary to maximize the width of the opening portion of the toilet seat. .

Then, in accordance with the present invention, a portable toilet of the present invention in which the toilet seat of the present invention is mounted is provided. In this case, the portable toilet of the present invention can enjoy the full benefits of the above-described toilet seat of the present invention.

Further, the portable toilet of the present invention is provided with a toilet body portion, and the toilet body portion is preferably divided into: the upper portion of the box portion is an opening, and has an opening from the opening edge of the opening toward the lower portion of the box portion and inclined rearward. a front portion; and a frame portion connected to the opening edge of the box portion.

As a means for improving the strength of the deformed toilet body portion, a method of providing a gusset rib or a reinforcing rib at the opening edge or the side surface of the toilet body portion, or a panel is disposed on each surface of the toilet body portion. The method of making the toilet body portion into a so-called box structure.

However, in particular, the gusset rib of the opening edge is structurally protruded from the toilet body portion toward the outside, so if a gusset rib is provided in the toilet body portion, the user is in a portable toilet or a portable toilet. When you move your feet nearby, you will become an obstacle to your feet. Therefore, in the present invention, the "box structure" which is advantageous for removing the projections such as the gusset ribs is used, thereby achieving the removal of the protrusions which may catch the user's feet, etc., particularly from the front portion of the toilet body portion. The step is made, and the front portion of the toilet body portion is formed into a smooth shape.

Moreover, if the general toilet body portion is formed into a box structure, the formability or maintainability of the toilet body portion is lowered. Therefore, in the present invention, a so-called two-piece structure is adopted, and the toilet body portion is constituted by two members. To solve the above problems, the two members are: a box portion whose upper portion is an opening; and a frame portion which is coupled to an opening edge of the opening by a screw or the like. Therefore, in the present invention, any of the box portion and the frame portion can be formed into a resin-made integrally molded product, and as a result, a portable toilet which is low in cost and strong can be provided.

Moreover, in the portable toilet of the present invention, the front portion of the box portion is inclined from the opening edge of the opening toward the lower side of the box portion and toward the rear side, so that the user can pull his/her own foot down directly to the front edge of the toilet seat or Behind it. Therefore, in the portable toilet of the present invention, the user's weight movement when sitting from the portable toilet station and/or when sitting down toward the portable toilet is mainly only moving up and down, so the user is portable. The toilet stands up and sits down towards the portable toilet. easy.

Further, in the portable toilet of the present invention, it is preferable that the outer surface of the box portion and the outer surface of the frame portion are connected to one side.

In the portable toilet of the present invention, the front end portion of the toilet body portion is shaped to have approximately the same shape as the front edge of the toilet seat, as described above, in order to allow the two feet of the user seated on the toilet seat to move freely. Therefore, if the outer surface of the box portion is connected to one surface of the frame portion, it can be formed from the front end portion of the toilet body portion toward the lower portion of the toilet body portion, and has a surface shape approximately the same as the shape of the leading edge of the toilet seat. Face.

As a result, if the outer surface of the box portion is connected to the outer surface of the frame portion, the protrusion or the step can be removed from the front portion of the toilet body portion to make the front portion of the toilet body portion more smooth. Further, since the protruding portion of the central portion of the front edge of the toilet seat can be continuously formed from the front edge of the toilet seat to the front surface portion of the toilet body portion, the user can smoothly promote the user when sitting deeply behind the toilet seat. The induction of the two feet is open.

The toilet seat of the present invention has an approximately square shape, so that if the toilet seat of the present invention is placed on a portable toilet (mobile toilet), the armrest of the toilet body portion or the support armrest can be prevented when the toilet seat is rotated. The interference of the pillars. Further, since a gap or the like which occurs between the toilet seat and the flat portion of the toilet main body portion is formed outside the thigh portion of the seated user, it is possible to prevent the skin on the back side of the user's thigh portion from being caught. This gap is medium.

In the front edge of the toilet seat of the present invention, the two end regions are bent back toward the rear of the toilet seat, so that the front edge of the toilet seat is convex, and the protruding portion (central region) It protrudes toward the front of the toilet seat, so that the user can easily sit deeply behind the toilet seat. Further, if the user deeply sits behind the toilet seat, the protruding portion of the leading edge abuts against the inner side of the user's knees and the user's feet are opened, so that the user can naturally make a posture that is easy to excrete. Further, after the user's two-legged posture is opened, the user can wipe the buttocks from the front without having to make a half-turn posture, and even if the user is a caretaker or the like, follow-up, etc. The user's buttocks can be wiped without lifting the user, so that the burden of attendance and the like can be greatly reduced.

The seat surface of the toilet seat of the present invention has a shape in which the inclination of the seat surface is continuously steepened toward the opening portion from the rear portion toward the front portion of the toilet seat, and thereafter continuously becomes gentle, and the leading edge of the toilet seat The neighborhood becomes approximate. Therefore, when the user sits down on the seat of the present invention, the user's buttocks are induced to fall into the opening of the toilet seat, and the skin of the user's buttocks is lifted relative to the seat surface, so that the user can be allowed to The anus is opened to make the user's bowel movement easy.

In the toilet seat according to the present invention, when the end portion of the front edge of the toilet seat is disposed in front of the pillar of the armrest, the shape of the front end portion of the toilet body portion can be made to be in front of the toilet seat in addition to the space for securing the pillar of the armrest. The edge is approximately the same shape, so the user sitting in the seat can move his or her feet, especially toward the outside.

In addition to the above-described toilet seat of the present invention, the portable toilet of the present invention further includes the so-called "box structure" of the toilet body portion, so that in addition to securing the necessary strength, the portable toilet can be removed from the surface of the toilet body portion. Will hook the protrusions or steps of the ribs of the user's foot, etc., and will The surface of the barrel body portion is formed into a smooth shape. Further, since the toilet main body portion has a so-called two-piece structure that is divided into a box portion and a frame portion, any one of the members can be molded as a resin-made integrally molded product, and can provide a low-cost and strong structure. Portable toilet. In addition, the portable toilet of the present invention can of course enjoy the full benefits of the above-described toilet seat of the present invention without further explanation.

Further, in the portable toilet of the present invention, the front portion of the toilet body portion is inclined from the opening edge of the opening toward the lower side of the box portion and toward the rear side, so that the user starts from the portable toilet station and/or faces the portable type. When the toilet is seated, the user can pull his or her foot down to the front of the front edge of the toilet seat. As a result, when standing up and/or sitting down on the portable toilet, the user's weight moves, mainly only by moving up and down, making it easy to stand up and sit down.

1‧‧‧ portable toilet

2‧‧‧ toilet body

3‧‧‧Acceptance Department

4‧‧‧seat

5‧‧‧ cover

6‧‧‧bowl

7‧‧‧Auxiliary cover

20‧‧‧Handrail

21‧‧‧ Backrest

22‧‧‧foot

23‧‧‧Box Department

24‧‧‧ Frame Department

27‧‧‧The front end of the toilet body

46‧‧‧ inner edge

47‧‧‧Seat along the leading edge

200‧‧‧ pillar

230‧‧‧Open edge

231‧‧‧ front part

400‧‧‧ tip

401‧‧‧ dimension line with maximum opening width

430‧‧‧ first end

440‧‧‧second end

450‧‧‧Protruding

451‧‧‧First recurve

452‧‧‧second recurve

453‧‧‧ Curve Department

40‧‧‧ openings

41‧‧‧First seat

42‧‧‧Second seat

43‧‧‧First side edge

44‧‧‧Second side

45‧‧‧ leading edge

454‧‧‧First bend

455‧‧‧second bend

456‧‧‧ Third bend

470‧‧‧ top

471‧‧‧First recess

472‧‧‧Second recess

Fig. 1 is a schematic view showing a portable toilet of the present invention in which the lid portion is opened and the toilet seat of the present invention is attached.

Fig. 2 is a schematic view of the portable toilet of the present invention in which the lid portion and the toilet seat are in an open state and the toilet seat of the present invention is attached.

Figure 3 is a schematic view showing the assembly of the portable toilet of the present invention.

Fig. 4 is a schematic view of a toilet seat of the present invention.

Figure 5 is a plan view of the toilet seat of the present invention.

Fig. 6 is a cross-sectional view and a front view of the toilet seat shown in Fig. 5 from the A-A section to the D-D section.

Fig. 7 is a schematic view showing the assembly of the toilet body portion of the portable toilet of the present invention.

Figure 8 is a side elevational view of the portable toilet of the present invention.

Hereinafter, a toilet seat according to an embodiment of the present invention and a portable toilet according to an embodiment of the present invention in which the toilet seat is attached will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below, and various modifications can be made without departing from the spirit and scope of the invention.

In the first drawing, a schematic view of the portable toilet 1 in which the lid portion 5 is opened and the toilet seat 4 according to the embodiment of the present invention is attached is shown. In the second drawing, a schematic view of the portable toilet 1 in which the lid portion 5 and the toilet seat 4 are opened and the toilet seat 4 of the present embodiment of the present invention is attached is shown. Further, Fig. 3 is a schematic view showing the assembly of the portable toilet 1 according to the embodiment of the present invention, and the portable toilet 1 shown in Figs. 1 and 2 is also an embodiment of the present invention.

As shown in Fig. 3, the portable toilet 1 of the present embodiment is a toilet body portion 2, a receiving portion 3 for constituting a top surface of the toilet body portion 2, a toilet seat 4, and a cover portion 5, which are mounted on The water tub 6 in the toilet main body portion 2 and the auxiliary cover 7 of the water tub 6 are configured, and the respective constituent elements are detachably attached to each other. Further, the toilet body portion 2 includes an armrest 20, a backrest 21, and a leg portion 22. Moreover, it can be understood from the first drawing and the second drawing that the toilet seat 4 of the present embodiment is rotatably attached to the receiving portion 3 of the toilet body portion.

Fig. 4 is a schematic view showing the toilet seat 4 of the present embodiment, and Fig. 5 is a plan view showing the toilet seat 4 of the present embodiment.

Referring to Figures 4 and 5, it can be understood that the toilet seat 4 of the present embodiment includes a first side edge 43 which is approximately straight from the front to the rear of the toilet seat 4. Extending the second side edge 44 on the opposite side of the first side edge 43 and extending from the front to the rear of the toilet seat 4 in a substantially linear manner; and the leading edge 45, and in the toilet seat 4 The interior has an opening 40 that is closed by the inner edge 46.

Fig. 6 is a cross-sectional view showing the toilet seat 4 shown in Fig. 5 from the A-A cross section to the D-D cross section orthogonal to the first side edge 43 and the second side edge 44, and a front view of the toilet seat 4.

The toilet seat 4 of the present embodiment has a substantially square shape, and the approximately square shape includes first and second side edges 43, 44 which extend approximately linearly on the outer side of the toilet seat 4 and are substantially parallel and juxtaposed; The inner edge 46 divides (intervals) the egg-shaped opening portion 40 on the inner side of the toilet seat 4 (see Fig. 5). Therefore, in the toilet seat 4 of the present embodiment, as shown in Fig. 6, the width W of the toilet seat section in the cross section orthogonal to the tangent to the first side edge 43, and the tangent to the second side edge 44 The width W of the toilet seat section in the intersecting section is continuously reduced from the rear portion toward the front portion of the toilet seat 4, and is continuously enlarged thereafter, and is continuously reduced as it goes from the rear portion of the toilet seat 4 toward the front portion. And thereafter continuously expanded.

In addition, the "edge" in the present embodiment means the outline of the toilet seat 4 shown in Fig. 5 and the end surface on which the contour is formed. Further, the "about linear shape" does not need to be a complete straight line such as the first side edge 43 or the second side edge 44 shown in Fig. 5, and also includes a polygonal line slightly curved into a "ㄑ" shape or a large A slightly curved curve depicted in radians. Further, the "front portion" refers to an area in which an adult user is placed in the vicinity of the front side of the toilet seat 4 and the portable toilet 1 when sitting on the toilet seat 4; and the "rear" means to make When the user's user sits on the toilet seat 4, it is disposed in the field near the toilet seat 4 on the back side of the user and the rear of the portable toilet 1. Further, the width W of the toilet seat section, as shown in Fig. 6, is shown as the distance between the first side edge 43 and the inner edge 46 of the toilet seat 4 or the distance between the second side edge 44 and the inner edge 46.

As described above, since the toilet seat 4 of the present embodiment has a substantially square shape and the opening portion 40 is oval, the seat surfaces 41 and 42 of the toilet seat 4 can be made to have a sufficient size, and even the armrest 20 of the portable toilet 1 can be used. The support post 200 is disposed adjacent to the outer side of the first and second side edges 43, 44 of the toilet seat 4. When the toilet seat 4 is rotated, the toilet seat 4 does not interfere with the armrest 20 and the support arm rest 200 (refer to the first 2)).

If the first side edge 43 and the second side edge 44 of the toilet seat 4 are arranged, for example, in a "eight-shaped shape", and if the seat surfaces 41, 42 of the toilet seat 4 are sufficiently sized as necessary, the width of the toilet seat 4 becomes maximum. The portion interferes with the armrest 20 or the strut 200 supporting the armrest. Conversely, if the portion where the width of the toilet seat 4 is the largest is the size of the strut 200 that does not interfere with the armrest 20 or the supporting armrest, it is limited by the maximum distance between the allowed left and right armrests 20, so that the shape of the seat 4 is The width is relatively small, and as a result, the necessary sufficient size of the seating faces 41, 42 of the toilet seat 4 cannot be ensured.

Further, in the toilet seat 4 of the present embodiment, a gap or a step which occurs between the side edges 43, 44 of the toilet seat 4 and the plane portion of the toilet body portion 2 is formed outside the thigh portion of the seated user (refer to Figure 1). Therefore, in the present embodiment, the gap or the step which occurs between the toilet seat 4 and the flat portion of the toilet main body portion 2 can be prevented from being obliquely traversed in the oblique direction to the back side of the user's thigh portion. Solve the skin on the back side of the user's thigh The skin is caught in the gap or step difference that occurs between the toilet seat 4 and the flat portion of the toilet body portion 2.

As shown in Fig. 5, the first side edge 43 of the toilet seat 4 has a first end portion 430 which is located outside the toilet seat 4 and located further rearward than the tip end portion 400 of the opening portion 40; and the second side edge of the toilet seat 4 44 has a second end 440 that is located outside the toilet seat 4 and that is located further rearward than the tip end portion 400 of the opening 40.

Further, the leading edge 45 also has a first end portion 430 and a second end portion 440 that are common to the first side edge 43 and the second side edge 44; and further has a protruding portion that is located further forward than the tip end portion 400 of the opening portion 40. 450. Further, the leading edge 45 has a first inflection point 451 between the first end 430 and the protrusion 450, and a second inflection point 452 between the second end 440 and the protrusion 450. . Therefore, the front edge 45 of the toilet seat 4 extends from the first end portion 430 to the second end portion 440 via the protruding portion 450 in front of the toilet seat 4.

In the present embodiment, the "end portion" of the side edges 43, 44 of the toilet seat 4 refers to the side edges 43, 44 extending in the longitudinal direction of the toilet seat 4, and extends toward the front in the width direction of the toilet seat 4. The edge 45 is a corner portion that changes substantially in direction, and the corner portion is not only a pointed portion but also a rounded portion having R. In addition, the "recurve point" may be a portion in which the leading edge 45 is convexly formed from the rear toward the toilet seat 4 so as to be convex toward the front of the toilet seat 4. The changed portion is not only a point but also a point. Contains the case of a straight line.

Thus, in the toilet seat 4 of the present invention, the end regions of the front edge 45 are bent back toward the rear of the toilet seat 4, and the front edge 45 is protruded (see FIG. 5). Into the rear of the toilet seat 4, compared to There is no receding toilet seat at the both end regions of the leading edge, and the front edge 45 of the toilet seat 4 does not interfere with the back side of the user's knee. Therefore, the user can easily sit deeply behind the toilet seat 4 of the present embodiment.

Further, in the toilet seat 4 of the present embodiment, the central portion of the front edge 45 protrudes forward from the opposite end portions of the front edge 45. Therefore, if the user deeply sits behind the toilet seat 4, the front edge 45 protrudes. The portion 450 abuts the inside of the user's knees to induce the user's feet to open. Therefore, the user naturally makes a posture that is easy to excrete, and particularly in the case of a male user, the sex device can be easily directed downward, so that the user's urination can be prevented from scattering beyond the protruding portion 450 of the leading edge 45.

Moreover, after the user's two-legged posture is opened, the user can wipe the buttocks from the front without having to make a half-turn posture. Further, even when the user is an elderly person or a caretaker who has to be wiped by the attendant or the caregiver, the user can wipe the user's buttocks without lifting the user, so that the burden of the follower or the like can be greatly reduced.

In the present embodiment, the curved portion 453 of the leading edge 45 includes a first curved portion 454 that is convexly curved between the first end portion 43 and the first inflection point 451 and toward the rear of the toilet seat 4; the second bending a portion 455 that protrudes between the second end portion 44 and the second inflection point 452 and toward the rear of the toilet seat 4; and a third curved portion 456 at the first inflection point 451 and the second inflection point Bending between the 452 and toward the front of the toilet seat 4 (see Figures 4 and 5).

As described above, if the curved portion 453 of the both end regions of the leading edge 45 is convexly curved toward the rear of the toilet seat 4, and the curved portion 453 of the central portion of the leading edge 45 is convexly curved toward the front of the toilet seat 4, the user Sit deeply into the toilet seat At the rear of 4, the shape of the both end regions of the leading edge 45 coincides with the back side of the user's knee, so that the user's feet are opened in a gentle and smooth manner. Further, the shape of the leading edge 45 becomes a convenient mark for placing the position of the foot when the user sits on the toilet seat 4.

Referring to Fig. 6(e), the toilet seat 4 of the present embodiment can be understood that the seat surface 47 formed along the front edge 45 of the toilet seat 4 has a top portion 470 that is raised upward in the vicinity of the protruding portion 450 of the front edge 45.

The protruding portion 450 of the leading edge 45 and the top portion 470 of the seating surface 47 provided in the vicinity of the protruding portion 450 increase the user's two-foot opening-inducing effect, so that the user's feet can be opened more smoothly and surely. . Therefore, compared with the case where only the protruding portion 450 is formed at the leading edge 45, the user can more naturally make a posture that is easy to excrete, and it is possible to more reliably prevent the urination of the user from scattering beyond the protruding portion 450 of the leading edge 45.

Further, in the seat surface 47 of the toilet seat 4 of the present embodiment, a first recessed portion 471 that is recessed downward is formed in the vicinity of the first curved portion 454 of the leading edge 45, and is formed in the vicinity of the second curved portion 455 of the leading edge 45. A second recess 472 that is recessed downward. That is, the first and second recesses 471, 472 recessed on both sides of the top portion 470 of the seating surface 47 formed along the front edge 45 of the toilet seat 45, and the projections 450 and projections of the leading edge 45 The top 470 of the seat surface 47 disposed near 450 increases the fit of the two legs of the user whose legs are induced to open, and prevents the user's feet from being excessively opened, thereby making it easier for the user to make it easier. Urinary or defecation close to the ideal posture.

Further, as shown in Fig. 1, when the portable toilet 1 to which the toilet seat 4 is attached is provided with the armrest 20 and the support post 200 supporting the armrest from below, In the toilet seat 4 of the embodiment, the first end portion 430 and the second end portion 440 of the toilet seat 4 are disposed further forward than the pillar 200 of the armrest.

If the first end portion 430 and the second end portion 440 of the toilet seat 4 are disposed further forward than the pillar 200 of the armrest, the front end of the toilet body can be provided in addition to the installation space of the pillar 200 of the armrest on the toilet body portion 2. The portion 27 is shaped to have approximately the same shape as the leading edge 45 of the toilet seat 4. Therefore, the user sitting on the toilet seat 4 can freely move his/her own feet, particularly toward the outside.

The toilet seat 4 of the present embodiment has a first seating surface 41 and a second seating surface 42 that sandwich the opening 40 (see Figs. 4 and 5). Further, as shown in FIG. 6, the first seating surface 41, which is shown as a substantially linear shape in a cross section orthogonal to the tangent to the first side edge 43, is inclined toward the opening 40 with respect to the horizontal plane and downward. The inclination angle α of the first face 41 is formed in such a manner as to continuously increase from the rear portion toward the front portion of the toilet seat 4, and thereafter continuously decrease to become approximately horizontal. Further, the second seat surface 42 which is formed in a substantially linear shape in a cross section orthogonal to the tangent to the second side edge 44 is inclined to the second seat surface 42 which is inclined downward toward the opening 40 with respect to the horizontal plane. The angle α is formed in such a manner as to continuously increase from the rear of the toilet seat toward the front portion, and thereafter continuously decrease to become approximately horizontal.

That is, the inclination of the first and second seating faces 41, 42 is continuously steepened as it goes from the rear portion toward the front portion of the toilet seat 4 toward the opening portion 40, and then continuously becomes gentle, and is in the toilet seat. The vicinity of the leading edge 45 of 4 becomes approximately horizontal. Here, the "inclination angle α" of the seat surfaces 41 and 42 means the seat surfaces 41 and 42 which are shown as approximately linear in the cross section orthogonal to the side edges 43 and 44. The angle of the representative slope (slope) of the line segment to the horizontal plane (see Figure 6).

Therefore, when the user sits on the toilet seat 4, the first and second seating faces 41, 42 induce the user's buttocks to fall into the opening of the toilet seat. As a result, the first and second seating surfaces 41 and 42 lift the skin of the buttocks of the user relative to the seating surfaces 41 and 42 and open the anus of the user, thereby facilitating the excretion of the user. effect. Further, in the cross section of the toilet seat 4, the seat surfaces 41 and 42 which are approximately linear in shape are shown, and the above-described falling effect can be obtained by the inclination of the seat surfaces 41 and 42, and the cross section of the toilet seat 4 does not necessarily have to be only It is constituted by a plane which is shown as a straight line, and as shown in Fig. 6(e), it is also possible to include a curved surface which is slightly recessed downward.

Further, in the toilet seat 4 of the present embodiment, the inclination angle α of the first seating surface 41 is orthogonal to the tangent to the first side edge 43 and the width line 401 which becomes the largest by the width of the opening 40 (Fig. 5) The toilet seat becomes the largest in the profile. Further, the inclination angle α of the second seating surface 42 is maximized in the toilet seat section of the dimension line 401 (Fig. 5) which is orthogonal to the tangent to the second side edge 44 and which becomes the largest by the width of the opening 40.

If the inclination angle α of the first seating surface 41 and the inclination angle α of the second seating surface 42 become maximum at the position where the width of the opening portion 40 of the toilet seat 4 becomes maximum, when the user sits down on the toilet seat 4 of the present invention, The anus of the user is induced by the first and second seating faces 41, 42 until the width of the opening 40 of the toilet seat 4 becomes the vicinity of the midpoint of the largest dimension line 401, so that the user's bowel movement can be lowered. To a predetermined position in the water tub 6 provided below the toilet seat 4 (see Fig. 1). Therefore, the inclination of the first and second seating faces 41, 42 can prevent the user's defecation from splashing or adhering toward the periphery of the water tub 6, and let The user's defecation is indeed buried at a predetermined depth in the water stored in the tub 6, and the occurrence of odor caused by the exposing of the stool can be prevented.

Further, generally, if the inclination angle α of the first seating surface 41 and the inclination angle α of the second seating surface 42 are the largest near the position where the width of the opening portion 40 of the toilet seat 4 becomes maximum, the user's anus will be The width of the opening 40 of the toilet seat 4 is induced to become near the midpoint of the largest dimension line 401, so the inclination angle α of the first seating surface 41 and the inclination angle α of the second seating surface 42 are strictly speaking in the toilet seat 4 It is not necessary that the position at which the width of the opening portion 40 becomes the largest becomes maximum.

Next, a portable toilet 1 according to an embodiment of the present invention in which the toilet seat 4 of the present embodiment is attached will be described with reference to Figs. Fig. 7 is a schematic view showing the assembly of the toilet body portion 2 of the portable toilet 1 of the present embodiment. Fig. 8 is a side view showing the portable toilet 1 of the present embodiment. Further, the portable toilet 1 of the present embodiment can enjoy all the benefits of the toilet seat 4 of the above-described embodiment.

As shown in Fig. 7, the portable toilet 1 of the present embodiment has a toilet body portion 2 including an armrest 20, a backrest 21, and a leg portion 22. Further, the toilet main body portion 2 is divided into a box portion 23 whose upper portion is open, and a frame portion 24 that is connected to the opening edge 230 of the box portion 23. Further, the box portion 23 has a front surface portion 231 which is inclined from the opening edge 230 of the opening toward the lower side of the box portion 23 and toward the rear.

The portable toilet 1 of the present embodiment adopts a so-called "box structure" which is particularly advantageous for removing projections such as gusset ribs of the opening edge 230, whereby the front portion 231 of the toilet body portion 2 is removed in particular. Will hook The front portion 231 of the toilet body portion 2 is formed into a smooth shape by a projection or a step of the user's foot or the like.

Further, the portable toilet 1 of the present embodiment divides the toilet body portion 2 into two members by a so-called two-piece structure, the two members being the box portion 23 having an open upper portion; and the frame portion 24 The opening edge 230 facing the opening is coupled by a screw or the like. Therefore, the case portion 23 and the frame portion 24 of the portable toilet 1 of the present embodiment are formed in a resin-formed integrally molded product. As a result, the portable toilet 1 of the present embodiment can Made in a low cost and sturdy way.

Further, as shown in Fig. 8, the portable toilet 1 of the present embodiment has the front portion 231 of the box portion 23 inclined from the opening edge 230 of the opening toward the lower side of the box portion 23 and toward the rear, so that the user can himself The foot is pulled down directly below or behind the leading edge 45 of the toilet seat 4 (see Figure 1). Therefore, in the portable toilet 1 of the present embodiment, when the user stands up from the portable toilet 1 and/or moves toward the portable toilet 1, the weight is mainly moved up and down, so the user It is easy to sit up from the portable toilet 1 and sit down toward the portable toilet 1.

Further, in the portable toilet 1 of the present embodiment, the outer surface of the box portion 23 and the outer surface of the frame portion 24 are connected to one surface (see Figs. 1 and 2).

In the portable toilet 1 of the present embodiment, the front end portion 27 of the toilet main body portion 2 is shaped to have approximately the same shape as the front edge 45 of the toilet seat 4 in order to freely move the two legs of the user seated on the toilet seat 4. See Figure 1). Therefore, if the outer surface of the box portion 23 is connected to one surface of the outer surface of the frame portion 24, it can be formed from the front end portion 27 of the toilet body portion 2 toward the lower portion of the toilet body portion 2. The face has a surface shape anterior face 231 that is approximately the same as the shape of the leading edge 45 of the toilet seat 4.

As a result, the portable toilet 1 of the present embodiment can exclude the protrusion or the step from the front surface portion 231 of the toilet body portion 2, and the front portion 231 of the toilet body portion 2 can be made into a more smooth shape. Further, the protruding portion 450 of the central portion of the front edge 45 of the toilet seat 4 can be continuously formed from the front edge 45 of the toilet seat 4 to the front surface portion 231 of the toilet body portion 2, so that the user deeply sits in the toilet seat 4 At the rear, the user's two feet can be smoothly promoted.

40‧‧‧ openings

41‧‧‧First seat

42‧‧‧Second seat

430‧‧‧ first end

440‧‧‧second end

450‧‧‧Protruding

43‧‧‧First side edge

45‧‧‧ leading edge

46‧‧‧ inner edge

454‧‧‧First bend

455‧‧‧second bend

456‧‧‧ Third bend

Claims (13)

A toilet seat is a toilet seat that is placed on a portable toilet and is provided with: an opening portion that is closed around; a first side edge that is located outside the front seat of the toilet seat from a tip end portion of the opening portion a first end portion extending to a rear portion of the toilet seat and extending in a substantially linear manner; and a second side edge on a side opposite to the first side edge and outside the toilet seat, from a tip end portion of the opening portion a second end portion located further rearward to a rear portion of the toilet seat, extending in a substantially linear manner; and a leading edge passing from the first end portion via a protruding portion located further forward than a tip end portion of the opening portion Extending to the second end portion, and including a curved portion having a first inflection point between the first end portion and the protruding portion, and having a portion from the second end portion to the protruding portion A second inflection point between the two, wherein the seat surface of the toilet seat has a top portion that is raised upward in the vicinity of the protruding portion of the front edge. A toilet seat is a toilet seat that is placed on a portable toilet and is provided with an egg-shaped opening that is closed around; the first side edge is outside the toilet seat and is from a tip end portion of the opening portion a first side edge located at a rearmost rear end extending to a rear portion of the toilet seat, and the aforementioned side in a cross section orthogonal to a tangent to the first side edge The width of the seat section is configured to be continuously reduced from the rear portion of the toilet seat toward the front portion and continuously enlarged thereafter; the second side edge is on the opposite side of the first side edge and in the aforementioned seat a second side edge extending from a second end portion located further rearward than a tip end portion of the opening portion to a rear portion of the toilet seat, and the toilet seat portion in a cross section orthogonal to a tangent to the second side edge The width is continuously reduced as it goes from the rear portion of the toilet seat toward the front portion, and is continuously enlarged thereafter; and the leading edge is protruded further forward than the tip end portion of the opening portion. Extending from the first end portion to the second end portion, and including a curved portion having a first inflection point between the first end portion and the protruding portion, and having a second inversion from the foregoing A second inflection point between the end portion and the protruding portion, wherein the seating surface of the toilet seat has a top portion that is raised upward in the vicinity of the protruding portion of the front edge. The toilet seat according to claim 1 or 2, wherein the curved portion includes: a first curved portion that is convexly curved between the first end portion and the first inflection point and toward the rear of the toilet seat; a second curved portion that is convexly curved between the second end portion and the second inflection point and toward a rear of the toilet seat; and a third curved portion at the first inflection point and the second portion The curvature is convex between the inflection points and toward the front of the aforementioned toilet seat. The toilet seat according to claim 1 or 2, wherein the toilet seat includes: a first seating surface; and a first seating surface which is represented as a substantially linear shape in a cross section orthogonal to a tangent to the first side edge, The inclination angle of the first seating surface inclined toward the opening portion with respect to the horizontal plane and downward toward the lower portion is formed in such a manner as to continuously increase from the rear portion of the toilet seat toward the front portion and thereafter continuously decrease to become approximately horizontal; And the second seating surface is a second seating surface that is represented by a substantially linear shape in a cross section perpendicular to a tangent to the second side edge, and is inclined to face downward with respect to the horizontal plane The inclination angle of the seat surface is formed in such a manner as to continuously increase from the rear portion of the toilet seat toward the front portion, and thereafter continuously decrease to become approximately horizontal. The toilet seat according to claim 4, wherein the inclination angle of the first seating surface becomes equal to a cross section perpendicular to the tangent of the first side edge and becomes a maximum dimension line through which the width of the opening portion becomes the largest The maximum inclination angle of the second seating surface is maximized in the toilet seat cross section orthogonal to the tangent to the second side edge and passing through the dimension line in which the width of the opening portion becomes the largest. The toilet seat according to claim 1 or 2, wherein the seat surface of the toilet seat has a first recess recessed downward toward the lower side of the first curved portion of the front edge, and the second bend at the front edge In the vicinity of the portion, there is a second recess that is recessed downward. The toilet seat according to claim 2, wherein any one of the first side edge and the second side edge extends in a substantially linear manner. The toilet seat according to claim 1 or 7, wherein the first side edge is disposed approximately parallel to the second side edge. A portable toilet equipped with a toilet seat as claimed in claim 1 or 2. The portable toilet according to claim 9, wherein the portable toilet has a toilet body portion, and the toilet body portion is divided into a box portion having an upper portion open and having an opening edge from the opening a front portion that is inclined downward toward the rear of the box portion; and a frame portion that is connected to the opening edge of the box portion. The portable toilet according to claim 10, wherein an outer surface of the box portion and an outer surface of the frame portion are connected to one surface. The portable toilet according to claim 10, wherein each of the box portion and the frame portion is an integrally molded product made of resin. The portable toilet of claim 10, wherein the portable toilet has an armrest and a support for supporting the armrest from below; the first end and the second end of the toilet seat are disposed in the armrest The aforementioned pillars are more forward.